Just wondering how many have tuned near stock C7's, and what you've seen.
I've got one to use as a test mule, and no matter what I do, it will not change HP. moved timing from 18 to 27, and no change. AFR's from low 13's to high 11's, and also no change.
I say no change, but there are single digit swings in power. But less than 5HP, and I call it no change.
And the WOT MAP is dropping from 97-98kpa to 91-92, so I'd say this thing needs uncorked BADLY.
Car only has Pfadt headers. (I don't recommend them now that I've tried them)