HP+Torque through Auto and Manual Trans

[Slick Rick]

Hey Guys! I just recently registered but I have been reading posts on this site for maybe a year and a half er so. Why I haven't registered earlier? I dunno, I just didn't bother.


Anyways I have a Q that I don't think has been answered/nobody knows the answer to, but I willl ask anyway. Does anyone know how much HP and Torque is lost through an automatic trans as opposed to the stick shift? I guess the real question is whether 2 people have taken stock X's ( one auto, one man ), put each on a dyno, and compared the results?
Thanx

 

[Slick Rick]

P.S. I am sorry about the length of my signature by the way. Can somebody give me instructions on how to edit it?

 

[Alec]

Your signature is in the profile section, please limit it to 6 lines.

As for % power loss, I'd think you'd lose more with the auto. An auto Explorer loses about 20-25% to the wheels, a manual probably slightly less. And a 4x4 will lose more power also.

 

[Iggy flywheel]

If I remember right think auto loses around 30 % and manual is around 22% at the wheels.

 

[james t]

best standard rule of thumb/guideline- 20% loss with auto, 16% loss with a manual. add another 2% to those figures for 4wd (locked in 2wd) and add another 4% to those figures for AWD. also, the percentage goes up on both with heavier-duty drivelines. example, a 14 bolt rear end on a 1-ton Chevy truck will use up more power than a 8.8 on your explorer, a gear driven transfer case will eat up more hp than a light-duty chain driven one, etc. etc.

 

[Slick Rick]

Yeah, I know that you would lose more power with an auto, because the torque converter eats up quite a bit, and manual don't really have that problem (as much anyway from what I have heard ). But no solid numbers from dyno tests on the stocks? If not that's ok... I guess there is no point in dynoing a stock Explorer with the lame numbers and all right? Oh well, still fun to drive

 

[Alec]

Stock 160 hp rated Xs have consistently produced about 120 on the dyno.