Hey guys.

Installed a AP v2 on a 05 wrx, HKS turbo back, hks up pipe.
The guy's gauge is reading 16psi but the ap is reading low 14's, and it doesn't keep up with my stage 2, which is running target boost.

I flashed the HWG map, it was driven for 200+ miles, and im sure there were quite a few WOT moments. Still the same situation. Adjusted the WG arm 3 turns, still no change. The gauge is a procomp just incase that helps.

What are some more remedy's or options to reach target boost? (Other than a pro tune.) Lemme know what you guy's think.

Anyone?? I mainly need to know which gauge is going to be more accurate.. My thoughts are the AP gauge because its coming from the ECU... Lemme know something.

ok, got a response from a different forum on which gauge is going to be correct, the ap gauge... so i guess ill do a couple more turns on the wg arm.

mods, might as well delete the thread.