Originally Posted by 93ls1rx7
Didn't that combination cause fuel cuts and black smoke issues above 130mph?
It did. But it didn't manifest itself in a way that would significantly hurt performance. When the car started fuel cutting, the car would hesitate and I would instantly shift the paddle to drop RPMs. The black smoke was a result of the 100% fuel demand but brief interruptions in power. Fuel cut only occurred at the top of the rev range. As you can see on the day 2 vids there was no black smoke coming out of the back of my car since the new tune reduced power below the fueling capacity.
Maybe I was already close or at the car's fueling limit, and the Y-pipe put me over it. But, it also increased power in the mid-range and would typically only fuel cut in the higher gears like 5th. So there's no doubt that the Y-pipe gave me more power. But yes the results would have been better if there was no fuel cut situation here.