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

computer/engine modifications

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Old Dec 1, 2001 | 07:03 PM
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vettedreams's Avatar
vettedreams
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Joined: Oct 2001
Posts: 279
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From: Stonewall N.C.
Default computer/engine modifications

how far can i go before the stock ecm needs reprograming? i plan on boreing .060 with flat tops, mild port/polish on aluminum heads, and clear the cats out ,the cam is already one step above stock, thanks for the help.
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Old Dec 2, 2001 | 11:14 AM
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Jimmy69
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From: Chicago IL
Default Re: computer/engine modifications (vettedreams)

If we are talking OBDI LT1 applications, you can get pretty radical and the car will still run with a stock program. However it will not be to fun to drive around, and it will idle very rough. Here is my example (I couldnt believe it ran):

421 LT1 stroker, 8.5:1 compression, CC306 cam, Ported heads/intake, LT headers Vortech supercharger. Car was driven to my house on a stock program (50 miles) so I could do some tuning for him. It was running very LEAN with the stock program, but it was running.

Jimmy
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