Thread: Maxing out G/Sec on MAF Frequency Table

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  1. #1 Maxing out G/Sec on MAF Frequency Table 
    GT Level Member 94GrandPrixSE's Avatar
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    Has anyone ran into the problem of maxing out your maf table? Not the frequency but the max g/sec in the horizontal chart. It has a max of 4,XXX something and im right at that at around 10,000 Hz. I am using a mini afc at 70%.
    02 GTP - Cartuning Turbo Kit PT65 3" DP, 80#INJ, N*,LQ4 MAF, Custom Cam, Roller Rockers, 130#, P&P Heads, Meth, AL103's, HP Tuners by me.
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  3. #2 Re: Maxing out G/Sec on MAF Frequency Table 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    In HP Tuners?

    Some values in HPT do just stop so using Hz or dynamic airflow is used.

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  4. #3 Re: Maxing out G/Sec on MAF Frequency Table 
    GT Level Member 94GrandPrixSE's Avatar
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    image — imgbb.com in the pic you can see the max is 4,063 lb/hr I am just about there at 3,824 and my buddy’s car is maxed out at 4.063 from 10,000 on up. I’m not sure what you mean.
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  5. #4 Re: Maxing out G/Sec on MAF Frequency Table 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    Without the picture it seemed like you are talking about the scanner function at first. My response was about certain parameters in the scanner that have a max value they will report.


    If you are reaching the max of the actual airflow in the MAF table you need to change to a different MAF sensor to gain back resolution. The MAF you pick needs to have a larger diameter housing so it can keep you within the limits of the MAF table.

    I don't know the sizes off hand that well but say you are using a 78mm MAF housing, going to a 85mm MAF housing would be the way to go. I can't remember if the LS1 or LT1 MAF's are the ones larger than the truck MAF.

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  6. #5 Re: Maxing out G/Sec on MAF Frequency Table 
    GT Level Member 94GrandPrixSE's Avatar
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    I thought the frequency was directly related with the lb/hr measurement. So my buddies car that is E-85 has way less are flow than my turbo setup as im using a afc controller at 70% and around the same frequency as him wot. His is completely maxed out at 4,063 lb/hr passed 10,00 hz. We are both using an LQ4 MAF. Is there any other walk around besides a new maf? which I believe would be the ls7 one.
    02 GTP - Cartuning Turbo Kit PT65 3" DP, 80#INJ, N*,LQ4 MAF, Custom Cam, Roller Rockers, 130#, P&P Heads, Meth, AL103's, HP Tuners by me.
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  7. #6 Re: Maxing out G/Sec on MAF Frequency Table 
    GXP Level Member GTPpower's Avatar
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    A bigger maf isn't really the best answer, especially with the issues people have with the ls7's.

    Scale back both the maf table and the ifr table the same amount. (90% or something). This will get you away from the hard limit.
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  8. #7 Re: Maxing out G/Sec on MAF Frequency Table 
    GT Level Member 94GrandPrixSE's Avatar
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    Scale these just in the tune themselves correct?
    02 GTP - Cartuning Turbo Kit PT65 3" DP, 80#INJ, N*,LQ4 MAF, Custom Cam, Roller Rockers, 130#, P&P Heads, Meth, AL103's, HP Tuners by me.
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  9. #8 Re: Maxing out G/Sec on MAF Frequency Table 
    GXP Level Member GTPpower's Avatar
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    Yes

    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
    2001 GTP Drag Car - XPZ, Tischler heads, NB intercooler, e85, Gen V, 2.3 w/ 5%OD
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