Installed 91 TA 9 bolt in a 87 IROC

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Nov 25, 2001 | 11:52 AM

PALM BEACH IROC-ER

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Joined: Nov 2001

Posts: 30

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From: PALM BEACH FLORIDA

Installed 91 TA 9 bolt in a 87 IROC

everything bolted right up, but, now rear rotors are 11.66" and fronts are 10.50", so what new problems have I created for myself?

Nov 26, 2001 | 02:45 AM

ZZ42Fast

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Joined: Dec 1999

Posts: 1,747

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From: Rugby, England

Car: 1988 IROC Vert

Engine: 355 ZZ4

Transmission: T5 Manual

I did the same swap myself. I would recommend changing the proportioning valve (thats what most people advised me

) But I never did..

The brakes are now 10 times better.

I think we need to upgrade to bigger front disc, keeping it in proportion...

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'86 IROC ZZ4
Holley 750 dp, Shorty Headers, BW POSI 3.27 rear, Southside sfc's, Probuilt 700r4, Hurst Dual Gate Shifter.
Best Run 13.8 @ 100mph- far more to come!
London-England (Brothers In Arms)
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