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

Clutch?

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Old Jun 26, 2002 | 08:56 AM
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Default Clutch?

I have a ZZ4 that I'm putting in my 85 4+3. Has anyone done this swap? If so does anyone know what clutch I should put in?
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Old Jun 26, 2002 | 05:20 PM
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From: Gardner KS
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Default Re: Clutch? (trupp)

I assume you already know you have to use a different flywheel then your '85. You can use any clutch made to fit your '85.

I am using an '86 flywheel and a stock clutch with no problems.
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Old Jun 26, 2002 | 06:24 PM
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Default Re: Clutch? (18carfan)

Thanks, that's what I thought. I just wanted some reinforcement. I have a 12.75" flywheel for a one piece rear seal that I bought with the motor. Thanks again. Did you have any problems installing this engine? Did you have to modify the crossmember so that the larger dampner would fit?
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Old Jun 27, 2002 | 10:32 AM
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From: Gardner KS
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Default Re: Clutch? (trupp)

Besides the fact that the '85 EGR system won't work on a ZZ4, everything else should be ok or made to work easily. I swapped out the large balancer for a new '85 balancer. Didn't like the idea of "clearancing" the crossmember. -Jeff
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Old Jun 27, 2002 | 02:23 PM
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Default Re: Clutch? (18carfan)

How hard was the ECM swap?
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Old Jun 27, 2002 | 02:25 PM
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From: Gardner KS
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Default Re: Clutch? (trupp)

How hard was the ECM swap?
Not bad - wiring the MAF relays being the most fun. That ECM swap had nothing to do with the ZZ3 install. Just wanted more speed for tuning later on. I'm running '89 code too which IMO has the best driveability. -Jeff
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