[V8Vairs] SBC Flywheel

[Sethracer at aol.com]

In a message dated 7/9/2009 12:28:24 P.M. Pacific Daylight Time,  
Robert.Thomas at tinker.af.mil writes:

Does  anyone know of a flywheel that'll fit an 87-91 (L98) SBC that's 12"
or less  in diameter across the ring gear teeth? The stock flywheel (153
tooth) is  about 12.8". These are externally balanced and have different
bolt patterns  than the early cranks. The later flywheels have some sort
of wobbling  counterweight so they won't work.

I talked to machine shops around here  about turning down the OD of a
stock flywheel but I can't find one that  will do it. Maybe if I needed a
wagon wheel fixed I could find a shop to do  that. Maybe redrilling a
smaller flywheel will work, I dunno  yet.

I've looked at what various Fiero suppliers offer but I'm not  liking
their solutions for my application.

Bob  Thomas



Bob - What will you be using for a ring gear and a starter - and a  clutch? 
The Chevies all used the 153 tooth for the 10.5" disk or the 168 tooth  for 
the 11". Are you going to use a "special" from another application? Since 
my  V6 is an early (1985) it still has the large bolt-pattern crank flange, 
and the  internally balanced motor (at least as balanced as any 4.3V6 ever 
is). I was  able to find a small diameter flywheel to fit that crank, it even 
uses the  Corvair clutch - and starter, but I don't know what to look for in 
the later  small-pattern crank. How about another smaller GM motor, you 
looked at the  Fiero. How about the ECOTEC 4. Getting the external balance 
correct may be  tough. But I remember seeing an add-on weight that could be used 
with a balanced  flywheel to simulate the external-balanced unit.
 


Seth Emerson

C's the Day! -  Corvair, Camaro, Corvette




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