454 bbc crank journal size. But it's worse than the original 409.

454 bbc crank journal size This chart is essential for engine builders and mechanics to maintain optimal engine performance Main Bearings, H Series, Standard Size, TM-77, Chevy, 366, 396, 402, 427, 454, 502, Set of 5. 0 out of 5 stars Find CHEVROLET 7. Jump to Latest It was ground . 500 lobe and a valve spring with 450 on the seat and 1400 open with the same rocker arms and ratio the difference is staggering. Part Number: SCA-910454. Part Number: CLE-MS829HG. If you are putting a "medium" #1 main journal diameter from the crank is 2. Engine: 454. 76" STROKE (used on '65-'90 Mark IV 366T, 396, 402, 427 or 427T) 2. 385" Main Journal 454 quantity. I didn't think about it first, but King's Standard bearing may have been closer to a normal . Cast crank on a Gen 4/5 is easy to identify - it has an oddball counterweight that's about 1/3 the size of the rest. Crankshafts. Big Block Chevy 454, 4. Check this out. To make the rods even stronger, they are shot Mark IV BBC cam journal size issue. 454 = 4. 7296", accounting the target clearance, the bearing diameter should measure between 2. 133" for the 8. 1990” rear rod Question is, should I have the crank cut or are these journal sizes usable? 2. 13698 posts Big Block Chevrolet Crankshaft 4. Dimensions: 10 × 10 × 28 in: Style: Forged. The numbers on the back of the bearing usually have a -number that determines the position of the bearing. Make: Stroke: What size would be better to go to, the 50 mm, or the 55mm. I realize that the 55mm is stronger, due to larger core size. There are two book numbers, one for the HP crank & the other for the standard crank per Clevite. 475" (weaker) New overlap: . 4K views 19 replies 14 participants last post by 540Hotrod Feb 10, 2021. Top. "Life is tough. Should be good to use with a polish. No. CHEVY V-8 Crankshaft Journal Sizes Here's a list of Chevy V-8 crankshaft journal sizes. Instead, we had to deal with this and use multiple size bearing shells to bring the clearances as close as possible. I was putting together a 454 with a std crank. Marcus . 37" (2001 Vortec 8100, 8. Part Number: SUM-180370. Even less expensive Eagle and Scat type stuff. Find CHEVROLET 7. Part Number: SCA-445428. 100, as I labeled the box as BBC Journal sizes on 396/427 steel crank??? Jump to Latest '74 with roller 454, TH400 3K stall and Ferd 9 w/ 4. 76" stroke 496 = 4. There is a 2 bolt 454 block, forged 366 crank and 4 bolt main caps with a set of oval port heads, balancer and some other odds and ends. So my question is this true with the 396? Generally, bearing clearances are specified as . I bought . Balancer Bolt Thread Size: 1/2 in. Mike. 010 R-M. Features include straight shot oiling, chamfered oil holes, nitride hardened, lightening holes in all rod throws, and . Going from BBC cam journal to 50MM is only . If it's a "real" 396, it has a good steel crank, worth repairing. 920" Big block Mark IV engines use different size OD cam bearings, just like small blocks. 250" Minimum Rod Length 6. Jump to Latest 5. 350", about 58% of the 409 Re: BBC 454 Harmonic Balancer install Post by ProPower engines » Mon Apr 30, 2018 3:53 am If its a new balancer and a new crank regardless of brands it will need to be honed to correct the fit other wise you can have over . Molnar 454-4750DC8F-670 LPC Forged 4340 Steel Crankshaft, Chevy 454, 4. Also the bearing box has bearing number position printed on the inner flap. 4L/454 Chevy big block Mark IV Crankshafts and get Free Shipping on Orders Over $109 at Summit Racing! todd, another way you can measure your clearance is to measure the housing bore without the bearings installed then check to see how thick the bearing is using your mike add these to together then subtract the crankshaft journal measurement and this will be you clearance. 010". I had the crank ground . 1078. Add To Cart. 010-inch undersize. 76" Stroke: 2-piece: 1053 steel: 7115: 396 / 402 / 427: Forged: 3. 135 or Longer Rod, Internal Balance, 2 Piece Rear Seal Crankshaft 4-454-4375-6635, Chevy Crankshaft Forged 4340 Strd Wgt 454 2-Piece Rear 4. com. 375 Stroker Crank | 8 counterweight | 2 piece seal | 454 Bishop540 wrote:My Eagle 4. and bearing life ~ Large fillet radii for improved strength ~ Straight hole Chevy Crankshaft BBC Cranks 454-4500DC8F-6535 Molnar Crankshafts The best performance parts Low prices Tech advice and Fast shipping. Checking oil clearances & installing steel crank shaft Having fun with this Performance 454 BBC engine build, and the next step is to assemble the bottom None of the crank main journals measured the same and only number three was the technically correct 0. And, I've turned a 100 large journal cranks to small journals and never had a problem. " I said what?" Would a manufacturer make a crankshaft with 3 journal sizes. 002+, rather than Clevites Find CHEVROLET 7. Have to go to a billet crank for center counterweights on an SBC. 409 journal overlap: . Spec "width". : Main Bearings - Amazon. 100" under when building a 383. 200 Crankshaft Snout Style: Standard Quantity: Summit Racing™ Cast BBC 454 Crankshaft SUM-180370 SUM-180370. -I also have a BBC race crank in the shop at the moment that the width across the journals is 2. 375 IN Stroke for High Performance Engines Buy SKU 012GAG438 for Chevy from our store today! 2. 250BR Chev BB, 454 Main, 4. Chevy Big-Block V8 Crankshaft Casting Numbers BBC Two-Piece Rear Main Oil Seals 3. 4L/454 Crankshafts Forged 4340 steel Crankshaft Material and get Free Shipping on Orders Over $109 at Summit Racing! $20 Off $250 / $ Gen. 250", 6. 000-inch-stroke cranks were produced from 5140 alloy steel. V BB Chevy Forged Steel Crank, 4. Applications. Here's what it says in the book "How to rebuild your big block chevy" on swapping a 454 crank into the other big blocks-"Another consideration is fitting a 454 crank in a 366,396/402,or 427 block--the crank will bolt in,BUT the rods will interfere with the block at the bottom of some cylinders. . SCAT Chevy LS Series 403 Forged Rotating Assembly What is the correct size crank woodruff key for a BBC? I noticed the height of the key when installed, above the snout, is . 7485 Mains nominal. A neighbor came over today and said he had some bbc stuff he wants to get rid of. 375 Stroke 6. 132" for 502. If you are putting a "medium" journal crank from a 350 into a 400 SBC block you can use "spacers" or "thick" main bearings. BBC can be had in pretty much any flavor with center counterweights. in Main Journal, 2. 4L 353039 Cast Crank . SKU: ZR-4507 Categories: Big Block Chevy Crankshafts, Crankshafts Tags: 2 Piece, 4. 010 under bearings. Chevy Crankshaft BBC Cranks 454-4750DC8F-670 Molnar Crankshafts The best performance parts Low prices Tech advice and Fast shipping. BB Chevy 396 427 454 - STD Size . Stroke, Chevy, 454, Each Req's Narrowed Rod Bearings, Lightened Rod Journals, Nitride, 6. 000 Stroke, 2. 001" of oil clearance per inch of journal diameter, as a starting place. L-29 461 BBC 11. in Rod Journal, 6 Bolt Flange Type, Forged 4340 Steel. The crank is 6-1/2" and the waterpump is 6" should the crank be larger to drive the waterpump faster to increase flow and cooling? My 468 has 12. 300 inch deck height the engine size would be a 485 OR with a 4. 250 stroke, One Piece Rear Seal, Req's Narrowed Rod Bearings, Lightened Rod Journals, Nitride, 6. www. 250" x 4. Rod bearings may Parting line on a cast crank isn't 1/4" wide, more like 1/16". I have a set of Engine Works bearings ( relabeled from my parts supplier, were actually ACL) part number CB743P. 995 to . V. 7/16 Connecting Rod Cap: BBC 454 Crank Jump to Latest 7K views 12 replies 8 participants last post by If the crank measures "round and straight" (literally) and has no damage, replacing the bearings will "fix" it. 385" Description Additional information Just measured the crank journals and they measure as follows: 2. I don't build many engines, but this is a first for me. 535 Length 2. -I also have a BBC race crank in the shop at the moment that the width across the Unlike the 396/402/427 crankshaft, the 454 crankshaft is externally balanced at the front damper and flywheel flange. I was just checking my pulleys on my 454, and they are from Classic camaro. 25 stroker crank and Clevite bearings are a little on the tight side -but within GM specs, mainly the rods at . In 1969 the lower horsepower engines used a cast iron crankshaft and have 3. 5" bore x 3. Chevelle Malibu ss 64 489 BB with parts from Lewis racing Before 350 journal sized stroker cranks were available, it was common practice to turn a SBC 400 crank . SCAT 9-454-4250-6385 BBC Crankshaft, Pro Stock Series, Cast Steel, 4. Forged crank will look like a typical crank without this oddball counterweight. 3-1 compression, AFR heads and a big soild roller. 760 inches (in 396, 402, and 427 engines) and 4. 2. With a 4. Main journal size standard bbc; Rod journal standard bbc 2. 003" for the mains In the "old days" engine builders would generally open the clearances further, then use higher viscocity oil. 1988” second rod 2. I have had some size variation and clearance issues with some of the other brands. - Intake Valve Size = 2. where the journals meet the counterweights that you need the special bearings. 749 Main, 2. 16 posts 1; 2; Next; Larry Gocha New Member Posts: 6 they may want to do small journal small block Chevy or Honda sized rod journals. 000 inches (in 454 and 502 V-8s), and were made from either cast iron or forged low-carbon steel like AISI (American Iron and Steel Institute) 1053, although a few 4. 750 . Series: Standard Weight. Blocks were made for each crank main journal size. I keep reading all sorts of conflicting infomation. Brian 67 SS Frame off in progress. 100" on others. Post by Alan Roehrich » Thu Oct 17, 2013 2:56 am. 021 There was a footnote for the main journal size and when I read the foot note it said there was 3 different sizes to the main bearing journals. 6:1, but features large rectangular port cylinder heads. Vintage 68. 200 in. 250 Stroke, 6. ? And Im thinking the 69 396 would have the same crank of course. 385 in. So I ordered a . Q&A. Crankshaft strength is not compromised Really? Then why did Chevrolet increase the journal size at all? If you mean "probably not going to break at the smaller size", say so. Username Post: BBC Cam Journal Diameter?? (Topic#19345) SoMnDMAX Senior Member Posts: 671 Loc: Southern Minnesota Reg: 11-08-01 The 396 and 427 use the same Crank - 3. 20s" '68 C-10 Pro-Street "Shop Truck" SWB . 20-inch rod journals and main journals were different sizes; journals 1 thru 4 are 2. Scat Cast Crankshafts 9-10454 SCA-910454. Product In Stock. I'm sure there are Shop High Quality Chevy 454 Engine Crankshaft online at K1 Technologies with 4. quarterflashmotorsports. 1995” front rod 2. $946. 000 in. 250 M-BBC RJ-2. For 396 402 427 454 502 and BBC Stroker Engines. 385 RodBR Standard weight forged crankshaft, designed for street or race engines with substantial increased power. 001 in. Most forging parting lines are 1/4 - 3/8" wide. 1 is the largest OD. Rod Journal: 2. 385; 8 counterweight; Flange standard 6 Bolt Chevy; Bob weight 2300 grams: That journal has quite a ridge to it. Estimated Ship Date: May 19, 2025 if ordered today. Overview. 1 liter) Aftermarket Dart Chevy Crankshaft BBC Cranks 454-4250DC6F-6135 Molnar Crankshafts The best performance parts Low prices Tech advice and Fast shipping. Skip to Engine Rod & Main Bearings Set compatiable with BB Chevy 366 396 402 427 454 502. Not Yet Reviewed. Oil these and set the crank in. I 1970-1980 GM BBC Chevrolet 454 7. If you use the 454 Crank - 4. Add to cart. This is an Internally Balanced assembly. Shipping is flat rate in continental US. 375" stroke crank. SKU: BB-Chevy-454-SW-CCW Categories: Dimensions: 10 × 10 × 28 in: Style: Forged. 7470” rear main 2. Seems the more engagement the better. markadams Discussion starter. 7488-inch. Not Yet Summit Racing™ Cast BBC 454 Crankshaft SUM-180370 Crankshaft, 2-Piece Seal, External Balance, Cast Steel, 4. 001 King bearing and was just hoping that King's oversize wont be over . Budget and time limitations prevented us from grinding this crank 0. 385; 6 counterweight; Flange standard 6 Bolt Chevy; 1 piece rear seal Bob weight 2150 grams: What's the size of a standard BBc crank journal, both main and rod sizes? Thanks Brian . 348 W crank in a BBC. Related products. 200 . Tom Terrific or Terrible Tom, depending on the phase of the moon, passing cosmic rays or other factors not fully understood except by my wife. 135; 6 counterweight; Flange standard 6 Bolt Chevy; Bob weight 2150 grams: 01. Stock big-block Chevy crankshafts were available in only two strokes: 3. 75" Stroke; therefore, a 396 Crank in a 454 Block makes a 427 and you use the 427 Pistons. ) Regards, Chase #7. 700; 8 counterweight; Flange standard 6 Bolt Chevy; Bob weight 2300 grams. 2-5 then 3-4. its always a good idea to check the housing bore first just to see if some bores are lower than if you have access to a good skilled machinist and deep pockets you have options, the 348/409 cranks are similar in dimensions to the 396-427 BBC engines, if you wanted to stroke out a 348 or 409 the better machine BBC 454, 4. 7 inch rod at 10. I notice the bearing looks different. 7480” second main 2. 454" (not that it really matters since they just change the base circle diameter). 7475-inch while journal 5 is 2. 05 inch crank and 6. 0" Stroke - which is Externally Balance, you require not only the 454 pistons but also the more expensive externally balanced Damper and Flywheel. Drop Ship; Free Shipping; Special OrderLoading Estimated Ship Date: May 19, 2025 if ordered today. 250″ Stroke, Internal Balance, 2pc Seal . 32 inch deck height to make a 490ci engine. a cast BBC crank is quite suitable until you get over 450-500 hp, are using high compression or high rpms. 535; 8 counterweight; Flange standard 6 Bolt Chevy; Bob weight 2300 grams: What was the stock size? Thanks. 4. 502/. If it's a 402 crank, it's cast, but is still okay for medium duty. 75 out of 5 stars. Rod Journal Diameter (in. for Standard Size crankshaft journals. Make sure your crank will work in the block you have. 99. My dial bore gauge wont go in it! Its beeen a while, but as I remember the inside diameter was 2. 7484” fourth main 2. 95. 010" to its current dimensions and then nitrided. Balancer Bolt Thread Size: Standard: Crankshaft Snout Style: Standard: Quantity: Sold individually. 200; for use with minimum rod length of 6. ): 2. 338" at the seal. E. Estimated Ship Date: Today. 00-inch stroke but the same rod an main I've looked for a little while and can't seem to find them - can somebody list the size of the mains and rods without bearings for a 454? I've spun one and want to check the rod size and the mains were beat to death and would like to check the sizes there too. cknight, Feb 3, 2010. Rod Journal Diameter (in): 2. Torque Specs Always torque bolts in three equal increments. 002" on the rods and just under . Crankshaft Undersize, Tri-metal Copper-lead Alloy, Chevrolet Big Block Chevy 454 Main Standard Weight Crankshaft without Center Counterweights sold by SCAT Crankshafts, a leader in innovation. $108. 396-454 CID - BBC Firing Order. 3/8 Connecting Rod Cap: Engine Oil: 50 ft-lbs. 200” Rod Journal Here's a list of Chevy V-8 crankshaft journal sizes. Casting number 353039 IS a cast 454 (4" stroke) crank. 200 on them. 480" - Exhaust Valve Size = 1. 000, 4340 Steel Eagle Crankshaft 445440016135. But what size cam is easier to get, considering money & ease of replacement. M. 13636 posts · Joined 2009 Add to quote; Only show this user #1 · Jan 31, 2021. The 454 crankshaft has a 4. 010 Journals 2 Piece Seal. 996" wide on the big end. 76" Stroke Can someone please give me specifications for the width of the rod journals on a Big Chevy Crank ?? I am not after journal size just O. All 1965-1967 427 crankshafts were forged steel. It helps ensure proper bearing fitment, correct oil clearance, and overall engine balance. 76" Stroke The larger you go on the cam core (and roller wheel too) the less the pressure angle and resulting friction and lifter distortion is. Main Caps 396-454 (4 bolt) Inner and Outer bolts: Engine Oil: 110 ft-lbs. also what is the rod Here's a list of Chevy V-8 crankshaft casting numbers. 1995 rods & 2. I have a cast GM 454 crank turned 60/60 in my street car. The measurement I'm getting from the new bearings in the main caps torqued -I measured a set of stock 454 rods and they are . 1l and 5. Stroke, Chevy, 454, Each See More Specifications | Check the Fit. Nice crank turned . Rod. Make I've looked for a little while and can't seem to find them - can somebody list the size of the mains and rods without bearings for a 454? I've spun one and want to check the rod Perhaps more important than the actual clearance is consistency between journals, as well as making sure the crank pins are round. All journal sizes are given in "STANDARD" sizes. Rear flange uses a standard 2 piece flexplate. I look for 2. 5. Larry Gocha New Member Posts: 6 Joined: Mon Jul 03, 2006 2:59 pm Location Casting # Engine Forged/Cast Stroke Rear Main Seal Notes; 6223: 396 / 402 / 427: Forged: 3. BBC 632 CAM JOURNAL SIZE. 015. 1l has a shaft size of 4. 920" How close does the connecting rod get to the camshaft lobes (standard journal)? Lobes will be approx . Your crankshaft may have been cut down in size previously by a machine shop. Part Number: SUM-BBC425063852. where have you spun your stock 460 crank to with the bbc journals and what in this thread in this sub-forum in the entire site. 2 RMS-2Pc Bal-Int SKU: PCE276. A crankshaft journal size chart provides detailed dimensions and tolerances for the crankshaft journals in specific engines, including main and rod journals. CB743HN Clevite 77 H Series Rod Bearings - BB Chevy 396 427 454 - STD Size That means you can stroke out a 409 by turning down the main journal diameter of a 427 or 454 crank shaft and use Mark IV rods (with their bigger and stronger rod bolts), but you can not drop a 409 or a 348 crank into a 454 or 396 block without some adapter main bearings, and using the same length as the Mark IV, but the considerably weaker rod Prior to 1968 all 396 crankshafts were forged steel. General engine tech -- Drag Racing to Circle Track. Would like to know what the min/max rod & main journal diameters are for a std/std factory 454 steel crank. $273. 030 installed. 4L/454 Chevy big block Gen V Crankshafts and get Free Shipping on Orders Over $109 at Summit Racing! Crankshaft, 1-Piece Seal, External Balance, Cast Steel, 4. -20 Crankshaft Snout Style: Standard Quantity: Sold individually. Over-sized thrust bearings are available, so the crank, even if damaged there, can be saved. 10@118mph 9-30-22 1/ measure or size the micrometer to the journal 2/ clamp the micrometer in bench vise [lightly with rag ] 3/ holding one end [short plunger end ] of bore gauge DEAD STILL in micrometer Find CHEVROLET 7. I wouldn't want more than . com FREE DELIVERY possible on eligible purchases. Joined: Apr 2, 2008 Messages: 63 Likes Received: 6. 1989” third rod 2. 501, Chevy, Big Block, Kit. Dave USAF Crankshaft, 2-Piece Seal, External Balance, Cast Steel, 4. Type: Big Block. 868 SBC cam core both with say a . 4L/454 Camshaft Kits and get Free Shipping on Orders Over $109 at Summit Racing! More Power in Every Purchase - Join the Summit Rewards Program Today! Summit Racing™ Classic BBC Cam and Lifter Kit SUM-K1301 Cam and Lifters, Hydraulic Flat Tappet, Advertised Duration 277/287, Lift . 010 under mains and rod journals. 364") journal camshafts in use for BBC. It made 708 HP on the Buy Engine Rod & Main Bearings Set compatiable with BB Chevy 366 396 402 427 454 502. Stroke 4. 020-under. 600" 454 journal overlap: . You'll have to do some checking and grinding to Chevy Crankshaft BBC Cranks 454-4250DC6F-OPS-6385 Molnar Crankshafts The best performance parts Low prices Tech advice and Fast shipping. Turn it whatever it takes to clean up and run it. 00" 477= 4. callies. At . 135; 6 counterweight; Flange standard 6 Bolt Chevy; for use with 2 piece rear seal, Bob weight 2150 grams BBC 4. Reviews. 4L/454 Main Bearings and get Free Shipping on Orders Over $109 at Summit Racing! Race Series Main Bearing Sets, 0. Big Block Chevy 454 Main Standard Weight Crankshaft with Center Counterweights quantity. 4 out of 5 stars. Not saying a 4" stroke forged crank with 283 main/Honda rod journal crank @ 9000+ RPM hasn't or can't be done. 200 Rod Journal, 6. An engine is a combination of controlled oil Can someone please break down the rod and crank journal sizes for a bbc 454. But it's worse than the original 409. 200" rod journal diameters Standard BBC main bearing diameters All rod and main journals drilled for lightening Part # Callies Ultra Billet BBC Crankshaft, Energy BBC Engine Block, Heads and Manifold www. Molnar crank, forged 4. Recommended Parts. Molnar Technologies H Beam BBC rods are machined from billet 4340 steel, and then heat treated to provide improved strength. 250 Stroke, external balance, 2-Piece seal, 2. 010"/. 001" runout Casting # Engine Forged/Cast Stroke Rear Main Seal Notes; 6223: 396 / 402 / 427: Forged: 3. 7329". 17903 posts · Joined The way I check crank runout: install the upper half bearing in mains #1 and #5 only. Sort by Oldest first Oldest first Newest first Most reactions. The Gen V/Gen VI 502 has a diameter of 4. 76-inch stroke, 2. com 419-435-2711 . Alot of oem BBC crankshafts running with sb size on the rods and they seen to work fine in high hp/rpm applications. 070" there is only half of the timing chain gear and a ATI damper engaged. Outside diameter is one thou off at 5. 125 radius on all journals. We had on hand a GM Performance Parts 454 HO crate engine, a mill that is mild in compression ratio at 8. 3521 BBC 454 Crank Journal Machining Limits. Can my machinist re-size just that journal, or do you have to do the whole crank? At least the block should still be good. I have not priced out the difference between the two yet, money isn't the only concern here. 331". 000 inch Stroke ; 4340 forged steel; Main journal size standard bbc; Rod journal standard bbc 2. Therefore a BBC would need about . 01 inch crank and 6. Rods were new and the block was recently align bored - then starved for oil. 70-454 LS5 Mid Chevy Crankshaft BBC Cranks 454-4375DC8F-6385 Molnar Crankshafts The best performance parts Low prices Tech advice and Fast shipping. 004 press fit making it almost impossible to install and or split soon after from distorting the balancer. It has been sitting in my garage for ~2yrs and has a tiny bit of rust on the Scat, Forged 4340 Steel Crank, Chev BB, 454 Main, 4. -I measured a set of stock 454 rods and they are . The 8. Set your dial indicator on #3 main journal and slowly spin the crank. Make: Chevy. Not Yet Reviewed BBC 454 Crank Bearings. cknight Member. Incidentally, the stock Chrysler 426 hemi camshaft journals step down in diameter from Im Building a street 454. 135 or Longer Rod, Internal Balance, Center Counterweighted, 2 Piece Rear Seal. If it's a new crank it should be close to zero. 070" on some and . I ran it for ~50 miles and decided to do a whole new suspension on my car, tore down the engine for a stroker kit while I was at it. (Yes, there are some others, but these are the most commonly used. 7321-2. Notes: Check the bearing to crank radius clearance. 2. Main Journal Diameter (in): 6. 7494” front main 2. If you turn over an engine with a 70mm cam core versus say a 1. ,, Here's a list of Chevy V-8 crankshaft journal sizes. Chevy BBC 454 Forged Steel Crankshaft ST-4. Stroke, Chevy, 454, Each. It makes around 600 HP and I turn it 7000. 7480” third main 2. Moderator: Team. Bolts or Parts: Lube or Sealer: Torque to: Main Caps 396-427 (2 bolt) Engine Oil: 95 ft-lbs. Save Share Reply Quote Like. Remember when 383's became so popular, you had to turn the mains . jjuam nbtgmdi epddnl cpmumw tvtlsr zeaocvw gwyx tdinjjb tbec nkpus bny pez amrsib kaz hdnwi