i just bought an 09 civic. to get most possible performance should i tune while stock then retune after each upgrade? or should i just wait on upgrades before tuning?
not sure on upgrades yet. but im thinking intake maybe new exaust and maybe more along the way. i have no tuner, i was going to try to find someplace to do it as i have never done it before
^^
yeah, if you tune with just i/h/e, you wont gain much hp at all. But, they will be able to help your a/f ratios and save you a buck or two at the pump.