Originally posted by kawgomoo
well putting boost on a motor is all a compromise of timing and fuel anyhow. i think if the sube's arent responding well to boost, is more than likely because it has a pretty aggressive timing map in the factory ecm. this is seen alot in mr2's people try to tune them with piggy backs and it never works out.. mainly because most piggybacks only manipulate fueling.
yeah thats partly true with the wrx. the factory ecu does have a very aggressive timing curve especially towards redline.
But what i was trying to get at is....from the limited tuning experience i have with the wrx...i have noticed that timing yeilds higher hp than simply adding more boost and turning the timing back. It appears to me that the ej combustion chamber is not very boost happy.