stock rating is 450/510 bhp
my truck made 348/400 rwhp so about 22.6% to drivetrain loss (granted I have the SPD adapters installed too)
upgraded numbers are 410/449 rwhp
so if you take the numbers x 1.22% you get 500/548 bhp
---------- Post added at 06:21 AM ---------- Previous post was at 06:21 AM ----------
yup 91 octane here in commiefornia
The math works like this:
348/450 = .7733
410 / .7733 = 530 horsepower at the crank