C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

flywheel balancing

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Old Mar 23, 2014 | 05:39 PM
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Default flywheel balancing

Anyone in ohio have this done and where tks. Dave Ohio
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Old Mar 23, 2014 | 06:49 PM
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any good machine shop.

Are you switching from dual mass to single mass? If so, you need it match balanced.
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Old Mar 24, 2014 | 06:44 AM
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Agree with bogus, the old and new need to be matched. Look for a balancing shop ie.. driveshaft, crankshaft...
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Old Mar 24, 2014 | 09:06 AM
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[quote=burt_hacker;1586480975]agree with bogus, the old and new need to be matched. Look for a balancing shop ie.. Driveshaft, crankshaft...[/quote bump

Last edited by david frederick; Mar 30, 2014 at 08:11 PM.
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Old Mar 24, 2014 | 09:21 AM
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Originally Posted by david frederick
confuse here if 350 is internally balance shouldn't flywheel be zero balance ?
Theoretically you're correct BUT if I were doing a change I'd take the complete clutch assembly and the new flywheel and have the "assembly" confirmed.

Use a competent machine shop and they'll both know and explain the "whys" - a new flywheel should also have the surface checked by the shop when checking - assume nothing.

The dual-mass had provisions around the perimeter of it to allow the addition of weights to accomplish the balance. That's not understood by many so they just repeat what's been told and repeated time and again. It is the Internet.

I'd likely be more concerned with the clutch!
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Old Mar 24, 2014 | 11:17 AM
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If you are running a late model 1 piece rear seal back half of engine is externally balanced meaning flywheel is not 0 balanced unless a separate balance plate is used. Older 2 piece rear seal engines are internally balanced. Just need to tell shop balancing flywheel what year engine.
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Old Mar 24, 2014 | 03:16 PM
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Originally Posted by Kevova
If you are running a late model 1 piece rear seal back half of engine is externally balanced meaning flywheel is not 0 balanced unless a separate balance plate is used. Older 2 piece rear seal engines are internally balanced. Just need to tell shop balancing flywheel what year engine.
thanks, had that verified today, still having hard time finding someone locally.
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Old Mar 24, 2014 | 04:21 PM
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Hey, not to hijack your thread but was gonna make a similar one.

I picked up an LT1 out of a camaro that was in front of an automatic so it utilizes the flex plate. I planned on installing a Fidanza AL flywheel. I should still have the AL flywheel balanced to the flex plate, correct?
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Old Mar 24, 2014 | 05:11 PM
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Originally Posted by RandomTask
Hey, not to hijack your thread but was gonna make a similar one.

I picked up an LT1 out of a camaro that was in front of an automatic so it utilizes the flex plate. I planned on installing a Fidanza AL flywheel. I should still have the AL flywheel balanced to the flex plate, correct?
good luck some say they need the crank to balance the flywheel.
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Old Mar 25, 2014 | 07:07 AM
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Originally Posted by RandomTask
Hey, not to hijack your thread but was gonna make a similar one.

I picked up an LT1 out of a camaro that was in front of an automatic so it utilizes the flex plate. I planned on installing a Fidanza AL flywheel. I should still have the AL flywheel balanced to the flex plate, correct?
You need to check with Fidanza of course but I'd think all of their product is constructed to 0 balance and the I believe 125.5 gr weight is a "bolt-on". The question is I'd think is the weight consistent OR do they maybe alter the weight of the "bolt-on". Depending on their answer would dictate what you would ask a local shop to do and explain. You do need to confirm the "bolt-on" is secured. You need to be concerned with the balance of the clutch!

Why not a heavier steel f-wheel?
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Old Mar 25, 2014 | 09:08 PM
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Who wants a heavier steel flywheel?
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Old Mar 25, 2014 | 09:26 PM
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Originally Posted by Deakins
Who wants a heavier steel flywheel?
Those seeking drivability, extended clutch life and just generally better all-around performance. There's places for an aluminum light flywheel but I don't believe the statement that it's a flywheel for all can apply!

If the poster I asked the question of has a specific reason then that's fine. I only asked why not. I'd guess that probably 60% or more that purchase a 13 - 15 lb flywheel might be better served with something in the mid to higher 20's. That same 60% if given the opportunity to redo the build might also agree. Then again "maybe NOT"!
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