Today,Just as in the pre E.F.I. days if you increase fuel\air you increase H.P.Just fool computer.

If you want to increase horse power you mustdo 1 of a few things.More air/fuel/component.Cold air boxes are popular but the way to achieve the goal is to ram air into the engine.This will result in a lean mixture which your cars computer will adjust for.Then in turn if you enlarge fuel injectors(19# injectors can support 300 h.p.)and also get a performance chip this package will result in noticable H.P.Stage 2 chips also want you to get low temp therm.1 step up is add a adj.fuel pressure regulator,or 1 from 89 trans am turbo.So go get more air and fuel through your car.