[MJN]

Vince

If you really want to understand how your engine combinations are going to perform under full throttle accelleration in the car take the engine outputs from the Dyno software and input them to the Dragstrip software. Now you will be able to understand how weight, traction and gear ratios play into all this and can really make a huge difference. Once you have determined your useable power band for street use, then maximise the average power under the torque curve from redline (say 6,000rpm) to what the revs drop to when you shift gear (say 4,500 rpm). The greatest average torque will give yout the most effective power for the chosen rpm range. If you read any of the John Lingenfelter books on small block C#$*ys this is pretty much what he tries to do. And we all know how successfull he has been at getting blindingly quick accelleration from his project vehicles.

What you will probably find is that the motor that looked the best (highest Torque or HP) on Desktop Dyno is not the one that will work best and give the quickest quarter mile times (or 0 -100mph)with your gear ratios and rear end ratio. Sorry to throw a wrench (spanner) in the works but as you are going to this much trouble might as well go all the way!