Red2000SS

How much does horsepower affect stall speed of a given converter?

If you take a converter that stalls @3500 with say 300 RWHP and compare it to its perfomance with a 400 RWHP engine what difference will there be.

I know the stall speed will be higher, but will it be 3550 or 4000???

My initial thought is that drag in the torque converter / transmission is proportional to the velocity (rpm) squared. so with an increase of 33% in horsepower (400 vs. 300) the stall speed would be increased roughly by sqrt(4/3) = 1.1547.

Thus, I would expect a converter that stalls at 3500rpm behind a 300RWHP motor would stall around 4040rpm behind a 400RWHP motor.

This is entirely theoretical, I'm looking for people with real world experience to shed some light on this. Are my expectations realistic, or I am I am I way off base <img src="gr_sad.gif" border="0"> ?

Thanks

ChrisB

You need to be relating it to torque values and not horsepower values.

Other than that I am not sure as to the nature of the relationship other than that it's direct.
e.g. don't know if it's proportional to the ratio, to the square of ratio's, to the ratio squared, etc.


Chris