ECU Tuning RSX
Here's the deal. I've street tuned my car hard in 3rd gear (on 5spd tranny),
that means going up to 100mph near redline to tune accurately (tuning in 2nd goes too quick, 4th is the same as Type S's 5th gear).
On the street, my AFR is right where I want it, and I never get knocks, if anything...