what would u do ???

[20 valve]

what would u do with $500 u.s , a S-afc ( Super air fuel computer ) or a fuel pressure regulator . this would be for a 2000 GT corolla 20v blcktop 6 speed . im listing these products becuz i need a way to lean my fuel mixture becuz thats wen the car works at its best performance band . get back to me with some info .

[Pineapple]

SAFC is your best bet. You need to tune it through RPM range. You'll need a few hours dyno time with the tuning. BTW every time you add/change things (intake, exhaust etc), you should tune it again.

[SmokingTires]

I would give a better and more descriptive title to the thread

$500 is your step to internals. Why tune the engine before it's built? Then your just going to have to tune it over and over again. It wouldn't be worth the money. Build the engine, then worry about getting it tuned.

[Eye8Pussies]

^ what he said.....an safc is just a waste of money unless you've got some major internal work, or you're going to be getting some boost soon...