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

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Old Oct 16, 2009 | 11:49 PM
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Hi guys,

I just sold my 84 along with alot of headaches. Now I'm looking for a TPI model. Which year is the best to get, and what options am I looking for. Thanks again for your help.
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Old Oct 16, 2009 | 11:56 PM
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My dream C4 if a 91, L98 TPI, 6 speed, z51. New body and dash.

Woo hoo!
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Old Oct 17, 2009 | 02:40 AM
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89'-91' z07 cars are awesome!
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Old Oct 17, 2009 | 09:47 AM
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Those have the aluminum heads correct?
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Old Oct 17, 2009 | 10:18 AM
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Originally Posted by Fonzy
Those have the aluminum heads correct?
Yes. Any C4 87 and up has aluminum heads.
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Old Oct 17, 2009 | 10:30 AM
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Originally Posted by cumbercr
Yes. Any C4 87 and up has aluminum heads.
Aluminum heads began halfway through 1986
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Old Oct 17, 2009 | 11:17 AM
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I have a 91 Z07 TPI truck motor
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Old Oct 17, 2009 | 01:27 PM
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Originally Posted by Fonzy
Hi guys,

I just sold my 84 along with alot of headaches. Now I'm looking for a TPI model. Which year is the best to get, and what options am I looking for. Thanks again for your help.
I have no idea of the headaches you got rid of, but generally, the TBI is simpler and less troublesome than the TPI, not to mention cheaper to maintain, repair and mildly modify. They get more sophisticated, better technically, more complex, and more expensive, virtually every year.

RACE ON!!!
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Old Oct 17, 2009 | 02:19 PM
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But the AL heads you want, if you are keeping keeping the stock ones, is 88+.

113 castings are >> 128 castings.
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Old Oct 17, 2009 | 04:15 PM
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Good to know, I wanted to modify, tune and basically pump the motor yet still pass smog laws here in California. Seemed like I wasn't going to be able to do it with the crossfire. I didn't find a single after market thing in Summit catalog.
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