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Thread: Rough hot idle but smooth cold start

  1. #11
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    Hi Joe
    thanks so much for following up on my topic.
    I really appreciate the insight.
    I've made all the changes but was wondering about your comment on B3647. Should I set it to .99999 or 1.00001 just to not hit 1? I would still like it to run around 14.7AFR.

    Finally, does the tune make sense in general from what you can see, compared to other successful tunes? BTW, the Corvette has ported heads, mild cam, CAI, 9.5" billet converter, ported TB, ported LS6 intake, C6 Z06 exhaust etc.
    Thanks

  2. #12
    Joe (Moderator) joecar's Avatar
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    ( I'm sorry for the delay, I'm slowly catching up on looking at people's files in detail, it takes a while to analyze each one )

    Set the 1.00 cells in B3647 to 0.99 or 1.01 (i.e. 1% different than stoich) to avoid SOL trimming during tuning.

    I'm still looking at your tune...

  3. #13
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    No need to apologize...

    BTW, here is my latest tune with the changes you suggested...

    Thanks
    Alex

    Alex_baseline COS5 rebuilt trans w_3rd TCC_0299.tun

  4. #14
    Joe (Moderator) joecar's Avatar
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    The other thing I noticed (and forgot to mention) is that the 105kPa columns of the two VE tables (B0101 and A0009) differ.

  5. #15
    Joe (Moderator) joecar's Avatar
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    Which FPR do you have (manifold referenced or un-referenced)...?

  6. #16
    Joe (Moderator) joecar's Avatar
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    VE table seems reasonable, boost VE table seems a little steep.

  7. #17
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    Quote Originally Posted by joecar View Post
    Which FPR do you have (manifold referenced or un-referenced)...?
    honestly, i don't exactly know how GM did it with the Corvette. The reference method is still stock, although I have higher flow injectors and updated the flow table accordingly.

  8. #18
    Joe (Moderator) joecar's Avatar
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    So you have the stock fuel rail and fuel delivery system that came with your 2000 Corvette...?

  9. #19
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    Thats correct.
    Is there anything to gain with changing my current setup?
    Thanks
    Alex

  10. #20
    Joe (Moderator) joecar's Avatar
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    Alex, I'm just sanity checking your IFR table

    [ i.e. your C5 uses an unreferenced FPR, so the IFR table should be sloped, which it is ]

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