Originally Posted by Jim Galbally
johnny, i thought ACT+MAP were considered to be supplying 1 value (ie you read both sensors, do some maths and then have your input figure)
so what i'm not getting is how RPM vs TPS is all i could need? as johhny pointed out what about if the load changes or the air density changes?
Thats what temperature correction is for.
The basic map is TPS versus RPM, then you have temperature correction to allow for denser air etc.
Its a bit hit and miss to be honest though, hence why production cars also have an airflow meter, it isnt just for fun
