Quote:
Originally Posted by Dick Steinkamp
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). |
Yes which is why on new cars/trucks that HP rating is absolutely useless. Take the f150 for example - the 5.0 standard V8 does make something like 385 HP but at 5750 rpm! who the heck drives thier vehicle flat out all the time? Its peak torque is 387 ftlbs at 3875 rpm while the v6 ecoboost has 470 ft/lbs at 3500 while it has 10 less HP at 5K+. That extra 90# of torque really shows on acceleration. (apparently for 2017 they have a H.O ecov6 - 510 ft lbs at only 3500rpm!)
There is a reason a 4 banger honda can smoke a 5.0 mustang - power to weight and torque it can produce.