Installed a larger MAF housing, same sensor (Giac PC16 tune).
Can the MAF values in g/sec be corrected by the square of the area ration (bigMAFarea/smallMAFarea)?
Example:
reading 190 g/sec
Diameter ratio: 76/60=1.27
Area ratio: 1.27x1.27=1.60
actual MAF: 190x1.60=305 g/sec
Hi,
if you have an old HFM from Bosch like your 1.8t AEB or an old VR6 8(Bit ECU) you can do it like your area calcluation (perhaps so more easy (newdia/olddia)²=area ratio. If you want to do it more corectly you must be calclutate the area who the sensor gets in the old Case in percent and the areas in new case in parcent. Because the sensor areas is the same and in the areas factor of you calcuation you are rise it with the diameter and that is not so....
on the 16bit (HFM5) is the best you put your values in g/S from kg/h than you can do the same thing like in top... Dont forget to rescale your load signal thats importent in the old motronic, because the injector size is binded with load. I have last time started to tune my audi tt in ME 7.5 its not compareable with the old Motronic (3.8X). My car run about 450 HP with only one flash, and i have change much components (RS4 HFM, 1000cc BOSCH, tail 38mm, with pt5858)
Leo
