Originally Posted by Jeff@TopGearSolutions
To be honest you are probably leaving some power on the table for top end. You could probably run a bit more boost, especially on methanol or run more ignition.
Back in our day, we were running Procede rev2's with very little taper. IMO, boost north of 6500 is irrelevant, you could make it 8 psi for safety's sake since we should be shifting well short of that on stock turbos.
Now that my flatline is fixed, I can shift at optimal points... it's a great feeling.