RomRaider

Does anybody know why maf scaling is slightly different in the lower columns on edm ej207 03/04/05 sti vs ej20 wrx of the same year

is more likely related to the difference in injector size than anything else - maf scaling could be used to pickup the difference.

May be, it's just the lower end of the scale that is a few points different. But I'm under the impression that the intake and maf are all the same.
The only reason I've notice is because I'm running an sti engine and ecu in a wrx with the wrx intake and maf. So I was trying to clarify what maf scale to use.

yeh the equipment is mostly the same, maf pipe/intake. The manifold is different though, no TGV's in the STi and most of them are rocking AVCS cams so they probably consume more air at lower RPM's because of all these changes added up.

If your rocking an STI engine with an STI ecu just load the STI basemap and off you go. Check with a wideband to make sure your on target as you'll probably want to rescale the MAF anyway.