HP vs MAF Flow and dyn/cyl
05-16-2007, 10:34 AM
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HP vs MAF Flow and dyn/cyl While logging some tuning runs, I noticed my MAF was flowing 52.64 lb/min and dyn/cyl was 1.02 at WOT. This was at 5600 RPM, 11.7 AFR and 6 psi.
I'm trying to get a close estimate of crank HP for these values. I've plugged mine into the known rule of thumb formulas, and don't think they are right.
What MAF and dyn/cyl are you showing for your known (dyno) horsepower levels? I'd like to see and compare as it will be a while before I get a dyno pull in.
I'm trying to get a close estimate of crank HP for these values. I've plugged mine into the known rule of thumb formulas, and don't think they are right.
What MAF and dyn/cyl are you showing for your known (dyno) horsepower levels? I'd like to see and compare as it will be a while before I get a dyno pull in.
05-16-2007, 02:13 PM
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Not sure how reliable that is. But I really hope it's right as my maf read 58lb before it maxed and I'll take ~580hp at 8psi on a stock engine anyday! 
In all seriousness, you can gain or loose 50hp just in timing with the same airflow so I would think there is no way to read horsepower by airflow alone unless you already have some kind of baseline.
In all seriousness, you can gain or loose 50hp just in timing with the same airflow so I would think there is no way to read horsepower by airflow alone unless you already have some kind of baseline.