Avalanch3

How much hp loss does the auto tranny lose on our drivetrain? Is it 20%? Or is it lower/higher?

Sancho805

lower. S197 autos are not as far off from manny's as most people assume.

illin

Well...actually more than 20%. About 23%. However, the tranny does seem to be quite efficient. Comparing baseline autos and manuals (on the same dyno), the difference is only a couple of ponies either way...they are very close.

My bone stock 6ser (straight from Ford) yielded an average of 176.2 HP at the wheels. That would be a parasitic loss of around 23% (ish). That is, if we believe Ford's numbers of 230 at the crank...you know, in theory and all.

With a canned Diablo 93 firm shift tune, I averaged (3 pulls) 193.4 HP at the wheels.

With my chosen Bama 93 torque, I settled at 188ish...but could not be happier.

jdphillips73

230 at the crank? hmmm....


v6 is 210 right? those numbers dont add up

BWfVA

Yea they, post them at 210 there buddy. I am not trying to be smart, but I mean, its not like they hide it. It also should be able to beat Stock 5.0 SN95 with that kinda power, or be really close. Anyways, it much less I would think. Even thought its a stick, there is a Youtube video of a Stock S197 V6 pulling 187 something on a dyno, and I cant imagine it much more so I mean, with a tune the Autos might be making more.

illin

Ooopsss...bad math and two glasses of wine (not in that order).

So...with 210...that means 16%.

Heck, that is really low.

ccdguy

I have a 2005 with an AFE CAI and Brenspeed 93 tune. Also have a Ninosport dual exhaust. I was able to pull 200 RWHP and 198 TQ on a Mustang Dyno last summer. The N/A 4.0L are pretty good engines. I hate how people look down and make stupid comments about our 4.0 Ponies... You know...?? I mean, how often have you hear, "is that a GT or JUST a V6???" Damn it......!!!

PS. Here is my pull...

http://www.youtube.com/watch?v=AkVM0smx5Js

Norm Peterson

16% is at least within reason. Some engines make a few more HP than claimed, others a few less, and you may have one that started out life a HP or two stronger.


Norm

illin

I agree totally...but just don't get worked up about it.

This past weekend at the track, the 4.0 did just fine averaging just 9/10's slower than the GT. Was it close? No, not really...bu through the 1/8th there was less than a length between the two cars.

The S197 sixxers are exactly on par with the old 5.0's. Allot of folks forget about that. That 5.0 used to be considered a "fast" car...