i was just lookin around the ford website looking for other cars using the 4.0 to see if there was a possible cheap head swap option for some extra POWAH! and i saw that the sport trac uses the 4.0 with exactly the same specs, but is rated at 257 ft lbs....? is that from a different tune do you think? The hp is exactly the same 210 at peak...anyone know?

edit: i just noticed it's the same deal with the explorer. someone detuned to keep gt sales up [&:]

 

HmmI just check it out...interesting...I looked at the explorer engine and the intake mani looks different along with a few other things.

 

257 ft-lbs at what RPM? Is the Mustang tuned and designed to build max torque at lower RPM?

 

mustang makes peak torque (240) at 3500...the sport trac makes 257 at 3700....do you think they just rated it at a different point or really did limit it a bit?

 

ehhh....would make sense from a marketing standpoint to keep GT sales up by slightly detuning the 4.0 stang. It's also probably cheaper for them to make. Looks like Ford knows what they're doin lol.
-jerseyfury

 

does anyone know where a stock dyno for an 05+ sport trac can be found? this is bothering me. Either the 4.0 in the stang is detuned stock and that;s why we can gain so much with bolt ons, or we are udnerrated stock...if the ratings were at the same rpm or very different rpm's for peak numbers i wouldn't think about this so much, but 200 rpm difference...?

 

Maybe not just a different tune but cam's as well. You never know different head design.

 

it may have to do with something for more torque for the trucks? maybe

all i know is that like in mercedes the (55 amg) engine has differnet horse in each car (maybe just a function of smaller mods on each)

 

they have different computer controls
ours is eev-v
and the sport trac is eec-v with intergrated edis

 

I belive theSport Trac runs a different exhaust, intake and tunevs the Mustang anditsmost likelythetune is the main reason, the LR is also is rated higher at 269 lb ft. Remember these are (awd ) trucks so mostly Ford imo wanted them tuned for more torque and sacafice onthe other end.

B.amachips alsohas a torque tunewhich gives you more torque down low but you sacafice on the other end of the rpm range vs his other (performancw & race)tunesI tried his the torque tune nice butI perfer his race tune any day becuase of its betterperformance thought out the rpm range.

I would also like to see a real dyno (data)on these trucks so we can see it and look at the whole rpm range compared to a Mutang tune.