ZZ71s said:
It seems like I saw the l88 vettes used a 153 flywheel.
You see some guys out there on the net using AL. flywheels to rev the engine faster my question could a 153 steel flywheel gain the same advantages as using a 168 AL flywheel
on the plus side , when your working with the Chevy v8 engines SBC and BBC, if you select the correct two piece or one piece rear seal components, many aftermarket manufacturers of flex plates and flywheels to reduce manufacturing costs , build a neutral balance flywheel or flexplate and simply bolt on or weld on a weight to allow the same basic part to work with both potential combos
Counter Weight Kit General Motors Flywheel (1A/2C/3C/4C)
Fits Externally Balanced Applications
1986-1999 SBC
1970-1990 BBC
1991-1997 BBC
1970-1980 SBC 383/400
LOOK THRU THE LINKED INFO
http://www.bulkpart.com/Merchant2/merch ... YcatalogGM
http://www.gmpartsdirect.com/performanc ... D=913.html
viewtopic.php?f=71&t=447
http://www.mre-books.com/chevy/engines/parts_interchange/crankshaft.html
http://www.crossmembers.com/shop/fly-wheels-c-18.html
viewtopic.php?f=53&t=5155
Small Block Chevy Flywheel Part Numbers
Part # DIA. Teeth Comments
3991469 14" 168 two-piece seal, internally balanced
3986394 14" 168 400 External balance, two-piece seal
10105832 14" 168 86-later, one-piece rear seal, ext. balance
14085720 12.75" 153 Lightweight (15 lbs.), nodular iron, two-piece seal, int bal
14088646 12.75" 153 86-up, Lightweight (15 lbs.), nodular iron, one-piece rear seal, ext bal
14088648 14" 168 86-up, one-piece rear seal, ext. balance
14088650 12.75" 153 86-up, one-piece rear seal, ext balance
10174482 89-up with six-speed m/t, requires starter (10455709)
Common clutch sizes are: 10.4", 11.0", and 11.85". Some flywheels are drilled for two different clutch patterns.
Small Block Chevy Flexplate Part Numbers
Part # DIA. Teeth Comments
471529 12.75" 153 Two-piece seal blocks, int balance
471578 14" 168 400 ext. bal, two-piece rear seal
471598 14" 168 Two-piece seal blocks, internal balance
10128412 12.75" 153 86-up, one-piece rear seal ext. balance
10128413 14" 168 86-up, one-piece seal, extra thick, HD, ext bal
10128414 14" 168 86-96, one-piece rear seal, ext. balance
14088761 14" 168 89-up 350 HO, one-piece rear seal, ext. bal.
14088765 12.75" 153 86-up, one-piece rear seal, ext. bal.
14088767 14" 168 89-up 350 HO, one-piece rear seal, HD, ext. bal
a typical street car uses a 30 lb 11 " flywheel and a 20 lb pressure plate and clutch
a typical stock car uses a 10-15lb aluminum flywheel and a 18 lb multi disc clutch that 7.25"-5.5" in diam.
but in a 1800lb-2400lb car that will see almost daily maintenance that makes some sense
http://www.summitracing.com/expertadvic ... chArticles
http://www.performancebodies.com/Produc ... s&pid=1193
think about this.....the ONLY time you get power transferred to the rear differential, the clutch is locked to the flywheel, that means the weight/mass of the total engine assembly , transmission and drive train needs to be accelerated, to move the car, stock cars typically use a direct drive,or manual transmission, and a much smaller clutch, and rarely weigh more than 1000 lbs LESS than your average street car, so a light weight flywheel has some advantages, on a street car its rarely an advantage
Finding a flywheel to fit your Chevrolet in the mid-Fifties used to be simple: There were only two possible units from 1942-'53. One flywheel (#3705385) covered all 1937-'53 cars and trucks with a 9 1/8-inch clutch disc and a six-bolt mounting pattern; the other (#3705387) covered all 1942-'53 cars and trucks with a 10-inch clutch disc and nine-bolt pattern. Both used 139-tooth ring gears for the starter. After 1953, Chevrolet changed to 12-volt starters, and the number of teeth on the ring gear was changed, but there are still just a few different flywheels used (excluding Hydra-Matic and Powerglide automatics). Some of these flywheels were used on models from the mid-Fifties up into the Eighties. We have included some of the original casting numbers for easy reference.
Flywheel #3704831
• 1954-'55 cars and trucks with 10-inch clutch Flywheel #373919
• 1958-'65 trucks with 13-inch clutch Flywheel #3739423 • 1956-'65 cars and trucks with 10 or 10 1/2-inch clutch and 11 5/8-inch bolt pattern Flywheel #3705409
• 1955-'62 cars and trucks with 10 1/2-inch clutch and 168-tooth ring gear Flywheels #3789730 and #3705410
• 1955-'62 cars and trucks with 11-inch clutch and 168-tooth ring gear Flywheels #3758595, 3714463 and 3789733
• 1955-'71 cars and 1955-'85 Chevy and GMC trucks with 11-inch clutch and 12 5/8-inch bolt pattern and a two-piece rear main seal. (1986 and newer flywheels are different because they used a one-piece rear main seal)
• 1969-'85 Blazer and Sprint
• 1966-'72 Chevelle
• 1966-'81 Corvette
• 1967-'70 Chevy II and Nova
• 1967-'74 Camaro and 1977-'81 Camaro (with Warner transmission)
• 1970-'72 Monte Carlo (except 400-cu.in. two-barrel)
• 1981 Firebird with 305 Chevy engine Flywheel #3971021
• 1964-'73 full-size Chevy cars and 1965-'73 trucks with 10- or 10.4-inch clutch and 153-tooth ring gear
• 1967-'85 Camaro
• 1964-'77 Chevelle
• 1965-'79 Chevy II and Nova
• 1965-'68 Corvette with 327
• 1978-'81 Malibu
• 1978-'79 Monte Carlo Also these other GM models with straight six-cylinder, V-6 or 262/305 V-8 Chevy engine:
• 1973-'75 Apollo
• 1968-'71 Buick Special
• 1972-'76 Ventura
• 1973-'76 Omega
• 1975-'79 Cutlass
• 1970-'76 and 1980-'85 Firebird
• 1965-'72 Tempest
• 1973-'80 Le Mans
• 1966-'71 F-85 Flywheels #3703870 and #3729004
Models with 11-inch clutch and 168-tooth ring gear
• 1969-'74 Blazer/Jimmy
• 1970-'81 Camaro
• 1970-'71 Impala
• 1965-'74 Trucks
• 1970-'75 Chevelle, Monte Carlo
• 1977-'78 Corvette (180 and 185hp)
• 1978-'81 Firebird with 305 engine
• 1978 El Camino
• 1971-'79 Nova
• 1977-'79 Omega and Phoenix with 305 engine Flywheel #3993827
• 1973-'90 Chevy and GMC Truck w/454
• 1970-'74 Chevelle and Corvette w/454
• 1971-'74 El Camino and Sprint w/454 Exceptions to the above listings are these few special flywheels that do not interchange with each other or any of the above:
• 1970-'71 Impala and Monte Carlo with 400-cu.in. two-barrel flywheel does not interchange with any other two-barrel listing
• 1967-'89 truck with 292 engine (different from all other six-cylinders)
• 1969 Corvette with a dual disc clutch