Originally Posted by Scott Cook

We aren't sure what percentage to use for drivetrain loss in this case. The torque converter stalls between 4,250 and 4,500 RPM so it'* eating up a TON of power. Notice that we only reached ~ 100 mph in third gear. That'* a good illustration of how much power the converter is absorbing. And we dynoed on huge drag slicks, which also eat power. For these reasons, it'* probably quite realistic/conservative to use a drivetrain loss figure of 20%. Using this percentage, 773.2 / 0.80 = 966 crankshaft horsepower . It might actually be more or less, but we think it'* safe to say that our cam, heads and tuning are getting the job done.