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

HELP new spring install issue

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Old Jul 1, 2012 | 10:59 AM
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TJM
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Drifting
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From: Suwanee,Ga
Default HELP new spring install issue

We have replaced the front drive train suspension frame [ “cradle” whatever term you might call it] with a 1992 version and used a ZO7 [ FHB] front spring.

No shims were present between the old Z51 [ BMB ] on the original ’84 Drive train frame. None are installed now.

The F.S.M. is no great intellectual aid here, but does specifies a certain amount of shim according to spring color code on BOTH sides. Not exactly the formula to raise one side???.



BUT the motor mounts are not level. The driver side is lower by one half inch+. I don’t see any geometry OTHER than spring shims [ driver side] that could affect this?

I have looked at the end links 20 times, they are symmetrical.

There are spacers that go under the Shock towers, and I suppose that could affect rebound? But it’s hard to understand how this what affect the motor leveling issue??

Is there anything in the install of the lower A arms that could possibly affect this [ all new Energy Poly bushings]

We did not “Lower” the front by lobbing off the cushions or spring bearings.

TJM
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