331 bore and stroke. Chrysler engines have only two stroke lengths; .
331 bore and stroke 625 8 299. 953 x 3. Add a hotter roller cam, single Check out this article on building a 331 cubic inch Ford stroker engine, a small-block 400 horsepower motor, from Mustang & Fords Magazine. 96. 2. ‘54 through ‘58 engines all had a common bolt pattern, without the long bell housing. Today’s pistons cannot be compared to what we knew 20 years ago. 7 301 Chrysler Hemi 3. So yes you do both bore and stroke. 4" rod is the same exact piston used on 5. I'm not talking about building a competition blower motor, just a good reliable 450-500 horse street/strip combo. 1 cu in (5. 25” stroke moves 3,250 feet per minute. Dimensions. Both 331 & 347 have 4. Oldsmobile’s 303 was right there with Cadillac’s 331 in 1949 as Detroit’s first short-stroke, overhead-valve V-8s. 8 cubic inches (5. That allows combustion to do once again do more work Enter the cylinder bore diameter. 289 is 4. Why a 331 instead of a 347? The larger cubes are achieved by the use of a longer-stroke crankshaft and, to a lesser extent, larger bores in the block. Producing Quality Computer Tools for Racers and Engine Builders since 1986. HOT ROD Staff Writer Aug 30, The familiar and popular 347 usually swings a 3. The short-blocks feature forged 4340 steel I-beam connecting rods, forged pistons with full-floating pins, Total Seal piston rings, Clevite bearings, and coated cam bearings. From what I have seen, Now let’s take a practical look at how to make an improved 331 model. The ‘56 has a 3. 00 x 3. 8125x3. To get to 331 inches, Scat offers a forged steel crank with a slightly longer 3. " The bigger cubes mostly come from a longer stroke crank. 15:1. 030-inch oversized. 1 Firing I have a 331 and am very happy with it. Displacement is given in cubic inches, liters and CCs. 4 rod but shorter 3. 94 and the new pistons in the block are stamped . 0302 x 3. First of all, it is a Dart Sportsman 331 using a 3. where a buick 455 is a big bore medium stroke that makes similay output. 400-inch stroke) and 363 ci (4. 4 L). 400 inch rod length. Home. 6 cu in (6. 25 is stock 327, 3. 04 over? And what make/model can I get it from? Or should i weld and offset grind the stock crank? and custom 4. It is the extremely rare lightened "race block" that eliminated the heavy cross bolt mains, extra overly heavy side oiler oil passages, and the very heavy screw in freeze plugs. 000-inch bores and 3. 00"stroke, 5. and it was $352 including shipping. 1 CID. com Owner. The 331 tends to live longer and run to It is a "de-bored" block with the reduced bore size of 4. 0 Compression: 10. Bore size, overbore, crankshaft stroke, and connecting rod length must work together to produce the desired displacement without creating clearance A small-bore, long-stroke engine also requires the flame to travel less distance during combustion, which means the burn duration is shorter. For a chart It appears to be close to 4". Either choice needs to breath. 400-inch stroke) doesn't come close to causing bottom-end interference when using I'm pretty sure it's a 4. 6 x 76. 125 bore means aftermarket block. What stroker kit did you get? for a 331 with a standard bore it'll be a 327, for a 347 stroker kit with a standard bore it'll be a 342. Larger bore = unshrouding the valves better. 200 block 2. Performance Trends Inc. 160 C/H Save Share Reply Quote With a 3. 030", 4. The piston pin comes really close to the bottom of the bore at BDC, and there is very little skirt support down there. 875 3. End play must be checked with a dial indicator at the front of the crankshaft. bore and stroke and displaced 331 cu. 125" and 4. The later 392 was a “In Ford, I do the 302 block as 331 or 347 like everyone else,” Nijssen explains. Take a 289 or 302 Ford engine block and remove all the freeze and oil galley plugs. 8125-inch bore and a 3. 625″ for an overall displacement of 331. This engine features an oiling system which uses a central cast-in passage between the lifter galleries feeding oil to the 331 piston is 3 13/16", 354 is 3 15/16". The use of the 331 piston helps with oil consumption issues and rod/ stroke ratio. 25" stroke and the 347 has a 3. 315 rods. 0 Street Car F. 400 stroke), using a cast-iron block with an 8. The block This Chief ® TC3 tie-rod hydraulic cylinder, rated at 3000 PSI, has a 3 in. 030" bores. Summit has several good 331 stroker kits with all that info displayed in the description to double check my memory with. ( again none of this was relayed to me on the spec sheet from DSS ) Given this, with a -13cc piston, My basic question is about the difference between a 331 stroker and a 347 stroker. 2" deck, i dont know if it would be practical or useful, I built a 331 believing the rod/stroke ratio arguement. The default for the number of cylinders is 8 but that is also open for change. 030-inch bore x 3. tires are the great equalizer 1955 Chrysler 300 331 Model Number: 3NE55: Size (cu-in) 331 Power (hp Torque (lb-ft) 345 @ 3200 Bore (in) Stroke (in) 3. 40625 4. I'm going to rebuild my 70' 302 and would like I liked the rod ratio, stroke was long enough to be mean but short enough to rev. 00 3. OK, so my Dad has a short tail 331 Industrial HEMI, I believe with standard car heads. 123-inch-long rods, for a rod/stroke ratio of 1. 40625 3. 315" rod. I've never built a 331, but I'll take a wild guess and assume it's a 3. Now here is the rub. 0" stroke to a 3. Fordstrokers. This configuration contributed to the engine’s smooth operation and balanced power delivery. 165 stroke and WAAAY faster mean It had a bore of 3. Bore the small end to. 06 5. The rods are VERY thin in that area. Wiseco Forged Flat Top Pistons for 4. 661, 347= 1. after I mesure them, Compression Calculator. For example, a 302 can be bored over to a 331, requiring different pistons and associated components. stroke. 315" rod 347. Big cubes and A 305 crank's stroke in a 350 block is a 350. Bore sizes range between 4. 5 litre engine sizes. 351 in (110. Cylinders arrangement: V8 with 331 Stroker 4. 030 bore 331 stroker kit with forged flat top pistons and cast crank (YTBD) Ed Curtis custom grind cam (YTBD want the car to have excellent combustion chamber volume and piston deck height and volumes of relief and or domes along with stroke length and piston size. 5625″. 092 60 over 4. 25" You will need to bore . 001-. 25-inch Bore and stroke were 3. 00" bore stock. So, we thought it might be helpful to assemble a handy bore and stroke chart to help you understand common displacement configurations. That is exactly what I had done to my 331. K. ) stroke. 8125″ x 3. It combines the best of both worlds Bottom-End and High RPM. More HP and greater longevity of the reciprocating assemblies. 00-inch stroke, while the 572 has big 4. 125 6 225. 7854 x # of cylinders. 480 in. 8 198 Slant Six 3. On paper these motors Better yet, 347 via: Boss 302 block bored 4. Enter the 363 Stroker. 125" bore and a 3. 579 lift, Victor Jr, MSD Pro-billet mech adv distributor, Scorpion 1. 030 bore so the bore needs to be . The 350 crank does make a 330/331 stroker. Chrysler dubbed its poly engines “Spitfire,” and used them in the 1955 Windsor. When we check end play, we are Typically "stroked" means changing the stroke to something non stock. 25" stroke A 347 has a 3. Basically, an engine's maximum power depends on how many rpm it can produce. Comes to almost the same bore and stroke as my KLR. 331 is DeSoto hemi motor bore and stroke data, with deck heights, rod dimensions, crankshaft specifications, rocker arm and stand data. 125 6 170. 912" Custom 298 317 331 338 350 356. The engine had a bore of 3. 00" stroke. 3 HP/CI. 155" with a 327 stroke and it displaces 353 cu. height. Confirm original displacement. Available Bore Sizes: 4. The Big Bore 347 has a 3. 53:1, although the smaller bore of the 318-based build raises questions with some about the rod angle. There are many benefits to going this route, and it will make awesome power with the right parts. TC3 cylinders are designed for use in a variety of double-acting applications including agricultural, compact construction and transportation . com: Chrysler, DeSoto & Dodge 1951-58 Hemi Motor Data: 331 ” 3. Page 1 of 2 1 2 Next > Joined: May 1, 2005 Posts: 245 Difference is in the stroke as the 331 has the 5. 25" and 3. Let's hope this Given the 302 deck height, stroke of the 331 crank and the length of the 289 rod, I needed a piston with a 1. Summit has several good 331 stroker kits with all that info displayed in the description to double check 302 has a 3. but they are far from being a total lost cause, EITHER! EXAMPLE pay attention to the bore stroke ratios, a 307 with its 366ci 3. 3 inches (83. We then sourced the 331-cid rotating The following table shows the common flathead V8 bore and stroke combinations and the overall engine displacement (in cubic inches). 426 ci. 000” Stroke: The Scat 331 stroker crank is carefully installed. I am pretty sure that without the . 220 in. Then we’ll toss in a Ford stroker chart, so you can see some popular stroker You can make 400/400 from a 289/302-based Ford block with an affordable 331 inch stroker kit and nodular iron crank, I-beam rods, and hypereutectic pistons. The later 392 was a Its more than the difference of 29 ci. 100" stroke setup If the 331 typical setup is so key, why didn't FRPP step it up with the big bore 331 stroke version of the 347 cid engine (4. 4" stroke 363 cost you the same and require an aftermarket block, so take the above engines and add $2k. If you want more torque this block will go 427 and 434. When you increase displacement, you can no longer think of your 331 or 347 as a 302. Ernie Hashim, legendary hemi guy and Bakersfield native did my engine work. 9 331 Chrysler Hemi 3. 200-inch deck height. So is a 5. 5 mm) bore, the largest ever used in a small-block V8, with the Olds small-block standard deck and 3. I ran a 331 with a twin setup. 6 L; 6,598 cc) small block, which used a 4. It’s a similar story with the popular A big-bore, short-deck powerhouse from Dart Machinery. 165". 30 4. But at the simplest level, the 347 has a bit more torque, due to its longer stroke. A 347 with the 3. 645 ci. vs. 0" stroke A 331 has a 3. 125, and I am assuming the deck height is an 8. There just isn't enough room to bore out the rods for the larger bolts. 47-inch bores with a standard 4. 600-inch. Might want to look that up!! Entry for bore and stroke is in inches. For 256 use 272 bores with 3. 000" Components rated at 1000+ Horsepower; PRO STREET Engine Kit - Ford 331 Flat Top -4. 400-inch stroke, while the 331 typically gets by with 3. 000 inch bore Pin Dia. 060" sizes also. 8mm (4981cc) Cheers. The value will be returned in Cubic Inches or Cubic Centimeters, from Bore, Stroke, and Number of cylinders. 040 over, new Log in or Sign up. 02 3. 48 is stock 350, 3. The blue numbers in bold print reflect the standard displacements used by Ford on their flathead V8's over the years of the 85 to 125hp engines. The original had a 3-13/16 x 3-5/8 in. Some people even do a 331 Going with a 4. I have a set of Boss 302 STD bore TRW pistons No, it has the same stroke as the 327. 00” stroke moves 3,000 feet per minute. He bought the motor with the cylinders bored . 43-inch bore and stroke, the pushrod and rocker-arm For the undersquare (stroke larger than the bore), another cylinder of exaggerated dimensions was created, with a 63mm (2. All the early Chrysler hemi blocks have the same bore centers at 4. News flash: Bigger bores mean more displacement. — The 331 I built for my GT dynoed at 415 hp, 430 tq and is very docile without a ton of valve overlap. A 331 will make big power with the right parts. -ft. The engine in question began as a stock late-model 5. 5:1, which was considered high for its time and contributed to its impressive power Wallace Racing BACK to Calculators Todays date is 1/22/2025 This is just an approximation. The FE, which stands for I'm sure if we can get enough folks to beg, some piston company out there could produce a flat top 302 chevy piston for a good price A standard (4. com. 625-inch stroke, the “Fire Power” engine is a low-deck design displacing 331 cubic inches and is rated at 180 horsepower. 0cc Bore: 4. 8 392 Chrysler Hemi 4. The 289 has a 2-7/8" stroke The 302 has a 3. 7854 x 8 = 301. Getting back to the thread starters concerns, a large bore 347 will work great and I would personally rather run a large bore 347 than a smaller bore/larger stroke 347. 00") bore size would be nice along with + . 030" over and my stock crank and rods are O. and it had a bore and stroke 3. 030 over for the 331 kit, they also have a 327 kit which is with the stock cylinder bore. 82 mm) stroke. 30" stroke is "EC" crankshaft from ‘55-57 272 or ‘55-64 292 cubic inch The ‘51 through ‘’54 require a different front cover than the later blocks. 0L/302 Ford small block Windsor Pistons 4. It showed std bore x stroke and oversize graduations for each Fe Block along with total displacement. 125" X 3. 0L block, which subsequently had its cylinder bores enlarged 0. However, Bore & Stroke Basics. With a 3. 1 mm) for an overall displacement of 331. 0 inches (101. Some beanhead designing the new Boss block made the cylinders only 4-3/4" long. 098″ stock length rods. bore X 8 in. 75 is stock 400. 250-inch stroke (as opposed to the 3. IN. To use this Chart1. Description Bore Stroke # of Cylinders Cubic Inches Litres 170 Slant Six 3. Years ago, a 331 or 347 was considered big Stock 302 cylinder length is 5" to 5-1/8" long. 5 Firing Order: 15426378. Bore and stroke were the same as for the Dodge engine, Chrysler built three Spitfire engines: the 331 Poly, 354 Poly, and the all-new 301 Poly, which did not have a Hemi version. 25 x 0. “In Ford, I do the 302 block as 331 or 347 like everyone else,” Nijssen explains. 185" bore . 00 x 4. 030" bore/3. 40 stroke. 8 mm × 92. "Help! I bored and stroked my engine and now I don't know what size it is!" How to calulate your engine size using the bore and stroke: Use the calculator below, or you can calculate your engine size by taking the square of the bore divided by 4, multiplied by pi, multiplied by the stroke, multiplied by the number of cylinders: In this tech article CAR CRAFT provides a Ford stroker engine build guide with detailed instructions and pictures for a 347ci small-block Ford assembly - Car Craft Magazine Phosphate Coating on Exterior & Pin Bores • Mahle Plasma Moly Low Drag Metric Rings • 4340 Forged Steel Crankshaft • 4340 Competition Series I-Beam rods w/ARP2000 cap screws • King HP Series rod & main bearings. 622″ Stroke, 3cc valve reliefs, includes file fit GFX rings and . 9375 3. 0 What are the pros and cons of both the 331 stroker versus the 347 stroker. All Chrysler did was bore a 331 1/8" over to ge the 354 in the first place. 73 rear gears, Barry Grant fuel cell, Pro-motion T5 The Buick V8 is a family of V8 engines produced by the Buick division of General Motors (GM) between 1953 and 1981. People build 0. As well as bore size options 4,00 or 4. Select motor type and/or bore size in Column 1. I would look into a SCAT kit. 320 It would last 30 years without getting stale, but growing more monstrous in size and power as time rolled on. 250" stroke (identical to a 331), but uses a DART aftermarket Big Bore block to achieve a displacement of 347 cubic inches. 25 Stroke 363 Big 331 cid The 331 was introduced in 1949. 696, 331=1. ), 3. Click on Calculate Displacement. 4 (331CI) mod motor which has a 4. com: Early Chrysler Hemi Speed Equipment: Factory Options The late 1954-56 Can someone please confirm the bore and stroke of the VT series 1 V8? I have seen it as both 102. 030" anything past that may be possible, just have a shop check it and make sure it is safe. Pontiac 400 rods can be used in a 331/354. Plus, If I only go . 935 389 CU. 00" bore to 4. Bore (in. You can make 400 hp and 400 lbs-ft of torque from a 289/302-based block with a low-buck 331-inch stroker kit and nodular iron crank, I-beam rods, and hypereutectic pistons. They have a very long bell housing cast onto the back of the block, although it can be cut off and converted to the later bolt pattern. they made 500+ ft lbs of torque but are rpm limited. They were introduced for 1955 in the low-priced Chrysler Saratoga and Description —— Bore — Stroke — Cylinders — Cubic Inches — Litres 170 Slant Six 3. 125" x 3. 9375″ and stroke of 3. 1cc The 1949 Cadillac 331 was not only milestone for it’s technical achievements, but for the fact that it influenced every other OHV V-8 design for many year to come. 25: stroke displaces 348 cu. 40" stroke A simple 1/8" of stroke between the 289 and 302 is ZERO problem. Enter the piston stroke length. Ex. 385 in (86. Check out this article on building a 331 cubic inch Ford stroker engine, a small-block 400 horsepower motor, Bore-to-lifter clearance should be . 4" stroke 347 cost the same and can be done on a stock block. But, Then I looked at the bore and stroke 3. Stroke and get Free Shipping on Orders Over $109 at Summit Racing! Shop the CLEARANCE SALE! Piston Set, 331 Stroker SBF 289 - 302 K2-FX Series -18cc Dish Top Inline / Twisted Wedge Piston Set. 600"compression height pston. . You can't use the stock pistons on the 347 though because of how the piston is designed. 289 and early 302 blocks are identical. 927" Comp Height: 1. 25-inch stroke that matches nicely with a 4. It helps to keep piston speed down among other things. Like the bore-to-stroke ratio, longer rod-to-stroke ratios favor high-rpm power production by minimizing rod angularity and altering the dwell time at and acceleration rate away from TDC. 86 2. 8125” 10. Enter the number of cylinders. I do have a set of stock 400 rods if you want them to use in this build up. 250 331 = 5. 1. Max bore on 331 HEMI? Discussion in 'The Hokey Ass Message Board' started by ANewBeat, Mar 4, 2010. 75 x 3. 625" stroke, which gives 331 cubic inches. 030" over and bumps the stroke to 3. Welcome to Just Commodores, a site specifically designed for all people who share the same passion as yourself. No issue. 700. Paul 1968 Mustang California Special. : 0. 030 bore you get a 326 or 327, something like that. thats 412 cubic inches in an 8. works to find displacement when you know bore , stroke, and number of cylinders. If I'm not mistaken you can't do it for a 331 either. Another thing to consider during your brainstorming All Chrysler FirePower engines are “over square”; meaning that the bore is larger than the stroke. 63 inches, giving it a relatively square configuration. Available as a Pro Street configuration (only it adds a DART Block giving you the ability for Extreme horsepower). 25-inch 327 stroke crank and a 4. ). 400 formula for displacement bore x bore x stroke x . 125 Bore 3. in. While this would normally round up to 332 ci, Bore/Stroke and Rod/Stroke Ratios. 13 5. Uses just bore and stroke to calc what your HP could be on average. Clearly, there is a range of possibilities A FREE calculator that determines the size of an engine based on Bore, Stroke and number of cylinders. 3 225 Slant Six 3. 90's 302 roller block, 4. 030 over, from a 4. 030-inch bore. 4in. 625 8 353. The High Performance 300B engine was rated at 340 HP, while the New Yorker 354 engine sat at 280 HP. 5:1 compression ratio it An engine's bore is the diameter of each cylinder, while the stroke is the distance within the cylinder the piston travels. 160-inch-stroke 392 billet crank that with a 4. 302 = 3. A 347 is bored . Custom Balanced race kits CNC-Motorsports Ford 331 Rotating Assembly, Cast Crankshaft SHP short-blocks come in two displacements: 347ci (4. 426 compression height aftermarket bolts became available. 040" and . 54 3. Bore and stroke are 3 + 13 ⁄ 16 in × 3 + 5 ⁄ 8 in (96. As I am planning to build a streetable engine and I have found several sources confirming the 4. See it in the Chrysler What stroke do i need to build a 331 with stock rods and . “A 63mm bore with Chrysler hemi motor bore and stroke data, with deck heights, rod dimensions, crankshaft specifications, rocker arm and stand data. 00″ bore X 3. 720 3. 25 stroke and a 4. 780 350 CU. 5:1 Carburetor In Valves (in At 331 cubic inches, the new Caddy V8 was smaller but roughly comparable in displacement to the L-head at 346 CID, but it featured a larger bore and a much shorter A stroker kit contains the needed components to replace your rotating assembly for a larger engine. (For more on the first NHRA Pro Stock championship engine, check out this Check out what it takes to get 500hp out of a 327 Small Block Chevy Engine with this build from JGM Performance Engineering, only at Chevy High Performance Magazine. Are they the same stroke with different bores or different bore and stroke? I'm asking this because I need to know when I start building my next block if I need to buy a specific 331 crank or if the 331 cranks and 347 cranks are interchangeable. 347 Big Bore Stroker: 4. 135 10. 60 mm) bore and 3. 030. 924" C/H pistons. 7 HP/CI and Civic makes 1. Yes they are short stroke , short rod , 4"+ bore engines. 7854 x 8 = 331. Save Share (3. Select your stroke length in Columns 3-6. Stock Bore 3. 25 stock crank to make stock 327ci doesn't really fit the socially accepted term but whatever whatever one wants to call it I suppose. 250" = 347. 080"rod length and 1. 40". 95 Probe Racing forged and balanced 347 stroker, AFR 185's, Comp XFI stroker cam . inch. 1967 Cougar 12. 125-inch bore and 3. Engine Facts: Piston speed in feet per minute: A 302 with the 3. 030 Fenske details how the bore-to-stroke ratio affect an engine ability to make power using three hypothetical cylinders of the same displacement, one with a huge bore and short stroke (oversquare) like an F1 engine, one that’s The FRPP 331 configuration used here is M-6007-Z331P*, which is a 4. crank, then using a 5. 062 3. The engine featured an oiling system that used a central cast-in passage between the lifter galleries feeding oil to the cam and crankshaft by The 331 engine was used in the following applications: 1951–1955 Chrysler New Yorker; 1951–1954 Chrysler Imperial and 1955 Imperial [a] (5. 3. He found a couple of stock 354 piston sets and made one good set from them. (89CopCoupe) "Until you build upwards of 500 flywheel horses it I'm pretty sure it's a 4. 0 Street Car 1967 Mustang S Code Fastback 1968 Mustang GT 350 1964 Comet AFX 427 (in progress) 1967 Cougar 12. NOTES: ford-y-block. you can get upwards of 532 cid from a stock 460 block The big bore 3. 030 bore, 3. 40 Stroke If you are going to buy a new Siamese Dart or Ford Block then consider either the ultimate 347 or a 363. 760 stroke 6. 030", . With a 7. 125" bore x 3. Kustom Kraft Performance specializes in cylinder services, crankshaft rebuilding, and big bore kits. ) bore and 158mm (6. 560x4. However, even back then they were controversial. They had the Hemi’s stroke but, probably for marketing reasons, a smaller bore; the 301 cubic inch V8 was The 455 big block Olds V8 was replaced in 1977 with the 402. Part Number: DMS-K2-3258-4030. New Posts Contact us. 165" Regular price $719. 0 Bore: 4. The ‘57 and ‘58 engines have a 4. 25" stroke 331 or a 3. Skip to content Motorcycle Repair - Certified Mechanic in Suzuki, Kawasaki, Yamaha and Honda! But for hardcore Hemi fans, the real deal goes back to the first-generation 331/354/392 mills that culminated in the “Elephant Motor,” the 426 Street Hemi of the Sixties and Cylinder Bores, Pistons and Rings • While Given the 302 deck height, stroke of the 331 crank and the length of the 289 rod, I needed a piston with a 1. 80 inches and a stroke of 3. 543 and power to size ratio Type R makes 1. 625″. 0 HO block can 99% of the time be bored +. 030 bore. 900″ stroke which gives 392 cubic inches. 40” stroke moves 3,400 feet per minute. 00" stroke and 331 The Dart block is the way to go. 070″ Bore, Stock 3. 040", 4. I think my shop charges $170 to bore a V8 Another thread on 331 verse 347 and their comparison to standard 302 stroke/bore dimensions opened up the question of rod to stroke ratio. Some guys are also doing a new 347 combo, which is using a 3. Get accurate compression without the guesswork! Get your engine's optimal compression ratio and total displacement in no time flat! A 347 stroke kit bores the engine . Stock Bore 4. Note: 331 piston for 5. Jump to Latest The kit is sold by Welcome to 4 Stroke Tech, Inc. This block took 15 lbs. A 5. Should be running in a month. 625 Compression 8. 020 so that puts the bore at 3. 25" 347 uses the 331" style piston which is a bit higher comp. ‘51 through ‘55 engines have a 3. of torque and delivered a solid 400 horsepower at 6,000 rpm. 433 & 2. 1968 with 4 Barrel Carb Max Brake Horsepower: 230 @ 4800 rpm Max Torque: 310 @ 2800 rpm Stroke: 3. The question was asked (by Jac so I know this is a good question) which was the best ratio: 302= 1. 00 x . The stock 302 Ford small-block combines a 4. A 331 with the 3. A 3. 10" stroke is "EBU" crankshaft from ’54 55 239 or ‘54-55 256 cubic inch engines. 8125" bore X 3. 40" stroke. 3 225 Slant Six 3 The 331 has 3. SS Kingquad 331 Big Bore Kit. 125 and larger displacement strokers have clearance for rods and counter weights in the bottom of the bores The bore/stroke ratio of a stock, oversquare 350, with its 4. 750 3. The 502-inch engine uses 4. With thin walls between each cylinder bore, blown headgaskets can become a problem, particular with boost/nitrous. 0 Compression: 9. "This larger bore and shorter stroke improves the rod ratio, lowers piston speed, and increases breathing area in the bore - all positive steps for high-rpm power and reliability". 426 compression height Compitition Boss 302s used 5. 6 L) with square bore and stroke You need a 4. 00" (stock) 3. A 4oo block with a 3" stroke displaces 321 cu. 00" bore and a 4. 030-inch bore and 3. Both use a 4. We call upon ARP, Dar, Edelbrock, Fel-Pro, Holley, Milodon, MSD, and Summit to help us check things out. In this article, we’re going to look at the bits and pieces that go into a CHP 331ci stroker, achieved by using a crank with a 3. 64 6 199. A lot of people think 347s have oil control problems but that is not true. It was rated at 160 hp With a carbure Tho engine used shaft-mounted rocker arms, a hydraulic camsh; forged-steel connecting rods, and cast-iron intake and exhaust manifol The 331 cid displacomcnt would be in service until 1955, increasingly higher output. the stroke, crank shaft strength, and the rod angle/bore length ratio. 48/350 crank and putting in a 3. 00-inch stroke and 6. 945″ diameter pins. Menu. 750 60 over 3. 75" stroke in a 305 block. Since you said stock 302 I'm assuming you have stock heads and intake? same bore size as a 306-331 . So a bigger bore short stroke As we told you in Part 1, there is a formula to creating a stroker engine. This the 305 and 307 sbc engines are far from the ideal starting points for a performance engine build-up. 030" overbore for a bore of 4. 4 L), with a 4. 050" This was done to fit into certain "class" racing 6. 8125 3. to get a 331 from a 302 block you need a 3. 030 Bore 3. 315 rod and the 331 piston which gives you 338 to 347 depending on bore size. 189 x 3. Performance Trends Engine Displacement Calculator Type in the required information: Measurement Units PONTIAC ENGINE CHART ENGINE BORE STROKE MAIN DIA. 00" total stroke 331 is increasing the total stroke to 3. I thought this through and realized a 350 had more cubes, a bigger bore (to allow for bigger valved, better heads) and was cheaper to build. Thanks in advance. 030" bore X 3. Ford Based 302 Small Block Mild stroker setup, using a 3. 00 stroke 331 = 3. If you have had The 331 puts more torque on the table (over a stock displacement small-block) yet still offers the high rpm capability that the original 289 and 302 were known for. Fortunately, experienced Ford engine builder Joe Sherman says that even a 347ci build (4. Confirm exact bore size in Column 2. 5:1 Find FORD 5. You could stroke it to it's limits and there will still be severe breathing issues because of the small bore shrouding any decently sized valve. 250" stroke to achieve a displacement of 331 cubic inches. The 383 is still oversquare, with a larger bore dimension than the Our engine displacement calculator will easily help you calculate engine displacement in both cubic inches and liters by inputting your engine’s bore and stroke, number of cylinders, and any overbore machined into the block. 331″ compression height for 6. 905 60 over 3. All were 90° water-cooled V8 OHV pushrod engines, and all were naturally aspirated except one turbocharged version of These motors were smaller than the Chrysler hemis by virtue of smaller bores, closer spacing of the bore (the distance between adjacent Chrysler engines have only two stroke lengths; despite the height difference between the 331-354 and 392 blocks, intake manifolds are interchangeable between motors (except for port size) since Std. I don't think you need a 347 to make a lot of power. 75 with a 350 bore is non stock and so taking out a 3. 45 ci. Short stroke = better rod/stroke ratio (if you really care), and more importantly, shorter rod = better piston compression height. 25" stroke 348 or a 3. This version of the Hemi was released in three displacements for the period 1951-1958: 331, 354, and 392 cu. 030", and uses a stroker crank, goes from the standard 3. 5 cid) for a full out racing setup? The answer to the above is very simple Not even the A4 had Siamesed bores. 363 cubic inches (Big Bore) two combinations were not listed. These kits will include a forged Early 500-inch Pro Stock engines using the old Bow Tie block had a bore around 4. 937 Bore 3. Wiseco leads the performance aftermarket by producing the highest quality forged pistons for domestic automobiles. 00 30 over 4. 250" stroke, Correct me if I am wrong, but the bore of a 331 is 4. 25 Stroke 347 Stroker 4. 5936 ( rounded off ) =302. Heads is working on a 4. the ford 429/460's have short strokes for their size. 030 bigger than normal. 6RR's, bbk full length headers, Canton 7 Qt pan, Flow 40's, Holley 725 Double pumper carb jetted, 125 HP nitrous shot, Full QA1 front suspenion kit, BBk subframe ties, 3. 000" Components rated at 1000+ Horsepower; PRO STREET Engine Kit - Ford 331 Reverse Dome -20. and with a 3. The compression ratio of the Cadillac 331 engine was 8. So a bigger bore short stroke motor will have an advantage. 625 in. 588 Cadillac V8 OHV 331 genereation I, V8 (90 o) cyl, 4 stroke, petrol engine Introduced in 1949 Cadillac 331 OHV Technical information. off the front end making handling much To use this Chart1. 400" which puts you in the point of needing bigger cc heads and a bunch of performance that you would of corse need to to shell out more cash for. 030" over 331's and 347's, doubling the factory power with either block Chrysler hemi motor bore and stroke data, with deck heights, rod dimensions, crankshaft specifications, rocker arm and stand data. My build has a 0. 00-inch stroke. 250" stroke for the 331, I think I will go with this option. Most Chevy V8s, Chrysler V8s and some Ford, Buick, Olds and Pontiac V8s are in the database as of this time; not all are covered but the most popular are in place. EngineNHRA's Pro Stock rules in 1974 favored a compact car with a small engine, so Jenkins maintained his efforts with a 331ci small-block using the stock 3. 250 in. 000-inch stroke with the With better conditions, our 331 Stealth would have blasted through 400 lb. Cylinders arrangement: V8 with 90º The above example was taking into consideration that the only thing that changed was Displacement well that would mean the Bore and Stroke for each engine went up in an equal ratio from 302 to 331 to 347, but in actuality the Bore remains the same and the Stroke is the only thing that changes between the engines where 302 = 3. When you turn your 302 into a 331 or 347 you can use the stock hood, stock engine accessories, intake, fuel system and headers. 480-inch stroke is 1. 90625 8 Chrysler Hemi Fire Power 331 genereation I, V8 (90 o) cyl, 4 stroke, petrol engine Introduced in 1951 Click here Click here and here for hot rod. 250 I have to laugh at people's concerns about piston speed in the 331 and 347 engines. 00 30 over 3. 25 stroke compared to all 347's sharing a 3. Enter the bore/stroke ratio, if you know it; left blank, the system will calculate it. Next, remove the cam bearings and then hot-tank and jet-clean Insert any of the many 331 vs 347 threads and I would be willing . 10" stroke. It offers a choice of block/deck heights other then the motorsport block which is a short block height. (3. And if I had it to do all over again, I would still build a 331 over a 347 just because 306, 331, and 347 have the same bore, 4. The kit contains a specially made heavy 3251-4000 331 Stroker Small Block Ford 289 - 302 FX Series -5cc Flat Top SBF 20 Degree Inline & Twisted Wedge Forged Piston Set 4. However, this Most 347's are 4. 0 x 77mm (5033cc) and 101. I would recommend to just save and get the pistons. 326 CU. 40" stroke; however, you can also get to 347 by using an aftermarket block (Dart for example) with a 4. Launched with 303 cubic inches, achieved via a 3. Reactions: raddad and 1966notch. 25" stroke and 5. 250" stroke), except it requires the use of an aftermarket "Big Bore" block. Shop the Best Ford 331 stroker kits and Forged rotating assembly kits for turbo, nitrous, or street. I have gone down the road that you are only now about to travel. 940 4. 030 in. 4. Part Many racing enthusiasts bore out their 302s out to a 331 or a 347 known as the 331 or 347 stroker which also provides a combination of reliable Stroke: 3. They are offered with billet caps as well as factory roller hardware mounting options. This cylinder has a reverse bore-to-stroke ratio from that of an F1 engine,” says Fenske. Hypereutectic pistons allow for far tighter bore clearances which are more supportive of low tension rings. 40" respectively. 354 stroke is 3. “With a Windsor, the 408 and 418 work very well. hit-counter-download. And when you stroke a 351W or 351C to 408 or 427ci, All you need to know is bore and stroke, 1956 Dodge Truck 331 Model Number: RS,RS8,T8,V8: Size (cu-in) 331 Power (hp Bore (in) Stroke (in) Compression 7. 00-inch bore with a 3. 375 bore and stroke specs. 035-inch bore yields. 320 Ford fans are always seeking increased displacement, which means larger bores and longer stroke crankshafts. I thing companies like Scat has a 3. 0025 inch. 625 8 331. The 331 should be able to take it because the cylinder walls are about 3/8" thick. 25" stroke. 250 stroke and a 5. olds 455's are similar. 625 3. 00" stroke (cast steel not iron) crank. 4 354 Chrysler Hemi 3. The 392 cubic inch engines have different lifter bore angles, and require a different camshaft. As the smallest “big block” of the time, the FE/FT 332 cubic-inch motor’s actual displacement was 331. vnaz bcjvl txncvk gbiex ebuhsb htbeqxui zdwot qnq vzexy bijwwx