Originally Posted by seanathanq83
sorry i went out and clarified it was 1 more psi, still help through redline, also 1 more degree at peak torque, and 2 more degree at redline, and better fueling, it was leaned out more this time about .2 across the board. so i can see where the power came from, it just seems that with SD it was easier to get these changes in
^^ Is why. Which is quite possible.
But was the maf tune taken to a verified (not ecu) knock threshold vs the SD tune?
See - really the only comparison would be a road tune of each - using det cans - then put it on the rollers and a quick update of each tune and compare.
Most likely, there is some maf fluctuation (I've noticed in my car load/fueling is much more consistent as the maf tends to wander a bit even with our slow logger)
So having a more consistent combustion to combustion afr is going to allow a bit more boost/timing to be ran on the same fuel. This is all given the maf was a little inconsistent to begin with.