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Thread: MAF vs engine HP

  1. #1

    MAF vs engine HP

    I did analysis from my dyno puls vs logs and I got very consistent results with this math (this is average from many cars):

    N/A and Turbo Engine HP= MAF (g/s) * 1.25
    Supercharged Engine HP=MAF (g/s) *1.1

    N/A and Turbo Dynojet WHP manual= MAF (g/s) * 1.1
    Supercharged Dynojet WHP manual =MAF (g/s) *0.95
    Eastern and Central Europe American Muscle and Harley-Davidson tuning
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  2. #2
    Senior Tuner LSxpwrdZ's Avatar
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    Alot of this is pending you have exact injector data and fuel pressure stable. But on many healthy NA LS setups I have seen that the G/Sec flow rating is roughly equal to or slightly more than what my Dyno Dynamics reads which is right on par with your DJ x1.1 because most dynojets in my area read anywhere between 12-15% higher than my Dyno Dynamics.

    This is just an observation however and is by no means an indication of HP however it will get you in the ballpark of HP potential!
    James Short - [email protected]
    Located in Central Kentucky
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  3. #3
    HPT Employee Eric@HPTuners's Avatar
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    I have found that the #/min airflow is pretty telling. Take the value x 10 and its pretty close to what the flywheel HP would be. Not exact science, but it is in the ballpark.
    Eric Brooks
    HP Tuners, LLC

  4. #4
    Advanced Tuner
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    Has this been verified on a Dyno? Or mph at the end of a 1/4 mile or 1/2 a mile?

  5. #5
    my results are confirmed with dyno. I never made compare to 1/4 or 1/2.
    Eastern and Central Europe American Muscle and Harley-Davidson tuning
    www.hd-customs.pl
    http://www.facebook.com/hdcustomspl

  6. #6
    Advanced Tuner
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    I didn?t use a Dyno but I went from 68 lb/m to 86.69 lb/m but my 100-140 and beyond times in similar weather conditions stayed the same? You would think such air gain will show specially at those speeds

  7. #7
    You can get more air but that's not always relates to more power. Difficult to say without seeing log before and after. With higher air you can get some limit and pcm can reduce spark or other reason.
    Eastern and Central Europe American Muscle and Harley-Davidson tuning
    www.hd-customs.pl
    http://www.facebook.com/hdcustomspl