Is there a limiter on airflow?
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Is there a limiter on airflow? I was looking at my HPT scan and saw that my dynamic airflow (SD tuning) peaked at 512 g/sec and stayed flat from 5300 to 7200. Is there something in the editor that is limiting this or is it just the limits of the ECU?
that just means your logging maf, but why you would be logging maf when your running a 2 bar SD operating system? But yes there is an internal limit of 512g/sec which is why most people recommend going SD once you hit this limit 
PS-delete the PID otherwise it can skew your readings.
PS-delete the PID otherwise it can skew your readings.
Originally Posted by Gold Phoenix
So it is just an estimation of airflow and not calculated?
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Originally Posted by bigtymn
its the computer! you can buy a larger maf and rescale
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Originally Posted by Gold Phoenix
OK, this is for my T/A. I intend to install a D1SC kit with full exhaust system. I also have a SLP 85mm MAF sensor. I am only looking for 7-9psi of boost. Which sensor would work better and how does I go about adjusting the calibration for the larger MAF sensor?
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OK, I am not wanting to go SD on the T/A as of yet. I am only look to make 450-500whp with the D1SC and full exhaust system. I will seriously think about it when I replace the motor with forged internals.
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Originally Posted by bigtymn
its the computer! you can buy a larger maf and rescale
Originally Posted by jimmyblue
Is it true that dynamic airflow is not really used in the custom
SD OSes? If so what can you look at, for airflow value instead?
SD OSes? If so what can you look at, for airflow value instead?
Originally Posted by ringram
?? rescale what? Airflow will still max at 512g/sec its a PCM limitation on the 99+ LSx ECM's (0411 model from memory) You can rescale your MAP sensor for FI installs with a 2bar+ sensor, but not the MAF. Its going to pump out the same frequency whatever happens and never see more than 512g/sec
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i read how to rescale out of an advanced fuel injection book for gm's
it is posible the maf is only used to calculate load similar to a map on a sd tune
therefore you may cali brate it how ever you want
it is posible the maf is only used to calculate load similar to a map on a sd tune
therefore you may cali brate it how ever you want
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You will have to recalibrate the MAF so it doesnt read 12Khz when airflow is over 440g/sec otherwise its pointless. So you need a MAF that allows this. Its not a ECM only job. Sounds like a lot of work when a much easier answer is just to run Speed density doesn't it!?