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Thread: Breaking up 6500 RPM, Cobalt SS/SC

  1. #1
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    Breaking up 6500 RPM, Cobalt SS/SC

    Ok, here's the deal.....car has 10:1 comp pistons, 42.5 lb injectors, and 2.9" pulley.......car runs pretty good so far, still needs a few tweaks to get the trims dead on, and fix a little of the knock. However, at around 6500 rpm in second gear only it'll break up.....shift to 3rd, and it'll pull straight through to 7k.....I'll attach a scan, and the tune...I'd appreciate any pointers.

  2. #2
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    Bill@HPTuners's Avatar
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    Looks like its cutting boost to me, might want to look into your TM boost limits tables & such.
    It doesn't have to be perfect, it just needs to be done in two weeks...

    A wise man once said "google it"

  3. #3
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    Quote Originally Posted by Bill@HPTuners
    Looks like its cutting boost to me, might want to look into your TM boost limits tables & such.

    hmmm, I'll have to look into that.....tables should be in Engine-Torque Managment-Supercharger?? Any tables in particular I should look at?

  4. #4
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    desired map

  5. #5
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    cool, thanks....I'll give that a shot tonight.

  6. #6
    Senior Tuner
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    plug gap set to .032
    up the dwell timing above 4500. highlight the table 4500 and above. interpolate between corners

  7. #7
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    I changed the desired map, I guess I overlooked that first since most cars I mess with already have stage 2 lol.

    we gapped the plugs to .032, and it worked out great.....I'll have to have him come down again and try the adjustment on the dwell timing you suggested, thanks for the tips

  8. #8
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    Cool deal, glad to hear you got it figured out.

    -Bill
    It doesn't have to be perfect, it just needs to be done in two weeks...

    A wise man once said "google it"