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Thread: G8 lsa am I out of injector or pump??

  1. #1
    Tuner in Training
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    Jan 2019
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    G8 lsa am I out of injector or pump??

    car is a lsa swapped 2.45 upper pulley stock lower pulley. milled heads .035 n/a cam for now. it has 85# injectors and in the stock fuel basket it has a aeromotive 325 pump and a jms bap that comes on 18v at 2.5v from map sensor. i have a flex sensor on it but this log is 93 only.
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  2. #2
    Tuning Addict 5FDP's Avatar
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    I'm not sure I understand your scaling method for the injectors.

    If the injectors are larger than the 63.5lb/hr limit you should have done the double stoich, half the IFR and IVT Terms method to give you headroom up to 127lb/hr.

    The way you have it now doesn't make any sense to me and likely throwing things off if you are having trouble with fueling.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  3. #3
    Tuner in Training
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    yeah i dont understand the scaling method myself. this tune is from a well known tuner in the g8 world. not naming anyone just trying to understand this logic and why i would be out of fuel... i figured i would have at least a little more room then i have currently. its a pretty basic setup i think but im just getting into tuning and figured it would be like you said double stoich half the ifr and ivt. besides that the car rips hard!!!

  4. #4
    Tuning Addict 5FDP's Avatar
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    To me the way the injector data is put in there is what is making you think you are out of injector.

    I would change how it is scaled and retune the MAF/VVE as needed. This way it will report correctly.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  5. #5
    Tuner in Training
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    i will check it out and see what happens.