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L88 Chevy Flywheel.., any bad experiences

Discussion in 'The Hokey Ass Message Board' started by Panneton Bros. Racing, May 9, 2012.

  1. I want to use one of these an internal balanced 400 SBC build. They are 15 lbs., made of "nodular" iron and were spec'd by chevy as their "Hi Perf" flywheel. I know many people have used them over the years in all kinds of applications. My only concern.., has anyone had one come apart. This engine will make 550+ and probably never go north of 7000 rpm and we will be using a scatter shield. Any comments are appreciated. Thanks, Ric.
     
  2. GassersGarage
    Joined: Jul 1, 2007
    Posts: 4,729

    GassersGarage
    Member

    I ran one in a '68 Vette that was only used for street racing. The car was originally an L88 car but I was running a roller cammed 454 with a ton of nitrous. I also used the L88 clutch and had great results.
     
  3. Truckedup
    Joined: Jul 25, 2006
    Posts: 3,910

    Truckedup
    Member

    You may or may not like a lighter flywheel on the street.They can make the engine feel lumpier,engine slows down faster when you lift and smooth shifts before more effort....Or you may like the faster response....
     
  4. I had an L88 Schiefer flywheel that I installed in my '65 Belair. It was made to use with an un-dampened clutch disc, guess how I messed that up? It worked except it was noisy and I took it apart the next day and got the right disc.

    I think it should hold up fine, I'm sure the factory 454/465 HP engines came with something similar. Of all the things I've detonated, a flywheel was never one of them, even at 7500 RPMs.

    Bob
     

  5. raengines
    Joined: Nov 6, 2010
    Posts: 227

    raengines
    Member
    from pa.

    I run one on 427 inch small block, north of 600 hp and 8000 rpm with no problem
     
  6. trbomax
    Joined: Apr 19, 2012
    Posts: 289

    trbomax
    Member

    Not to be a smart ass or anything,but how are you guys swapping balanced flywheels from 427 bb and sb's for unbalanced 454 flywheels? Just askin.
     
  7. raengines
    Joined: Nov 6, 2010
    Posts: 227

    raengines
    Member
    from pa.

    my 427 small block is internally balanced, but to answer your question any combination can be balanced.
     
  8. trksmth
    Joined: Feb 10, 2009
    Posts: 372

    trksmth
    Member

    I ran them in my stock cars and my '32 B/Comp Coupe.

    I've used them '20 plus years and no troubles running them up to 8200 rpms. I have had four, still have three. Mike
     
  9. trbomax
    Joined: Apr 19, 2012
    Posts: 289

    trbomax
    Member

    So a balanced wheel from a 427 can be made "unbalanced" and used on a 454?
     
  10. sdluck
    Joined: Sep 19, 2006
    Posts: 2,607

    sdluck
    Member

    No a 454 can be internally Balanced
     
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  12. fms427
    Joined: Nov 17, 2006
    Posts: 864

    fms427
    Member

    I used one of these flywheels on my 69 L88 road race car for many seasons - 7000 rpm shift point, north of 700 hp - no issues. Used a Centerforce dual friction clutch. I now use the same combo on my 69 427 street car - a little milder, but not much.........I like a light flywheel in a street car.....makes it rev nice and fast :D
     
  13. Thanks, great info, we are gonna use it.
     

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