Hemi heads on poly engine. Announcements; ↳ TheHemi.
Hemi heads on poly engine. ALL Hemi engines, 54 to 58, had 4-bbl intake manifolds.
Hemi heads on poly engine So to answer your question " which old style hemi parts will interchange . 250˝ stroke. Worked on poly header configurations for two years. Chrysler hemi motor bore and stroke data, with deck heights, rod dimensions, safe limit of the blocks, but certainly . 5°, an improvement over the 6-23° reverse-inclination of typical Your on it. Head studs Hot Heads long tube headers Crane Hyd Roller Ross Pistons 10. Plymouth also rolled out its first V8 in ’55, sporting polyspherical combustion chambers and a choice of two displacements, 241 and 260 cubic inches. NONe of the heads are interchangeable from one "family" to another with the exception of the desoto 325 ci poly engine which was a Dodge 325. That is Chrysler to Chrysler, Dodge and Plymouth to Dodge and Plymouth, no DeSoto. The HEMI has opposed to each other and the Poly being off set. (The 325 ci. crank, cam, intake manifold, water pump etc. This is a 301 Poly block and 331/354 crank and hemi heads. e. DeSoto Hemi heads fit DeSoto Hemi blocks. Hemi engine about 80% complete. They will not interchange between motors. 1956 331 poly with Hemi heads. The '55 Chr 301 Poly is hemi based, the '57 Plym 301 is an A. Within families the poly can be converted to a hemi. The issue with the starter and cable is questionable as that could be an easy way out of knowing any potential internal engine issues. Bogie Poly A-block Engine Package Suffix Numbers “1” directly after the ID denotes a “Standard” engine package: This is the most common type of engine found in cars and light trucks. In theory, the hemi head design permits better port location and alignment (compared to a wedge motor). the reason why i ask is i found one, A full long block untouched out of a 58 dodge suburban miles unknown. 9775" Stock crank Balanced rotating assembly Adjustable rockers from Rocker Arms Unlimited Molnar rods "555" Heads, they've been ported somewhat, but it was done by a cousin in the sixties while building it for his drag car. D63-1 would me a 270 Poly -- but if you look at the pad, it looks like D63-I. Your jackpot journey begins here! Hit Tusk Casino login for the best slots and table games in South Africa. Bruce writes from Toth Performance: A little update for all you Mopar Poly faithful, it has been a little over two years since Roland Osborne of Chrysler Power and I discussed the potential of the The Chrysler A engine is an OHV small-block V8 gasoline engine built by Chrysler from 1956 until 1967. The 331 Hemi has the thermostat and crossover built into the intake and a different timing cover. 060”. And you are 100% correct, these heads will not bolt on to a Dodge Poly or Red Ram Hemi, or a DeSoto Hemi. The 277/303/313/318/326 are the later "A" Poly engines, different than the Dodge Hemi based Polys 241/259/270. $500. Poly engines were also used in many Dodge trucks (Power Wagons) of The Poly head engine was a derivative of the early Hemi engine, based on the Dodge Red Ram 241CI engine. The poly came with a 2 barrel but a 4 barrel was optional at extra cost. Will throw in a 392 hemi crank core for an extra $500 (in pics) Can ship through Fastenal for less than $250 to most of Chrysler Hemi Engine . 1955 model Dodge passenger cars got 270 poly or 270 hemi engines, depending on the model and options selected. 315/325 Crank . Poly heads will fit on a hemi block, but the push rod holes are different. Guys are racing these Windsor Polys at Bonneville with Hemi heads. Message. Pulled the poly and installed a BB problem solved. They were called Polyspheric or Poly engines, because they featured polyspherical-shaped (me I'm aware that common belief is that switching to HEMI heads on a Poly will drop the compression by at least a point and that valve clearance reliefs are in different locations. i could be dead wrong tho never-the-less. in Rapid City, SD. is this swap worth doing ? I realize the early heads have smaller ports and valves- I would port the heads. Sequence Year Name C. were a swap meet find and will fit the poly or If you like turning your own wrenches, we offer complete top end and rotating assemblies so you can build your own tire fryer. 1 cu in (4. Member. SHARE POST #13. The most common version being the 318. JOHN/B ↳ Crate Hemi Engines; Racing Action; ↳ Current Hemi Racing; ↳ Hemi Conversion; which poly motors can be converted to hemi using factory parts, and why. Gaskets and Gasket Sets - Chrysler: P/N 90130: 331 (51-54) Full Set - Best: $ 269. It featured polyspherical combustion chambers, and was offered in displacements from 276. All Windsor/Spitfire engines can be converted to a HEMI engine if you have: heads, rocker assemblies, valve covers, spark plug tubes, pushrods, and pistons. " in a nut shell, None Chrysler also built a dedicated engine for the Windsor, and other humbler cars, beginning in 1955: the Spitfire Poly. Early Dodge, Plym & DeSoto Polys were Dodge hemi blocks. The Dodge poly/hemi has the smallest bore centre, followed by the DeSoto hemi, Chrysler hemi/poly with the "Plymouth" poly (A block) the largest. Hemi heads will bolt right on to a Poly block I believe (although I've never tried it) that hemi heads will work on a poly block, but poly heads will not work on a hemi block without elongating these push rod holes. I want to put 315 hemi heads on my 318 polysphere and I think without much work it can be done. This actually could be the Dodge “Poly” 325 V8 dubbed the “semi-hemi”. Condition. I have a 402ci Pavlovich Poly engine here waiting for some trick heads. 73RR, Feb 16, 2011. 241, 270, 315, 325. Hobbies › Car Engines & Parts. The first engine released to Plymouth in 1955 was the Dodge block of 241 inches, which was designed to use both Hemi and Poly If you have any time and access to a rusty Poly Head or two, please get porting. Dist. The complete head assembly & cam are different. If these cars have a poly motor, it's a Dodge motor. More info in here:. There is a lot to explain. DeSoto never produced a poly head motor so DeSoto hemi heads won't work on anything but a DeSoto hemi. But what's wrong with the poly, it's a good engine and you don't see many very often bg. The 1957 fury came out with the 318 wide block semi hemi, It was a wide block of course but the heads had polyshperical chambers just like the hemi head except smaller. Your Early Chrysler Hemi Headquarters! Hot Heads Research & Racing, Inc. are all the same poly/hemi for given size engine. 375” to fit the smaller low deck main bearings, or line-boring the main saddles to accept the larger 315/325 main bearings. The hemi based Polys can be converted to Hemi, the A Poly can't different engine. is this swap worth doing ? They were actually completely Hemi from the waist down, i. Outside of the Poly, the evenly spaced exhaust port configuration is only seen on Chrysler's hemispherical-head engines. They were never offered in an "A" body. Put "Hemi tech Index" in search. 5625″, larger than any other Chrysler As I'm taking a Chrysler 301 poly apart I was amazed at the port size and overall design. Good rebuildable core, the poly did run before I swapped heads, have the spark plug tubes but 1 rocker assembly is missing. Just look at those camshaft lobes! View attachment 1716337310 Heres what I've got: a 1955 chrysler 301 poly motor, complete, I have access to a pair of 1955 Chrysler 331 hemi heads, rocker arms, head bolts, a four barrel intake. It has 1/2˝ head studs, 9/16˝ main studs, and has a 4. 1 hemi design. The intake valves can be inclined to improve the “down-draft” angle of the port (as in a wedge), but the exhaust valve can be separately positioned to incline more favorably to the exhaust port (in this case, 26. (In '55, poly was Red Ram and Super Red Ram was hemi. Firesweep Poly head motor installed in some 1957 DeSotos were actually Dodge motors built in the Dodge engine plant. I would like to know if there is a lip on the block to mount the pan. Chrysler Hemi Engine All engine numbers are stamped on top of block in The industrial marine and poly motors are not included. 315 Poly Engine (complete) 325 Poly Engine (complete) 325 Hemi Engine (complete) 241/270 Water pump housing and water pumps . The 54-56 heads are prefered. Desoto Hemi heads will not work with Dodge or Plymouth blocks, they are slightly longer. 500˝ bore and 4. for 331-392 Chrysler hemi: Poly 318 head with rocker assembly "Chrysler" and "Mopar" names for reference purposes only. Weiand #7623 dual 4 bbl. It came in 3 displacements, 277, 301 & 318. com Updates; ↳ Mopar Events; ↳ Mopar News; 1st Gen HEMI (241-392 "Early HEMI") ↳ How-Tos, Tips and Basically the hemi engine with different heads DeSoto Firedome hemi, 1952 - 58. Luckily for those with fabrication skills or willing to pay a welder, some non-A-block exhaust ports align closely with the A-block and can be Heads. problem- the Spitfire poly uses the newer style water jacket/thermostat housing. I also don't think that within Chrysler the 392 head swaps to a Chrysler poly. Hnstray said Vintage Chrysler Poly V8 at the HOT ROD’s 2015 Engine Masters Junkyard 392 Hemi Engine Where the engines are distinctly different is in the head layout. Hot Heads stocks a complete line of gaskets from as well as individual gaskets for your specific replacement needs. Its a 325 poly head offered in the Dodges & Desotos 1957 and 1958 Chrysler ran the 331 & 354 poly head engines 56 to 58 poly was a hemi with a different head configuration the plugs didnt go through the valve covers. For those interested the Hemi 6 Cyl engine was a upright inline 6 cyl motor made by Chrysler Australia for Australian A body cars, Whilst called a Hemi in reality it was a canted valve engine with ball stud rockers. Joined: Nov 18, 2006 We're told poly engines were used as late as the late 1960s in Canadian applications, overlapping with the "other" 318 engines. monc440. com . The easy way to id the difference is that the 'A' engines have an intake manifold that seals the valley. The rocker assembly and push rods appear to be as new, I'm guessing this was the last gasp for this motor and the new rockers didn't help as the rest of the components are worn out. No Poly version Dodge Red Ram hemi 1953 - 1958. To narrow it down a bit, the small block hemi 318-360 conversions were being built in either North or South Carolina and the 2 partners split and the other partner opened up his own shop , builds his own 426 style hemi blocks, heads, valve covers, intakes, etc. 4 Hemi Apache head appeared along with Variable Valve Timing (VVT) and the larger The intakes interchange between Poly & Hemi on the Hemi based Polys. This is a very good book that gets into detail on identifying blocks, The low deck blocks come in both Poly and Hemi flavors. Poly wanna power: Mopar’s Poly V8 Engines 241, 259, 270, 301, 315, 325, 331, and 354 “Poly” V8s. Call for price or trade options. One of the ways to distinguish the difference between a Hemi and a Poly is that the Poly blocks have elongated holes in the decks for the push rods. From the photos (see below) you can see that it's definitely got Hemi Chrysler developed its first experimental hemi engine for the Republic P-47 Thunderbolt fighter aircraft. and his first name is I can get a 1956 331 Spitfire poly engine complete. 3 L), and in various high-power configurations. ) 354 Poly block bored to 3. And In '56, the Red Ram and Super Red Ram were both poly engines. They made a 326 in 1959 that may have been the only Dodge poly with no hemi counterpart. “You want a cross-flow head, overhead valve 301 poly with hemi heads. Ray Hnstray, Apr 25, 2012. Carb. It seems it is easier to get It had the Super Red Ram stickers on the heads engine # D633-53635 Any Thu Jun 10, 2004 9:30 pm. According to Leo Lindquist's hemi data book the D633 for 1956 Dodge custom royals were all 315 poly engines Announcements; ↳ TheHemi. They have oval exhaust ports. The Poly engines (A Series) that came in our Sweptline trucks are a 2nd generation design and are close cousins of the LA family of engines (318,340,360). BBL H. ) The poly engines could be had in 218 and 230 horsepower, while the hemi was rated at 260 (4V) or 295 (2x4V) horsepower. 16 rocker arms for both, of course. Finally the hemi was enlarged to 392 and the poly got the 354. Hemi heads will fit on a poly block, and will work fine. George, Nov 26, 2021. Shine her up and have people guessing what it is! The only diff in the blocks is, the pushrod holes for the exhausts are machined more for clearance on the Poly's, no problems there. I've heard the Hemi engines called Super Red Ram, but in my experience the Super Red Ram denoted a 4 barrel carb, not the different heads. Super Poly Motor; some detailed ideas on constructing a 462” poly motor. This particular Maxx X block is a solid block with water in the heads only. P. 1955 was a 301, 1956 and up had 331's, and 1957-58 you could get a 354 Poly Engine(spitfire). Even in the Hemi's the Families Heads were not interchangeable. Not every displacement was made in both Hemi and Poly versions. All 1951-1958 Chrysler FirePower Hemi engines have a bore center distance of 4. 2 cu in (5. Data Tables; showing all three motor families, bore, stroke, deck Figure 5: TTI Poly 318 A-block Headers (photo TTI) Options Requiring Modification. The Poly engines and early Hemi's are very similar to our over designed LA and big block engines. Chrysler Hemi/Poly = 301, 331, 354 low deck, 392 tall deck DeSoto Hemi = 276, 291 low deck, 330, 341, 345 tall deck Dodge Hemi/Poly = 241, 260, 270 low deck, 315, 325 tall deck. Listed 14 hours ago. 14 hours ago. For rear wheel drive (RWD/2WD) vehicles Hemi Performance presents the Fel-Pro VRS (Valve-Regrind-Set) Gasket Set, designed specifically for POLY Small Block engines like the 318ci "Sawtooth". and 1967 in Canada. Yes, short deck heads will fit on a 392. The P-47 was already in production with a Pratt & Whitney radial The poly 354 can be made into a hemi easily. in the ease of manufacturing. i know you need spacers for 354 heads on 392, the low profile manifold i have fits 301-331-354 poly block and heads, i made spacers to fit this manifold on 354 hemi, i have also fitted 392 heads to 354 hemi and made adapters to fit manifold on, have tried all combinations, if it don't fit make it fit, it just takes a bit of ingenuity, brains or what ever you want to call it. I had even looked at the older Hemi exhaust designs which I would think port design and spacing would be closer than the new stuff. is there a poly motor these can go on without tons of work and is there an intake made only one I found was a two barrel thanx Scott Scotts Hot rods Tacoma wash. thanks the edelbrock p 600 manifold and carbs. or was that a G1 hemi head on a poly engine? hmmm. DESOTO: S17 - 1001: 1952: Firedome: 276: 2: 160: S16 - 1001: 1953: The 57-58 Windsor and Saratoga engines are 354 ci, have Spitfire (poly) heads, and is similar to the shortblock of a 56-354. by David Zatz. Or is it just a difference between the drilling for the 315 poly and hemi bolocks? Apparantly the 315 hemi head had intake valves that were about 0. Jump to Latest I have a complete 1955 Chrysler 301 poly head motor I want to change the heads to 1955 Chrysler 331 hemi heads. 331,354,392 Early Hemi parts for sale. Is this a poly head or hemi head? The spark plugs do not go thru the valve covers but are outside I would recommend you use the casting number 1731703. 5:1 check out the link below from webrodder engine forum, lots of good info regarding early Dodge hemi heads particularly on the fitting of low deck 241 & 270 dodge hemi heads onto a hi deck 315 325 Dodge block as was the case for the webrodder stroker build up For sure not factory stock. I saw an ad for a 1 955 Chrysler Windsor 301 hemi/poly motor w 2bbl carb with 66k miles on it. You can convert a poly engine to a hemi by bolting on the hemi heads and exhaust. Poly “A” Motors There is no hemi motor based on the “A” series poly motor as used in Plymouths 1956-67 and some Dodges 1958-59, and no conversion by direct substitution is possible. In 2003, the 5. Get a set of 331/354 Chrysler Hemi heads and build a unique street engine. Rusty O'Toole , Dec 23 Your 63 motor will let you run LA transmissions a poly is more like a hemi than I was thinking about putting an early engine with the poly sphere heads in it. Below a picture of the Hemi beater, the Hinkles 426ci Poly engine. I. it will also take any 270, 315 or 325 hemi heads and all valve gear. A while back there was a thread “. The earlier Poly engines did have the ability to share or swap to the early 1st generation HEMI head. It is a performance motor mount that is soft enough for the street, yet strong enough for higher HP racing applications at the track. Joined: Jan 29, 2007 Posts: 7,310. 00: P/N 90150: 331 (1955) Full Set - Best: $ 229. The block can be fitted with an LA or aftermarket spin-on adapter. Chryslers from that era were modular with a LOT of interchangeable parts between engine and dimensions even shared by other Chrysler products. 00: A hemispherical head ("hemi-head") gives an efficient combustion chamber with minimal heat loss to the head, and allows for two large valves. 73RR. ALL Hemi engines, 54 to 58, had 4-bbl intake manifolds. So what's going on here? Was the 315 hemi head completely differect from the 270 hemi head. Example: 241/270/277 Dodge poly/hemi and 315/325 Dodge poly/hemi have different cams. SHARE For anyone wanting to make their own adapter for the EarlyHemi or Poly(Hemi block) engines I'd be happy to give you/them all of the Hemi block dimensions The 'poly' engines from Dodge (241-270-315-325), DeSoto(Dodge 325), Chrysler (301-331-354) and 55-56 Plymouth (Dodge 241-259-270) are all based on the Hemi engine design and can be converted to Hemi. Received 9:1 or 8. The first version of the FirePower engine had a displacement of 331. I have herd they may have changed the casting some. The original, 1951 Chrysler Hemi V8 is an engine with enough logic behind it to be understandable to people (like me) with limited understanding of the internal combustion engine. (The poly engines were designed to emulate Chrysler’s hemi-head layout at reduced cost. They were called FIREDOME & FIREPOWER in the Desotos Jester Good: the 270 has the best poly head of the Dodge low decks (vs. The smaller engines were dropped for the 1958 model year to simplify parts inventories. The build utilizes the new INDY Maxx X block and INDY’s 426-1RA CNC’d 295 Hemi heads. So far, the cherubs have broken the iron rocker shaft towers, the iron intake manifold, the iron cam sprocket, and one main bearing cap (they are teenagers with zero experience, this is just the way it is. Top. Early HEMI engines could swap heads with the Poly’s. 276, 291, 330, 325, 321. We also carry special copper head and header gaskets for Chrysler. Ad states you can switch out the 301 heads and put any early Chrysler heads and rockers such as the 331, 354 and 392, its the Heads for each motor were different . any info or pictures will help. The LA engine features ordinary As stated by others above, the poly engine can be identified by the code stamped into the block. how much power could this engine put out and could it live up to its brother the hemi. 3,909 likes · 1 talking about this. My research concludes that it can and has been done, but no real info about it. $7200 for a of heads will keep them from ever becoming very popular. Coupled with the brand-new Mopar Performance 4-inch stroker crank for the LA 318/340 motor (PN P5007256), which is interchangeable with the Poly 318, this combo would thus yield a 4-inch bore by 4 Example: 241/270/277 Dodge poly/hemi and 315/325 Dodge poly/hemi have different cams. Walton Bch A 392 intake will not fit on a Poly motor with hemi heads. But just for s---s & giggles, what Hemi heads would interchange? Your Early Chrysler Hemi Headquarters! Hot Heads Research & Racing, Inc. Bore The timing-case cover on the earliest Dodge and Chrysler polys are similar to the early Hemi engines, Due to the design similarities, pieces from the early Chrysler 301-, 331-, and 354-inch poly-head engines and Dodge 270-, 315-, and 325-inch poly-head engines can easily be interchanged with early Hemi parts to create a Hemi engine; The poly 318 won't accept hemi heads, only the late 50's poly headed Dodge, DeSoto and Chrysler engines could run the hemi heads. 800” crankshaft (hemi or poly) by reducing the main journals to 2. ” and the discussion got around to whether Chrysler Poly (Spitfire) heads could be swapped onto a HEMI block. in reference, is the design of the cylinder head. Early Chrysler Hemi Intake Manifolds, Blower Manifolds, Electronic Fuel Injection Hot Heads, Weiand Burst Panel Kits, Carb Insulator / Spacer Carb Intake Linkages, Carb Adapters Carb Adapter Plates, Carb Assemblies. They used the same manifold and carb as the previous year's hemi. Rumor is that the Windsor blocks are prone to core The valve covers read Super Red Ram and of course I didn't look at the engine ID number (its still at my clients house across the valley) but have done some reading on the net. While this was an efficient system, the valvetrains were slow and expensive to build; and Chrysler quickly realized they needed a cheaper, higher-volume The Dodge poly motors and 1955-56 Plymouths using these motors can be converted by using Dodge hemi parts. Chrysler needed a V8 to put in their small cars, and assembly line installation of a poly into an A just wasn't practical- so they went with the LA and dropped the poly. You can also put Chrysler Hemi heads on a Chrysler poly block as well. 270 D55 Hemi Engine . The only reason for the head was to reduce manufacturing, maintenance, and repair costs. Joined: Jan 1, 2005 Posts: 7,836. 460” bore centers as the poly “A” motor, and may be a possible donor for a new header. Some have water outlets in the front of the head some don't. Unfortunately not much hop up Heres what I've got: a 1955 chrysler 301 poly motor, complete, I have access to a pair of 1955 Chrysler 331 hemi heads, rocker arms, head bolts, a four barrel intake. However, a hemi-head usually allows no more than two valves per cylinder due to the difficulty in arranging the valve gear for four valves at diverging angles, and these large valves are necessarily heavier than those in a multi-valve engine of Each of the original Hemi/Poly engines had both a low-deck and a high-deck version. It is very simple to do just swap heads and push rods from Dodge to Plym poly. Chrysler,Dodge and Desoto early Hemi, what interchanges. With fuel injection, the deck height is of no consequence, as the throttle bodies are not connected. It was produced in the 318 in size 1957 to 1966 when the 318 LA engine was produced. But, the 318 isn't a bad motor on its own. Chrome pretty much all gone & weeds everywhere, so I couldn't be sure which of the two years. 354 Chrysler poly 4bbl motor, heads, cleaned and magged, resurfaced, new guides, pump core, crossover, pulleys, oil pump core, starter, exhaust manifolds and tranny adapter plate, basically a complete engine. This type includes the Chrysler, Dodge and Plymouth “poly” motors (331, 270, 318, etc. Generation 1 Hemi and Hemi-block poly interchange. Details. The "poly block", was not, it was the "A" block with polyspherical heads. Back then Chrysler, desoto, and dodge Made their engines in either hemi or poly head, but no hemi head for Plymouth. Hot Heads Research & Racing, Inc. The hemi was the D-500. Dodge and Plym were the only one's to interchange in the 50's. from The A engine with Polysphere heads was a way to get cross flow breathing like a Hemi in a more compact, less expensive to produce package starting in 1955. HEMI Tech- Gaskets HEMI Tech- Block, head, porting/polishing, gaskets, mounting HEMI Tech - Engine and Component Dimensions HEMI Tech- Transmission adapters, flywheels, starters HEMI Tech- POLY Tech - early poly motor info HEMI Tech- Rebuilds HEMI Tech: Machine Shop Reference by State List of poly 318 engine parts numbers for polyspherical Dodge, Plymouth, Chrysler 277, 301, 303, 313 While head bolts are produced with extremely tight tolerances, a reduced shank, and a shoulder on the head, a quality Grade 8 bolt is a suitable option Gen I Hemi/Hemi-block Poly: FelPro 70522 Fiber Type WARNING: Do not use the rubber The Windsor never came with a hemi engine, using poly heads through 1958. The 1958 cars and trucks had simpler choices than the insane 1952-57 model years: 230 six, 350 or 361 B V8, 392 Hemi V8, 318 A-V8, or one of the final poly V8s. Missing intake manifold, valve covers and oil pan. from Ft . The 318 Poly engine in question is part of the “A” series engine. SHARE POST #14. The lower edge of the valve covers are wavy instead of a straight edge. The Dodge 241, 259, 270, 315 and 325 engines as well as the Chrysler 331 and 354 were all available as a Hemi or as Poly engines. (*Note* - Chrysler even produced some 331 and 354 "poly head" engines - mostly used in the Canadian built Chrylser The “Poly” engine had hydraulic lifters and came with a two-barrel carburetor, as standard equipment. ) In 1956 Plymouth began production of a new series of wedge head motors. It appears to have the same 4. Ran onto a complete '57 or '58 Chrysler with Poly engine, everything but carb & air cleaner. Dodge polysphere hemi block with poly heads. The very term "poly" that defines the whole eng. I recommend it because the bolt pattern will allow the direct use of a small-pattern AFB carb. from Peoples Republic of Your 270 poly will accept 270 hemi heads without modification. ive also got a 2-4barrel intake from a poly engine the casting number is 1822004 any idea whate this fits thank you . These and the Hemi & Poly Motor Data: Motor: Year: Size: Bore Size: Deck Height: Rod Length: Stroke Length: Maximum Com. SHARE POST #12. See list of parts and pictures. Plymouth fits plymouth and Dodge fits Dodge in their early distictive own poly engines. The A engine was built through 1967, actually, with 1966 being the last year in the U. 1955. Any help or advice is MEGA porting greatly received from PolyJohn. I have both a 331 hemi and a 354 poly and am planning on making the 354 a hemi with these parts. . Used - Good. 58coupe - 2014-06-05 9:17 AM I was under the impression that the 392 piston had a shorter piston pin to deck height than the 354 because of its longer stroke and therefore would give you less compression when used in the smaller engine. Your Charger has the later model 318 LA 2 bl engine that was the standard V-8 in the 68 Dodges. Replacing the lifters w/o also replacing the camshaft is an iffy proposition. The blocks are the same as the corresponding hemi. Hi, am new to the groups aquired a bunch of Hemi heads from an old machine shop that closed their doors, anyways ran the number on a pair of heads 1635779 Desoto 330 . I know that hemi heads will fit this block and was wondering what heads I need to look for as there is so many different early hemi heads that were different from chrysler, 58 Dodge Coronet had the 325 Poly engine. The XIV-2220 was an inverted V16 rated at 2,500 hp (1,860 kW). Once you get to the A318 poly that came stock in our trucks you're outta luck, the block is a whole new A318 poly cranks are interchangable with LA motors so yes the stroker crank could be used in a poly motor but the trick is finding someone to build you a set of Hemi pistons will also have to be used. Adams & Smithberg Early Hemi at Engine Masters Challenge 2017! Revised SCE Gaskets Early Hemi Gaskets; Officially a Authorized Hilborn Injection Dealer! Chrysler Poly & Desoto Hemi CNC Programs; Unfortunately, lots of people voice opinions without knowledge or experience. The poly head was a cost-saving design. So a Dodge 325 Red Ram V8 could be a poly head or a hemi head. •Intake manifolds do not swap between short deck (241-260-270) and tall deck (315-325). 315 Block . Hemi heads will bolt right on to a Poly block (also known as a Windsor). The LA (Light A) started as a 273 for 1964, same basic block architecture but a lighter casting, with simpler inline wedge heads and manifolds similar to the B engine. Save. 301/331/354 poly/hemi and 392 hemi have different cams. The Dodge Poly valve cover is different from the Chrysler (shown below), Would a set of headers for a Hemi fit on the poly heads? Also, would a set of valve covers for a 318 poly fit onto the 315 heads? hotrod_hooligan, Dec 19, 2008. The low deck(241-270) Dodges all have the same stroke. I believe you will find the '56 Super Red Ram is a "Poly" head, not a Hemi head engine. I heard once years ago, with very little mods, you can make the HEMI head work on a B/RB block. The Chrysler poly/hemi engines with interchangeable heads, were actually decades ahead of the competition for their time, in that they had both canted valve and hemi heads that interchanged on the same block. worth a shot to investigate it. 2 brl intakes - 241/270/315/325 One of the engines in my arsenal of engines for my Mechanics Students to rebuild is a Semi-Hemi 318. It is the same engine family that includes the 340 and 360 EarlyHemi and related Poly Engine ID codes. Developed from Chrysler's aviation research, the efficient powerhouse had roughly hemispherical heads, opposing valves, and a complex valvetrain that And the poly block's pushrod holes are not completely covered by the 270 hemi heads. 75 3. You can turn any poly block into a hemi as long as you stay in the make. Complete engines can ship via Fastenal for around $250. It began to be replaced by the wedge-head LA engine in 1964, and is not related to the hemispherical-head The 318 Poly, from '57 - '66 doesn't have Hemi heads that swap off, nor does any other motor from the A family, which includes: CID Year Bore Stroke 277 1956 3. Source: American V-8 Engine Data Book Mopar Poly 318 head work. 1950s Dodge Poly Head Engines Image 5. In 1956 Dodge passenger models, the standard V8 was a 270 poly. There are differences between the A & LA engines. 1 inch bigger than The poly heads (which were actually quite good for their day) cost more to produce than the LA variety, kind of like the situation with the Hemi vs. The early Hemi heads (1951-59) will swap onto an early Poly block (up to 1958). 241, 259), and takes the 270 Super Red Ram hemi 4 bbl. The heads were the main difference and although I suppose it is possible the exhaust ports were the same, it is more likely the poly head ports were different. If the original pistons are used, the motor Look at the other 'poly' (canted valve) head designs in the other 2 of big 3 and it's usually their highest performance engine (unless it was a hemi). The export 313 cylinder heads on the “Full-premium” engine (usually found in heavy trucks) has oddball 18mm spark plugs and slightly larger valves than the other A-block cylinder heads. Joining cylinders at the port would be no better than the poly log. question can i stuff my 331 Your Early Chrysler Hemi Headquarters! Hot Heads Research & Racing, Inc. 7 Hemi Eagle and 6. Contact us if you need assistance identifying any of those blocks. I'm making a 301 into a hemi with 55 hemi heads. Which is the reason heads and manifolds cannot be swapped amongst the four right from the get-go. The 392 heads will not work unless you use log intake Even the poly engine parts don't interchange well, if you had a Dodge poly & wanted to use hemi heads you had to use heads from a Dodge hemi, couldn't use Chrysler or Desoto heads, Plymouth never had a hemi (until the 426 & that was shared with dodge). Remember that since this moves the heads down and closer to each other, 331 or 354 “poly” motor - it may require re-balancing, Origin and development of the DeSoto hemi motor. Your jackpot journey Chrysler Windsor 301 hemi/poly motor - Can you put on Hemi Heads? Discussion in 'The Hokey Ass Message Board' started by stevilknievel, Sep 18, 2007. 12 hemi head casting number 1327373-1 can anyone tell me whate size hemi these are from. 1 cu in and produced 180 HP. The '54 and '55 331 heads are far superior to the 392 heads. manifold. 25:1 compression pistons, steel-backed babbitt bearings, standard timing set, standard volume/pressure oil pump, 4-quart oil pan (1956 – 1958 received a 5-quart oil pan), The latest and most comprehensive is the Chrysler Hemi Engine Manual by Ron Ceridono, which I highly recommend. The later poly engine is still a decent engine, not all that much high po parts out there for them but still an attention getter, most poeple probably won't know what kind of engine it is. Same engine is also used in some 1955 Plymouths and 1955-56 DeSotos. , a 270, 315, 325, 331, or 354 Poly was a Hemi with poly pistons and heads. George. somethin about not using the bolts that go into the head from the valley(?), clearancing the pushrod guides(?). 392 Walker's Hollow Trail Lowgap, NC 27024 Phone: (336) 352-4866 Fax: (336) 352-3892 E-mail: info@HotHemiHeads. If you find a 331-354 Poly any intake for the 331-354-392 will fit, 4V, 2X4, 4X2, 3X2, 2X2, single log, twin log, ect, many choices! Also the cam is the same on the Hemi based engines so plenty of choices if you have a Chr. The first engine released by Plymouth in 1955 was the Dodge block of 241 inches, which was designed to use both Hemi and Poly At some point in that era Dodge began building some truck engines with hemi heads and also with poly heads. The Chrysler bore spacing is larger than the rest of the Hemi's and Poly's. This manifold was used on the 1957 and 1958 engines with a four barrel carb - 392 hemis as well as the four barrel equipped 354 poly engines. The engine also features a raised 55mm cam tunnel for a 55mm COMP Cams camshaft with a 4/7 swap. That engine was bumped to 318 for 58' in the Plymouth, and the dodge version went to 325 in 57', both as a hemi and poly. , etc. riceman, May 13, 2009. In Chrysler’s hemispherical-head V8 engines, each cylinder had two big valves operated by twin rocker arms. The VT-338 Use code was used on 241 hemi Dodge truck block & on 259 Polys. In 2009 and 2011 respectively, the 5. For starters, was this about a 325-CID? Second, I know a lot of guys like the Poly AS IS. Dodge Low Deck Strokers (241, 270) There is no commercial crankshaft available for the low deck Dodge motors, but it’s possible to use the longer-stroke 1956-58 Dodge factory raised deck 3. Dodge Hemi heads will work on Dodge and Plymouth poly blocks. (different bore and stroke than Plymouth) they weren't the same engine. They have a lot of undeveloped potential. Like I have a 1957 Dodge 325 Super Red Ram poly engine I have access to a complete 1955 Dodge 270 Hemi top end Hemi top end will bolt onto the 325, but valve sizes are smaller on the '55 Hemi heads, than what a "real" 1957 Hemi 325 would have is the only difference the valve sizes, or did the 1957 D-500 Dodge hemi 325's also have larger PORTS First gen Poly (up to 1959) yes, Early Hemi heads will fit. Will the 325 Hemi heads fit on a 325 poly engine, Ive got a D500 car with no engine - the parts car has a good running 325 poly head engine Id use if I could change to hemi heads: d500neil: Posted 2015-04-26 4:04 AM (#476638 - in reply to #476632) Subject: Re: hemi heads on poly block: There wasn't that much difference in HP, the 1956 331 Chrysler Windsor poly with 4 barrel was 250HP, the same block with hemi heads in the 55 New Yorker was. There's the early hemi based Poly & the later "A" Polys. My The poly 318 won't accept hemi heads, only the late 50's poly headed Dodge, DeSoto and Chrysler engines could run the hemi heads. I have not tried it, but I have heard The Polyspheric or Poly engines were V8 engines produced by Chrysler from 1955 to 1958 as lower-cost alternatives to the Hemi engines. These numbers are stamped on the top front of the block, on the machined surface, just ahead of the valley cover. The low deck blocks come in both Poly and Hemi flavors. Lets all get together and buy, sell and trade Early Hemi engines and parts. All were 315, as you said. wedge BB heads. Although this list seems extensive, it is not guaranteed to be complete, nor is it warranted to be free from errors. Poly, not so many if Dodge based. from Southern Michigan. DeSoto Poly Motors Although “wide-block”poly motors were used in lower-priced 1955-58 DeSoto models, they are Dodge engines based on the Dodge hemi motor. The lifter and cam lobe wear together into a non-separable unit; replacing the lifter on a used camshaft will cause accelerated wear in most cases. SHARE POST #1. 7 Hemi received the first, followed in 2005 by the 6. There's a '55 Chr 301 & the '57 Plym 301 "A" Poly, different engines. 5 L) to 325. Ok will this 57 Desoto engine accept any Hemi heads? Any Chrysler polys accept Chrysler hemi heads, Dodge and early Plymouth polys will accept Dodge hemi heads. Piston selection will be critical and possibly even require a piston There are no hemi heads that will fit the 318 block. Joined: Feb 1, 2011 Posts: 270. George, Nov 27, 2008. This is probably a stupid question, but would a 318 poly engine head fit on a 318 LA engine, and if so would it be worth it, i dont know really that much about the LA engine heads but i always hear about how the hemi or poly-spherical heads are very efficient, but was it just for that time, or were they still really good, just more expensive to produce or what. Early Hemi heads WILL NOT fit these blocks. ), Chevrolet big block (396, 427, 454, etc. These engines were based on the Hemi engines, using the same blocks and crankshaft parts, but completely different cylinder heads, pushrods, exhaust manifolds and pistons. The earliest heads, the one's with round exhaust ports are usually not used, few people like them. Profile Page. Piston valve reliefs were a n different spots. SHARE POST #8. I can also get a complete 1953 331 Hemi top end. Optional was a 315 poly and 315 hemi Hemi head bolts must be used. 250HP. ), Ford Cleveland & Boss small blocks (302, the hemi head Next year the hemi was enlarged to 354 and the poly got the 331. I think the most modern Poly The “Poly” engine had hydraulic lifters and came with a two-barrel carburetor, as standard equipment. THAT engine is a HEMI via the valve reliefs seen. The poly A engine does not have a hemi head made within its vintage, but it shares bore spacing with the LA engine and the new hemi. It was The poly head design was better for performance than the wedge head, but not as good as the latest performance heads. We offer cylinder heads "out of the box" or custom ported to your needs, we can help you choose the perfect camshaft for your combo from our own, custom designed cam series then help you pair it with the best intake manifold so that your new older poly engines essentially, Hemi engines with modified combustion chambers and single rocker arms Not too accurate, the entire head casting and all valve gear is completely different except for head bolts and water, and again confuses single rocker arm with single rocker shaft. 315/325 water pump housing and water pumps . In hopped up or racing form the larger exhaust valve and better combustion chamber shape of the hemi would give an advantage but in stock form there wasn't much between them. It is common for the later Poly blocks to have core shift. If they'd cut the price and offer a pair of heads and a manifold as a package for around $2000 to $2400 or so max - ie - about the price for comparative aftermarket head and manifold packages for most other engines, they'd probably sell a bunch of Nothing wrong with the Poly heads, so don't get too disappointed if you can't find some Hemi heads. The “A” poly motor is very similar in design The 301 Poly was a Chrysler engine- basicly the same as the 331 and 354 Chrysler hemi, but with a smaller bore and poly heads instead of hemi heads, so an interchange to hemi heads is fairly straightforward. The US-built 1967 LA 318 has engine number prefix C318 while the Canadian 1967 poly A 318 has engine prefix CC318. Daimler Hemi dimensions are welcome as well! scootermcrad, Jul 8, 2011. Intake manifold should bolt up as physically the two blocks have the same dimensions. The bellhousing pattern is the same though 241-260-270-315-325 this includes the 57 DeSoto KDS which is a 325 Dodge Poly. This high-quality gasket set by Federal Mogul is a must-have Chrysler Poly blocks are bolt ons for the most part. NO Plyms Had Hemi's until the 426. The 1635729 casting on the block translates to 270 Hemi per my database. It is stamped on the passenger side, •All Dodge heads swap around, Hemi to Poly, but you need all of the Hemi related parts. One of the main specialties at this shop is cylinder head work. You also have the problem of bore centres - the distance from the centre of one cylinder to the next. But can be converted to the standard head Chrysler. The 1987-1996 Dodge Dakota RWD High Performance Gen 3 Hemi polyurethane motor mount is designed for street, street/strip, and drag strip applications. ) The trusty 230 CID L-head six was still available, boosted to 117 hp. "Semi-Hemi" Polyspherical Head V8 Engines: 241, 259, 270, 301, 315, 325, 331, 354 with thanks to Bill Watson and Hemi Andersen Chrysler's first V8 engine was the "dual rocker," now known as the original Hemi. 315 ci, IIRC. NOTE: As always, lets keep this limited to first generation Mopar Hemi and Poly engines. QUESTION: Has anyone here done a conversion of this type or have knowledge of such a conversion? Save Share That is an interesting engine. Powder coated black. The poly block has a shorter deck height, same as the 354 hemi. Share. 030” is acceptable and probably . Plymouth poly 1956- 66 - no hemi version. The later poly engine is still a decent 1955-58 Dodge 241, 259, 270, 315 & 325 poly motors can be converted to hemi by substitution of hemi parts using Dodge parts only. Not really any weaknesses, other than stated above, lack of High Performance parts and being overshadowed by newer engines. DeSoto used the same engine but just used the Poly heads, It is possibly the previous owner installed the Hemi heads to increase power. The Hemi head engines were also known as Red Ram, the blocks are the same but the heads and pistons are different. S. Tex Smith's excellent book Hot Rodding the Hemi covers this in detail. vaofoboyvcmxqoijvvygegdtwbarzarvpiycmnqvpsmoffzowe