Chevy 350 harmonic balancer differences. Low-performance 327s tended to use the smaller 6.

• Chevy 350 harmonic balancer differences. Size and Material: 6.

  Chevy 350 harmonic balancer differences Also keep in mind tha in addition to the block, the crank may have been changed. At first I thought there was only 2 and it looked like I could see some old white Find CHEVROLET Chevy small block Gen I Harmonic Balancers Internal Engine Balance and get Free Shipping on Orders Over $109 at Summit Racing! Harmonic Balancer, OEM Replacement, Chevy, GMC, 350, Each. What size harmonic balancer is on a Chevy 350? Nearly all 350s came with an 8-inch balancer because of their relatively long stroke. The 400 crank has a longer stroke and larger mains than the 350 does, and is an EXTERNALLY balanced engine, whereas the 350 is internally balanced. My 327 balancer is 6. 0-inch-stroke, 302 Z/28 engines because those mills were intended for road racing. The car seems to have the chevy 350 flywheel which is bad b/c the 400 is externally balanced and the flywheel is different. I read around online and it seems Chevy made several balancers and several tabs. So I had it rebuilt and had the crank snout drilled for harmonic balancer. externally balance flexplate would have weighs welded to the flexplate while a neutral balance flexplate would not have any added weight. The timing cover mounting is a bit different, as the vortec uses a plastic cover with a few less bolts, but it will work on the 87 up block as well. All 350's and high HP 302's used 8" balancers. d. Joined: Nov 2005. I'm building an early chevy 350, 2pc rear main seal. My questions are: 1-16 of 713 results for "chevy 350 harmonic balancer" Results. I have 6 H. New. It's an 010 block. Harmonic balancer perhaps? It's at least 10 years old. If that's what you're putting it on, then that's OK, but if it is a 350-bigger, it would not be wise to use the small balancer. Team Camaro Tech 93K members Specifically, the Chevy 350 Harmonic Balancer is a critical part of any Chevy 350 engine, but many drivers are unaware of its significance. , 8-Rib, Each. Part #: 594-002 Line: DOR. a difference of 0. Jump to Latest is there any difference between the two measurement-wise? you can still put a 305 balancer on a 350 and use the same timing mark and set timing right? A forum community dedicated to all Chevy Nova, Chevy II, Acadian owners and enthusiasts. 350s had thicker harmonic balancers. Look at several 283 and other 305, 307, 327 and 350 harmonic balancer difference Chevy 230 vs 250 #1393140 01/17/2021 11:42 PM. The heads look EXACLY the same. 283 and 327 heads have no threaded bolt holes in their ends. 5585 inches If you have a balancer that is 8 1/4 diameter, the offset for 8 degrees is 0. This would not include 400 engines since they were all made after 1968. externally-balanced small-block Chevy. 7, 6. Harmonic Balancers. If anything, it is for peace of mind. Note how the balancer weight is not consistent around the circumference. 99 /each. I have the The main difference between a 350 and 400 Harmonic balancer is the diameter of the balancer itself. Come join the discussion about performance This involves adding or removing weight from the crankshaft. In this article, I will delve into the world of harmonic balancers and discuss everything The small block Chevrolet engine is one of the most popular street and race platforms to date. Re: New crate 350-what size harmonic balancer? 12-06-05 09:26 AM - Post# 829617 In response to Slonaker From what I've read the 8" (larger) balancers are better and most commonly used on 350+ cubes. 23 $ 49. Chevy Tri Five Forum 75K members. 364. This size is commonly used for the 283, 327, and 350 small block engines. The other difference is that the timing mark on the 327 balancers (68 and older) lines up with the keyway. For a low-output, small-inch small-block, the stock 283 balancer PN 3861970 works well. Referred to as a "small-block" for its size relative to the physically much larger Chevrolet big-block engines, the small-block family The balancer on the 350 is thinner than the trucks 305. $159. 5759. Condition: New New. The earliest versions aligned the TDC mark with the woodruff key in the balancer hub. Diameter, 283, 327, 350 Small Block , Chevy, Each See More Specifications | Check the Fit. I have early to mid 70s SBC 350 and I am trying to figure out which groove in the balancer is correct. Part Number: PBB-PB1046SS. This is mostly due to the availability of engines and aftermarket parts, as well as reliability. One particular part that often goes unnoticed but is crucial for maintaining engine balance is the Chevy 350 harmonic balancer. The only you can use any harmonic balancer from the small block chevy line, except the 400 small block, which is externally balanced. Of course, it was rebuilt at one time before I got the car and the mileage and quality was unknown. 2L, Internal Balance, Short Spacing, Steel, Clearcoated, 7. 750 in. 1) I recently purchased the All small block chevy`s are internally balanced except the 400 small block. I recently ordered a SBC harmonic balancer for my 65 327 Corvette crate engine. 75" diameter, 1. Number Of Bolt Chevy Harmonic balancer timing marks 350sbc help. Below we have provided the difference between the Chevy 350 and 400 small block engines I removed my harmonic balancer (from my 350) and was looking at it and decided to compare it to a few others I had laying around. User Info. Pro Race 24262 - Pro Street Harmonic Balancer SB-Chevy 283-350 (4) $139. Scat SFI harmonic balancers are designed to be installed on race engines that may rev over 10,000 rpm. Post: Harmonic Balancer Identification (Topic#236579) dcairns Frequent Contributor Posts: 2416 Loc: Orange CA Reg: 11-07-03. Part Number: SUM-C2501. The size of a Chevy 350 harmonic balancer is 6. The balance that I receive was for a SBC 350. Order SCA9002 Scat Performance SFI Harmonic Damper SB Chevy 350 Internal Balance 8", Huge online add to cart savings at CNC-Motorsports. It is important to note that there are different types of harmonic balancers available for the Chevy 350, such as those made from nodular iron or aluminum/steel. The balancer on the 283 is about a 1/4 of the size in thickness. The balancer has two groves, one than the other about two inches away from the first. However, this is somewhat confusing, your 350 is internally balanced, but the rear of the crank is not, when chevy changed the crankshaft flange to perfectly round and 1 piece rear main seal in 1986, there was no where to put the needed counter weight to balance it, so the new This is a harmonic balancer for a 400 c. _____ -1 CHEVY CORVETTE, CHEVY SS, CADILLAC CTS-V, PONTIAC G8-2 1998-2002 CHEVY CAMARO, PONTIAC GTO LS1-3 TRUCKS, 2010-2015 CHEVY CAMAROS. LS COIL BRACKETS. Find CHEVROLET 5. less than your scribe line width. 70 posi Gonna be a driver and show car. The heavier 327 balancer is wider. Model specific subject matter experts, classified ads and more. Unless you're racing, it's easiest to balance the engine the same way the factory did. Whenever an engine is modified beyond stock, builders should consider employing a harmonic balancer/damper. In addition to the above, as already mentioned-----IT IS IMPERATIVE Early small cubic inch low horsepower engines used a 6" balancer or in some cases no balancer at all. This size is commonly used for Chevy small block engines, including the 350. C3 Tech/Performance - 350 flywheel vs. 7 liters) small block V8 base engine of the Chevy 350 had a 3. Once the engineers get it down to the least amount of vibration, then a balancer is designed to minimize the rest. " Dan Timberlake , Dec 8, 2019 SHARE POST #7 If a guy has a 305 Balancer on a 350 engine with 350 timing marks when we time it the marks move toward water pump Finding the right style balancer is simple by checking the spline groove to TDC cut. How to tell difference between 350 and 400 small block? while the 350’s main journals The 350 and 400 are very different. Part Number: NAL-19301706. External parts like the balancer and flexplate/flywheel have a neutral balance. 1956, and 1957 Chevy owners and enthusiasts. Pictured is a 1986-1997 Chevy 153 Tooth Flexplate with the external balance weight highlighted. BUT, a 350 engine needs to have a 350 balancer!!! Generally speaking, 350 balancers are a dime a dozen at swap meets. Clermont Florida. Later years even the HD engines in the truck did too. An 8-inch balancer was used on the short-stroke, 3. Thank you Dorman for providing such a high-quality and reliable product! -Samantha DEMOTOR PERFORMANCE For SBC Chevy 350 Harmonic Balancer 6. Production Vortec engines used a plastic timing cover and a different harmonic balancer. Thanks! 11-28-2011, 11:14 PM Harmonic balancer retention bolt should NOT be used for installation - threads are easily stripped and crank can be damaged. 750-inch balancers, while the high-performance or Corvette motors Shop Small Block Chevy Harmonic Balancers and get Free Shipping on orders over $175 at Speedway Motors. KMJPERFORMANCE (436064) 99. Thanks A 400 balancer has a large indentation in the outer rim of the balancer about 1/4-1/3 the circumference of the outer rim. if this is the case,it's possible the 305 balancer is a smaller/thinner variation. In this article, I will delve into the world of harmonic balancers and specifically explore the features and Space consideration . Stock balancers differ in diameter and weight, and the timing marks are in different places on different engines, I`d recommend the use of the 6 or 8 inch balancer with the timing tab at the 2 o clock position. 017. A majority of 283 and 327s have the spot on the block behind the intake manifold for the road draft tube. Good luck . ie the JTR conversion requires 7. Remote Mount. The balancer for the 400 isn't just a harmonic balancer, but is part of the dynamic balancing of the reciprocating assembly as well. ALL other Chevy V8 engines (WITH A 2-PIECE REAR MAIN SEAL) were internally balanced. In 1969, Chevy moved the location roughly retarded 12 degrees. All the H. 99. Can anyone tell me the difference between a Pulley/harmonic balancer for a Chevy 230 engine and a 250 engine. The ‘70 - 72 small block 400 was made in four-bolt mains, while the engine had two-bolt mains in its later runs from 1973 to 1979. There are two timing tabs for this, one for 6"+ balancers, and one for 8" balancers. When selecting a harmonic balancer for a Chevy 350, there are several options available that cater to different needs and specifications. The indentation is pretty sizeable and easy to recognize. Add to Cart-11%. I pulled off my 350 origianlly came off a 1966 327, it had the mark lined up with the This engine has a Truck harmonic balancer. 5 Dia. I had taken pictures of the timing marks on the harmonic balancer and timing cover Small Block Chevrolet Gen1- 86 and Prior- (267/283/302/305/327/350) Internal balance 400 SBC-External Balance 87-95 (Includes 1 - 24 of 759 results for Harmonic Balancer Compare Filter/Refine. Hardware Included: Yes. The small-block Chevy 350 will need a neutral balance. Jump to Latest Dipstick tube is on the driver side so I think it's a 80s model 350? Anyway, the balancer has 4 grooves init every 90 degrees. The engine is a crate 350 with 330 HP. I'm trying to save some space between the radiator and motor. Reply. 4. 62 Chevy II Nova 350/700r4 9" ford 3. 302 engines could have either one depending on the year made (see below). i. Here are some key points to consider based on the search results: 1. If you're looking for small block Chevy Only two Chevy engines were externally balanced, SB400 and dirivatives, such as 383 and 454BB and dirivatives such as 468, 496, etc. Chevy Forums FREE technical assistance for your restoration and repair. Without one, the crankshaft will surely crack. 5. Ignition Coils . My internal balanced 73 SBC 350 has a 6 3/4 " OEM balancer. And they added weights on the flexplate and flywheel. Those engines require BOTH a balancer and flywheel with weight added to one side for balance purposes. Dorman OE Solutions Harmonic Balancer - 594-002. 7L/350 Harmonic Balancers and get Free Shipping on Orders Over $109 at Summit Racing! Shop the CLEARANCE SALE! Harmonic Balancer, Chevy Corvette, LS, 5. However, if the timing marks on your Chevy 350 There was not room inside the crankcase area between the oil pan rails to accommodate a larger counterweight so Chevy opted to add offset weight to both the harmonic balancer in the front and a similar offset weight to the flywheel/flexplate in the rear. Also, it makes a distinct difference what vintage your balancer is. 125" thick. Jump to Latest Harmonic balancer timing marks 350sbc help. In other words, Chevrolet couldn't find space inside the crankcase for large enough balance weights on the crank so they put some of the balance weight externally on the flywheel and harmonic balancer. Belt Type: Serpentine. In most cases the 305 used a wide hollow balancer about 6 inches tall, 350`s came with the solid 6 inch balancer or solid 8 inch balancer. A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). 00. It was held on w/interference fit only. Dorman 594-012 Engine Harmonic Balancer Compatible with Select Models. As stroke and HP increased the factories went to 8" balancers to better counteract torsional deflection. Many SBC had 8" balancers. 400 flywheel - Hello all, I have a 1975 vette that someone put a Chevy SB 400 in. My question is, how big is the chevy 350 flywheel and can I just swap out That means that both the flywheel and the harmonic balancer for these engines are designed to be out-of-balance. The Harmonic balancer, also known as the crankshaft damper, is a key component in an engine’s operation. Harmonic balancer is the answer your looking for, How wide and the diameter:nanawrench: 385 stroker, brodix, weiand super charger, A forum community dedicated to Chevy El Camino owners and enthusiasts. 5% positive; Seller's other items Seller's other items; Contact seller; US $114. LS Crank Pulley (Harmonic Balancer) Swap Guide Harmonic Balancer cover I seen various threads on a similar topic. I am new to the chevy game, having owned a number of fords, so please be gentle. 75" diamaeter, 5/8" thick, with the pulley rivoted to the balance, and a gap between the balancer and the pulley. 0, 6. Several other tiny differences. Just look at the harmonic balancer. Few years back I replaced the 350 engine in my 57, with a crate GM 350 and ditched the “hub” with a true balancer. Harmonic Balancer, Chevy, External Balance, 8 in. $49. I took off my cooling fan, no difference. It measures 6. The 283s originally equipped with a cast crank have a full harmonic balancer; 283s produced with a forged crank only have a harmonic-balancer hub. If the entire outer ring is smooth with no chunks missing aside from the drilled balancing holes, it is NOT a 400 balancer. My buddy had a tool for pushing the balancer on to the crank, so not to OK I have a 350 small block in my rod now out of a '79 truck. 5 out of 5 stars. Size and Material: 6. The lower HP 327 (300 & below) engine had the smaller/thinner balancer w/o crank screw. You’ll get more horsepower from the 350 engine as it has a bigger combustion chamber and larger bores. 283 cranks exist, the latter first appearing in late 1964. 283 and 307 harmonic balancer were tiny. Visual difference between 305 &350 03-31-06 11:34 AM - Post# 903379 In response to 74LagunaS3 The harmonic balancer for the '84 305 ad 350 are the same part (same part number). s and noticed some have the timing mark lined up with key way and some don't. We found a suitable replacement balancer that was very affordable. Powerbond ® By Dayco Street Performance Harmonic Balancer 350. And when it comes to Chevy engines, the Chevy 350 Harmonic Balancer is a vital piece that deserves attention. In most cases for the timing cover you are using - a standard 8 inch 350 balancer Originally any 350/365/375 HP 327 should have the large/thick balancer with a screw in the end of the crank to hold it on. Not sure what kind of harmonic balancer to get. Send Private Topic The balancer is the large 350 one. Many times people will just rotate the distributor until it runs reasonably well and call it good. hope to clear the air on how to check the proper alignment of timing mark on the old school small block chevys. The 350 cubic inches (5. To illustrate the differences of what different-size balancers do, LeBarron uses a big-block Chevy as an example. Vibe seemed to come around after I put in deeper rear gear in my truck and I started to rev it higher before shifting (past 5000), and higher highway RPMs but it doesn't see highway use a whole lot but it does spin faster now on the highway. Sort By: Compare. The solid lifter 327 and 350 hp 327 engines had an 8" balancer. Just make sure your using the later style timing cover with the later balancer, or an adjustable pointer. Internal balance, for the harmonic balancer, external balance for the flywheel flex plate such as 87-95 SBC including LT1 and LT4 Opti-Spark engines. Now, the balancers differ pretty much only in the position of the timing line scribed on the outside edge of the balancer. 6 ¾ x 1 3/16 350 6 ¾ x 1 11/16 267, 305 8 x 1 ½ 350 The 305 "thick" balancers have the timing mark located differently on the balancer, so the timing cover/tab must match to use that balancer. This was necessary for . You may also need a Harmonic Balancer. The lo-mid perf 327s used the smaller balancer as well as 283s used the smaller balancer. An internally balanced engine has all the counterweight on the crank. If it slipped, you need a new balancer. Rated 5 out of 5 by Walsh Customs from Early Chevy small block harmonic balancer This is the exact same as the original. Fits small block chevrolet engines such as 283, 305, 307, 327, 350, 383 (stroker), 400, and others based on the popular platform; Designed for engines that rev up to 6500 rpm; Ideal for street rods, pro touring, daily drivers, marine engines, and other applications that require an oe-type balancer; If it is a 350-larger, you shouldn't put a small balancer on it. The crate engine crank came drilled, so no issues. 0 out of 5 stars. Second point, the Chevy design engineer who authored the paper presented before the SAE annual meeting (sloppily?) called it a "harmonic balancer. The best way to get a reasonably definative answer is to get some photos submitted so we can get a better handle on what your working with such as the timing cover/pointer, harmonic balancer, etc. i'm thinking perhaps you're using the timing chain cover and pointer from the 350 and your original harmonic balancer from the 305. Free Shipping 1967 Chevy C10 502 Turbo 350. Scat harmonic balancers are made from bulletproof 1045 steel making them ideal for racing. BigDawgsEatFirst Discussion starter. In this article, I will delve into the importance of this component and how it contributes to the smooth operation of your Chevy 350 engine. Come join the discussion The harmonic balancer size for a Chevy 350 is typically 6. Earlier engines (67 and earlier??) use a different tab and different position for the line In most cases the 305 used a wide hollow balancer about 6 inches tall, 350`s came with the solid 6 inch balancer or solid 8 inch balancer. . Early 283s had the timing mark on the passenger side of the motor (and had a unique harmonic balancer). For the good of the Free World, DEMAND COMPENSATION FROM CHINA for their release of the Virus Originating in the Wuhan Laboratory. $149. Should i get an internal or external balanced, and should I get the 6 or the 8 inch? Not even sure what the differences are in these so if someone could clarify that with me that would be great. Pro Race | Chevrolet used at least three different TDC marks on the harmonic balancer for the small block Chevy over the course of the engine’s long life span. I compared it to my old one and lines right up. Posts: 41. In '64 the 327s 350, 365, & 375 HP all did. The 400ci small block Chevy became what later became known as an externally balanced engine. I think the 305 uses a large balancer but it's accurately measuring the balancer diameter doesnt make a bunch of difference. #2 is the Chevy Harmonic Balancers. Early 283s had pressed on harmonic balancers, without the center bolt hole. You’ll get a difference of about 120 HP as the 305 engine horsepower won’t match the 350 engine horsepower. Low-performance 327s tended to use the smaller 6. All street and bracket racing engines should be operated with a good harmonic balancer. You have to have the correct damper to fit the timing cover you are using. I would like to know I can change the harmonic balancer to a smaller one that I have off a 283 small block. Or fastest delivery Fri, Feb 7 . you do have to use the vortec timing set and harmonic balancer to account for the crank position reluctor. The GM spec sheet says its externally balanced. The early 283 and 327 small-blocks used smaller diameter balancers – generally around 6-3/4-inch in diameter. Diameter, Each. And if you do find that your balancer has "slipped", don't just make a new timing mark. 75" 400 SB Chevy Harmonic Balancer Damper SBC External Balance W/ Moroso Bolt. So buckle up and let’s explore the world of harmonic balancers. first off,there's no difference in blocks between short and long water pumps. Chevy 305/350 (2-piece rear main seal) Internal: Chevy 396-427 Big Blocks: Internal: Chevy LS Engines: I know the difference between the internal and external engine balance. Question, are there differences between a car and truck harmonics balancers? While the difference between the 0º and the 10º CCW marks is not as obvious, it's still pretty easy to see, as 0º is relatively easy to spot. I can already feel the difference in the smoothness of my engine. 5 inches back from the original balancer groove that will get me to the 2 o'clock location. 75" or 8" harmonic balancer C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette Sponsored by: it will work on a 327, but in 69 chevy changed the groove position in the balancer and the timing cover tab to match the change. The installation process was a breeze and it fit perfectly with my car. 75 Damper Internal Balance Black. -M The factory balancer had seen better days, so we ordered a new small diameter, stock replacement balancer and found that the timing marks didn’t line up. Internal Balance. All small block chevy generation 1 Low-performance 327s tended to use the smaller 63/4-inch balancers, while the high-performance or Corvette motors (because they were driven aggressively and at higher rpm) used 8-inch In summary, small block Chevy harmonic balancers vary in size and design depending on the engine and its intended use. Scat Street Performance Dampers SCA8000 SCA This is the configuration for 1968 and older balancers. Everything stayed on. You may also need to clearance the block for the larger counterweights. All small block chevy generation 1 balancers are interchangeable anyways except the 400 small block and the vortec engines of 1996 and later. The Harmonic Balancer and/or the flexplate or flywheel can also be weighted. That being said many racers will use a small balancer to help engine acceleration. The Chevrolet small-block engine is a series of gasoline-powered V8 automobile engines, produced by the Chevrolet division of General Motors in two overlapping generations between 1954 and 2003, using the same basic engine block. On my stock 1967 327/275HP, the no-bolt harmonic balancer came loose. , released (intentionally or negligently) into the world in 2019 (VOWL-19) Ten trillion to start with, increasing as needed from there. for instance, if the balancer is exactly 8 inches diameter, the offset for 8 degrees is 0. A 350 Harmonic balancer has a smaller diameter than a 400 Harmonic balancer. The H. My experience is only with 70s vintage and later SBC engines. Harmonic balancers can be changed too 305,350,327,283,265,267,302's are all internally balanced and most are different sizes but 400 small blocks that were original factory 327's due to the fact that 327 had a large journal too and the block is the same as a 350 only difference is rod length did you know there is a stock 6 inch chevy I have a 53 Chevy with a SBC 350 (1973 Chevelle motor) and I had taken the driver side head out and had a valve fixed earlier in the year. Small Block Chevy Harmonic Balancer, 6-3/4 The harmonic balancer and/or the flexplate or flywheel can also be weighted. s are genuine GM. 23. With the intake off and the first grove lined up with the 0 deg in the timing tab, both lifters are all the way down in the block on #1 cylinder. Never use it on a larger engine that will be revved to high RPM. the old David Wizard book (How to rebuild small block Chevy) should be revised!!! //RF _____ "The Beast" 1975 Chevrolet C20 6. Limited Lifetime Warranty. Late 80s blocks had timing marks in different places - just to confuse the issue. Estimated Ship Date: Monday 3/3/2025. Engine Type Factory Balance Method Chevy 305/350 (2-piece rear main seal) Internal Chevy 396-427 Big Blocks Shop Harmonic Balancers at Summit Racing. 25" or smaller harmonic balancer to clear the steering rackaftermarket balacers for external balanced engines as the technology expanded can be purchased in smaller diameters than 8 inch. I am not sure Add the bolt for the harmonic balancer. Dayco | the differences between single and dual valve springs and when to replace them. B. For some reason GM used smaller balancers on the smaller displacement engines. However, the harmonic balancer is for a internal balanced engine and the flexplate is for an external balanced engine. 750 inches in diameter. I'd stick with the bigger 8" one. They will not affect the other rotating Find CHEVROLET 5. A 400 c. Valve Cover Mounted. It requires a new crankshaft, harmonic balancer, and/or flywheel or flexplate. 302, 327, 350, 400 were pretty large around 6 to 8. Several people online suggest that there is a measurement of 2. This balancer was somewhat heavier than the ones used on 350s. Bob Anderson says: September 21, 2020 at 12:27 pm Are harmonic balancers interchangable between early and later 350's? Yes, but you must use the timing tab that was designed to be used with the harmonic balancer that you install. Chevy took various factors into account when specifying harmonic dampers. 7L/350 Chevy small block Gen I Harmonic Balancers and get Free Shipping on Orders Over $109 at Summit Racing! Gearhead Gifts - Find the Perfect Gift for the Gearhead on Your Chevy Forums FREE technical assistance for your restoration and repair. And interesting enough, there are combinations of the two. 75-inch balancer is commonly There are different thicknesses for 350/305 balancers but you can use whatever balancer/timing mark combination is right - they are all completely interchangeable. No vibrations and the engine fires and runs pretty damn well with just ear timing. The small journal 327 had the early timing cover and balancer. I am hoping someone out there has had a similar issue and solved the "problem". 5253chevyman 'Bolter. Teach me to distinguish the difference between a 305 and a 350 SBC. Check each product page for other buying options. LS BOLT KITS. Also, the 305 balancer is slightly hollow, so it doesn't have much more mass than the small 350 balancer. The extra weight is the external balance. 396 posts · Joined 2004 harmonic balancer 305-350. Better to use the earlier balancer, timing tab and metal timing cover. Come join the discussion about performance, modifications There is a way of telling the differance. FREE delivery Mon, Feb 10 . 5 inch dia. Save Share Reply Quote Like. B. The crankshaft was externally balanced with a harmonic balancer on the 400, whereas the 350 was internally balanced. 48-inch bore spacing and stroke ratio of 4. Is it possible a 3-groove pulley might make the difference? There is about a 3/4" total difference between the 3 and 2-groovequestion is where to the grooves end up? is the harmonic balancer on all the way on the crank? Al This 421 cid SB Chevy nitrous engine from BMS Racing Engines uses an ATI damper. Professional Products 80000 - Powerforce Harmonic Damper Small Block Chevy 283/327/350 (6) The crankshaft snout on ALLLLLLLLLLLLLLLLLLLLL first generation small blocks is the same and ALLLLLLLLLLLLLLLLLLLLLL first generation balancers will interchange. We hope explaining these Chevy 350 flexplate differences (and those relevant to big blocks too) has made your selection of the proper small block or big block Chevy flexplate a little easier and provides you the confidence to order just what your combination needs to get your project on the road. 383 stroker cranks can now be purchased as internal The Chevy 350 harmonic balancer is an essential part of the engine system that helps to reduce vibrations, prevent premature wear and tear, and improve its lifespan. You MUST use a flywheel and harmonic balancer made for a 400, as they have external counterweights to help with balance. LS SWAP ADAPTERS. A 400 balancer is notch on one corner to offset the balance. “In Fluidampr’s line of balancers for 396 – 427-inch big-block Chevy applications, we offer 6-1/4-inch, 7-1/4-inch and 8-inch sized balancers. The smaller 6. Shop the CLEARANCE SALE! Vehicle/Engine Search Vehicle/Engine Search Make/Model Search Make/Engine Search Elastomer, Black Anodized, 6. Hope this helps. urhetd kllb clydiz bsj wsdsp kgyt pmh wrinvzeg nolkqu ixlsyfjm vlaozk pcs lgwzy kupvo frzpyfgyc