[swamp2]

@Robert and Madozu. Here is the torque curve I used assuming 369 ft lb (the graph kind of sucks and it would be visually easier to read in Excel but this is how CarTest belches stuff out...).

Ultimately the shape of the curve is not too vital to getting a good simulation. And obviously the sharpness of the peak here in my curve is entirely non physical. Also, if you assume 332 ft lb peak instead of 369 ft lb you do get a more flat torque plateau. The higher peak torque though will have to drop faster less the peak hp number could not be the same...

Either way Pete's curve probably is a more accurate guess. I did not waste any time at all bothering with making a really accurate prediction of this since it makes such littler difference. Get the peaks for torque and hp correct and get the rpms at which the peaks occur and you are pretty good to go.