quote:Originally posted by JTpantera:
It does seem that 75 to 80 hp is a high number. Perhaps it also accounts for the air filter, higher engine bay temp and full muffler system often not included on a bench dyno.
I can turn my ZF by hand; heck, out of the car, my drill would turn it. I certainly think my 5 hp lawn mower could spool it up pretty nicely, although I admit I've never tried. :^)
I recognize that at higher RPM, it would experience higher frictional losses. It just seems that the figure is overstated. I owned two opels that had 100 hp engines. I don't think 3/4 of their power would have been lost to the ZF. Just doesn't pass the sniff test.
JT
I believe the 75 to 80 horse power loss figure has come from using the 20 percent calculation, which is linear. If you have a Pantera engine with 375 fly wheel horse power, then you will lose about 75 horse power though the drive train. I would love it to be a fixed maximum 75 horse power loss, but after some detailed research, it is based on a percentage. The more horse power you have going into the ZF or any drive train, the more you will lose.
Chassis dyno time is not very expensive and if you really want to know what your Pantera is putting to the ground, then hook it up to one. They don't call those things "The great disappointer" for nothing.