Flywheel - Difference between Corvette LT1 and Firebird/Caprice LT1? - Third Generation F-Body Message Boards

FBLT4 · 12-16-2008, 10:19 AM

Hi all,

I have a fidanza flywheel part #198501 which fits the 1989-1996 Corvette LT1.

What is the difference between fitment to a Corvette LT1 and an LT1 from a Caprice? I understand Caprice LT1 vs Firebird LT1 the heads are iron vs aluminum and the cam is different. Would this flywheel fit, or no? I am thinking no because of 1 piece bearing vs 2 piece, but wanted to ask someone who would know for a fact.

Any one know for sure?

Twin_Turbo · 12-16-2008, 10:50 AM

That caprice LT1 has a 1 pc main seal crank too, it's the same basic roller block. The LT1 uses a dual mass flywheel.

FBLT4 · 12-16-2008, 10:22 PM

Hmm interesting... Anyone have an idea why Fidanza made different flywheels for the two engines with a considerable price differential? ($50!)

#198501 1989-96 Corvette/13.5 lbs. [379.99]
(http://www.jegs.com/i/Fidanza/383/198501/10002/-1)

#198581 1993-97 Camaro/Firebird LT1/13.5 lbs [$429.99]
(http://www.jegs.com/i/Fidanza/383/198581/10002/-1)

Twin_Turbo · 12-17-2008, 08:48 AM

Hummm, there must be a difference then. Maybe gear teeth count? Might be the thickness also. Those vettes used a ZF6.

Air_Adam · 12-18-2008, 03:25 AM

Vettes used a ZF 6-spd, F-cars used the T56. I'll bet thats where the difference lies.

FBLT4 · 12-20-2008, 07:03 PM

That could be... Does anyone know if I need to include the weight on the Corvette Fidanza flywheel to bolt it onto my 1995 Caprice LT1?

Air_Adam · 12-20-2008, 10:27 PM

What transmission are you trying to put behind this engine? If its a T56, then just get the F-car part.

FBLT4 · 12-23-2008, 10:39 AM

The transmission is an T56 from a 95 firebird. Will it fit to a 95 caprice LT1 motor with this Corvette flywheel? I've been told it will work, just the Corvette flywheel is about a pound heavier for noise cancellation.

Does anyone know if it will work, and do i need to attach the removable weight fidanza included in the package?

Twin_Turbo · 12-23-2008, 11:43 AM

The ZF uses a pull style clutch, not a a push style. The flywheel shoudln't differ for that but maybe it's the bolt pattern for the pressure plate.

The removable weight is for an external balance engine.

Air_Adam · 12-23-2008, 10:40 PM

If they were interchangeable, then the manufacturer wouldn't have one for the F-car and another one for the Corvette. There is something different that makes them non-interchangeable. Get the T56 flywheel.

Twin_Turbo · 12-24-2008, 03:30 PM

Does the non vette application use a dual mass flywheel or does it use a normal one and a clutch with springs? It's either that or the ZFs pull type clutch.