- 1,264
Unless you're talking turbostha_con.....Any Import tuner will tell you that even with an engine management system, pulling out 20HP is just not possible.
Most stock turbo cars are tuned way on the safe side of things. Usually tuned to run very rich in high load situations. Rich will waste fuel, but save the motor. But, with some simple tuning, you can get big hp #s from just tuning. With very few mods on my car, swapping to the AEM EMS, and tuning it for 93 oct netted big gains. And now, in its current state, my car makes upwards of 540hp to the wheels (dyno'd in FWD). It's like a whole new motor, runs better now than it did stock. But, again, that is with a turbo application. Tuning a stock natural motor is a whole different animal. Most gains from tuning are minimal. Beneficial, for sure, but minimal.
Hilg