i have full 2.5 in exhaust and pacesetter header. c.a.i motor/trans mounts. strut bar lowered short throw and stage two clutch. im doing a turbo build on the spare ecotec motor in my garage this winter. while im waiting would it be worth it to get a tune now or no? like would it be a noticable gain. i know a guy who will hp tune it for under 275( that includes dyno time)
there are gains to be had even on a stock engine through a tune. but for almost 300 dollars, i would wait until your'e boosted to tune.