I'm using HKS v2 supercharger, and almost capped stock maf now. (4.9v 280g/s at 65ºF IAT )
in my country , no one can handle SD method for FRS, so I should find another easy way to use more boost.
We can use impreza (forester ) stock maf sensor to our car
without any modification.
part number is 22680AA380
same dimension, same harness
but much higher maf reading limit ( about 130%)
so we can use more boost without Speed density method.
Stock MAF sensor log datazap
http://www.datazap.me/u/yobiwan/hks-...3&zoom=647-833
Impreza MAF sensor log datazap
http://www.datazap.me/u/yobiwan/wrx-...3&zoom=368-688
both log are from same car, same boost.
you can see Maf voltage difference between them.
4.84v vs 4.44v on same boost , same RPM ,different IAT (77 ºFvs 91ºF)
it's first log with impreza maf scale, so afr is not on target.
but it's close enough to use.
cranking and closed loop driving were smooth too.
log after 1st open loop maf recalibration
http://www.datazap.me/u/yobiwan/wrx-...3&zoom=426-648