Does anyone have logs of injection duration vs. MAF? I plan
04-12-2004, 12:41 PM
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I can dig some up - they don't quite directly correlate, due to RPM...
Your RPM determines how much of that total MAF airflow value is going into each cylinder charge, e.g. lets say you have:
MAF 250 g/sec at 4500 rpm
MAF 270 g/sec at 6000 rpm
You'll likely see that your injection duration is actually higher at 4500 rpm than at 6000 rpm. There are actually more 'grams of air' entering the cylinder at 4500rpm, even though there is less total air flowing into the engine.
Actually the correlation between MAF and injection duration is somewhat analogous to the correlation of horsepower to torque.
MAF 250 g/sec at 4500 rpm
MAF 270 g/sec at 6000 rpm
You'll likely see that your injection duration is actually higher at 4500 rpm than at 6000 rpm. There are actually more 'grams of air' entering the cylinder at 4500rpm, even though there is less total air flowing into the engine.
Actually the correlation between MAF and injection duration is somewhat analogous to the correlation of horsepower to torque.
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