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SDI Tune

Old Jul 11, 2020 | 01:31 PM
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I have a C5 Z with a 92 fast and i belive LS2 ported tb,,
what is involved in switching this to MAF.
I know i would have to change tb and some hoses and such
I think, I would need a LS 6 stock maf, which i believe is 85mm.
any ideas or thoughts would be appreciated...
Only reason I would like to change back, is drive abilty, was tuned in dense and colder aire
and in the summer now, it can be a pita with stumbling at stops and lights, keep tapping the pedal
to keep from stalling until it picks it up again.
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Old Jul 11, 2020 | 01:34 PM
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Stock LS6 MAF is only 78mm Ls2 the 2005-2008 have the 85mm . If you want original parts you looking at a hearty tag on that unit 500 or more. Plus re tune .


What’s up with your tune ? I have files that 78 would work but they ain’t free.

Last edited by Speedy007; Jul 11, 2020 at 01:36 PM.
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Old Jul 11, 2020 | 02:08 PM
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Originally Posted by Speedy007
Stock LS6 MAF is only 78mm Ls2 the 2005-2008 have the 85mm . If you want original parts you looking at a hearty tag on that unit 500 or more. Plus re tune .


What’s up with your tune ? I have files that 78 would work but they ain’t free.
85mm is stock on C5 Z, not even close to 500
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Old Jul 11, 2020 | 02:14 PM
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What year is your c5 ? Far as I ever knew the stock is a 78mm and it was never a 85 mm until the c6 came out in 05 lol. Maybe they through them in the 01-04 ‘s as well .

Last edited by Speedy007; Jul 11, 2020 at 02:18 PM.
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Old Jul 11, 2020 | 02:18 PM
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Originally Posted by Speedy007
What year is your c5 ? Far as I ever knew the stock is a 78mm and it was never a 85 mm until the c6 came out in 05 lol.
Then you don't know, so why are you commenting on something that you don't know anything about
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Old Jul 11, 2020 | 02:20 PM
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Originally Posted by walleyejack
Then you don't know, so why are you commenting on something that you don't know anything about



Because I know nothing about your car apparently. And even if your switching to a 92 mm intake it doesn’t require you to add a different maf . Or even a tb
Would you also like a picture with this same intake installed with a vara and a stock maf in it . I have 1 for u right after the dealer was done . I just figured 1 should explain it all .

Maybe I would have handed ya some really great tuning advise as your a long time member. Install tips ect from the top rope he comes down hard over a 78-85mm maf oops my bad bro. Either way it works in the same spot was my implication.


Last edited by Speedy007; Jul 11, 2020 at 02:25 PM.
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