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Thread: 2010 camaro SS goes lean at 5600rpm

  1. #1
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    2010 camaro SS goes lean at 5600rpm

    I am currently trying to tune a 2010 camaro SS automatic, the car currently has a procharger, long tube headers, and boost-a-pump with 50# injectors. i cant get this thing to stop going lean past 5600 rpm. i have tried everything i normally change for a combination like this and the lean condition gets no better. i have attached a tune file, please have a look and tell me if you have any ideas. thanks.

  2. #2
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    How much boost is it running? We're kinda discussing the same things in different threads as maf maxxed at 67. and another about going lean at dyno. Either fuel pressure drop, your your injectors arent big enough. Just some pointers.
    Thanks,

    Dustin

  3. #3
    Senior Tuner DSteck's Avatar
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    What does injector duty cycle hit when it goes lean?

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  4. #4
    Advanced Tuner vette_c6's Avatar
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    make life easy and upload the scanner log
    what is your Procharger ?
    P1SC
    D1SC
    F1A
    F1C
    F1R ?
    what is your pulley size ? crank pulley and supercharger pulley ?



    with all respect ,,
    if this is a Procharger tune u have done ,,
    take it to a tuner shop ,,
    you dont wanna break the engine
    Last edited by vette_c6; 04-25-2012 at 02:33 AM.

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  5. #5
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    It is a P1SC procharger, stock procharger kit 8 psi, if im reading this log right injectors hit 100% when it goes lean and keeps climing. so am I running out of injector? Just to verify fuel pressure is 58 psi, through the whole pull.

  6. #6
    Senior Tuner DSteck's Avatar
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    Quote Originally Posted by 05Bluevette View Post
    if im reading this log right injectors hit 100% when it goes lean and keeps climing.
    You need bigger injectors. If you want some ID850s, PM me. They are drop in and will flow all you'll ever need.

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  7. #7
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    thanks for the help guys, we decided to send the 50#ers back and step up to some 65's. strange though,everyone says the 50's should have been enough.bad batch? anyone heard of such a thing?

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    Everyone?? Who is everyone? everyone is obviously wrong. If your pressure held, your out of injector. We were too.. Same issues.. Getting ID1000's
    Thanks,

    Dustin

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    by everyone i meant people i discussed this with off the board and the company these were ordered from.

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    You're obviously building more power then you intended, or talked about then.

    Thats a good thing, right?

    Looking at your log, you may need bigger then 65lb. You may still not have enough at 65. Watching closely your at 130%, thats 50% more then where you want to be, max 80ish IDC, so 50lb injectors + 50%, is 75lb. Dsteck is right at ID850s..
    Last edited by Asylumwarp; 04-25-2012 at 07:54 PM.
    Thanks,

    Dustin

  11. #11
    Senior Tuner IDRIVEAG8GT's Avatar
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    Bullshit. LS9 injectors barely support 625+rwhp at 70psi or so.
    Gray Ghost- The abomination. 2007 Chevrolet Silverado CCSB. 98mm turbo, nitrous, 428LSX, Rossler 80E with a brake. Finally finished. 23 psi, no numbers, Slow as hell.

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  12. #12
    Senior Tuner Mep_q8's Avatar
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    food for thought, 50lbs should handle around 500whp safely, 60lbs 600whp, 70lbs 700whp and so on an so fourth.

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  13. #13
    Senior Tuner DSteck's Avatar
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    Quote Originally Posted by IDRIVEAG8GT View Post
    Bullshit. LS9 injectors barely support 625+rwhp at 70psi or so.
    Yea, I've never had much luck making a lot of power with LS9 injectors and boost.

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  14. #14
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    They seem to max out real quick. Its funny, those ls9 injectors came in the whipple 2.9l kit.. We told them about our head porting, and flow numbers. Sometimes people overrate them and give too much credit on how much they really do. Or like i said, you underestimated your power levels.
    Thanks,

    Dustin

  15. #15
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    Makes you wonder about these companies that sell a "complete" supercharger system for these LS vehicles. Save $900.00 get a tuner kit, do the BSFC get the right injectors and tune it yourself.

  16. #16
    Senior Tuner Frost's Avatar
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    Quote Originally Posted by Asylumwarp View Post
    You're obviously building more power then you intended, or talked about then.

    Thats a good thing, right?

    Looking at your log, you may need bigger then 65lb. You may still not have enough at 65. Watching closely your at 130%, thats 50% more then where you want to be, max 80ish IDC, so 50lb injectors + 50%, is 75lb. Dsteck is right at ID850s..

    DC above 100% can't be a deciding factor unless you see what he is commanding though... If he has jacked in a lot of fuel mistaking this for a tune related shortage, the estimated DC past 100% will go up.
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  17. #17
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    Quote Originally Posted by DSteck View Post
    What does injector duty cycle hit when it goes lean?
    This is what I was just thinking... You might be running out of fuel.

    Also put a fuel pressure gauge on it and make sure you still have 58 psi up top.

    EDIT: Just finished reading the entire thread. You've got it covered

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    Thumbs up

    thanks again for the help everyone,we put the 65#ers in and the car made over 530hp on a dynojet through an automatic.

  19. #19
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    You really should watch for the fuel pressure drop. Even though our motor didnt lean out, we still had a pressure drop.
    Thanks,

    Dustin