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

plenum,runners,base

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Old Oct 10, 2001 | 10:13 PM
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Default plenum,runners,base

Are the plenum,base,runners from an iroc z or firebired formula the same as a vettes?
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Old Oct 10, 2001 | 10:15 PM
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From: Big D Tx
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Default Re: plenum,runners,base (tsquare)

the plenum and runners yes, except the runners have a rough cast surface on the outside for vettes, smooth on f-bodies. the manifold is the same for the 85 f-body tpi, 86 and up had a different bolt angle due to different heads.
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Old Oct 10, 2001 | 11:08 PM
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Default Re: plenum,runners,base (tsquare)

Same things as previously mentioned PLUS in 89, the drivers side runners no longer had the provision for the cold start valve. The 89 used the same programming as the 86-88, however, the chip contained additional fuel enrichment so the cold start valve was no longer needed. -Matt-
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Old Oct 11, 2001 | 12:46 AM
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Default Re: plenum,runners,base (tsquare)

Most importantly, don't foreget the external EGR for the Vette; f-bodies had internal EGR passages.
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Old Oct 11, 2001 | 09:16 AM
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Default Re: plenum,runners,base (tsquare)

I was just wondering because have a chance to pick up those parts really cheap.my idea was to practice my porting skills on them rather than using my vettes just in case I screw up.
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Old Oct 11, 2001 | 06:41 PM
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Default Re: plenum,runners,base (65Z01)

Most importantly, don't foreget the external EGR for the Vette; f-bodies had internal EGR passages.
i knew i had left something out.




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