Rear wheel horse power

[Dick Steinkamp]

Originally Posted by wmws

Has anyone had there stock A on a rear wheel dino. How much horse power would you expect at the rear wheels?

I haven't had one on a dyno, but commonly quoted is a 15-20% loss flywheel to rear wheels (even more for an auto trans car). Here's a few sources...

https://www.google.com/search?q=hp+l...hrome&ie=UTF-8

Assuming that, you could expect to net 32-34 HP at the rear wheels in "new" Model A. If you aren't making 40 HP at the flywheel (wear, tune, etc) and/or if you have greater powertrain losses (thicker trans/rear end oil, worn parts, etc) you can expect less.

As far as torque goes, it looks like the 128 ft pounds of torque are all in at 1,000 RPM...

http://model-a-ford.org/technical-re...pecifications/

This is likely why why our cars perform so well even with only 40 HP, and why the handbook tells us to shift at relatively low speeds (at or near the torque peak).