On Oct 25, 11:54 am, "Bill Spiliotopoulos" > wrote:
> I have not seen the dyno results you say, maybe if you could post a link.
> But I have to note, that usually dyno results range from around 2000 rpm and
> up. They don't tell you what is going on bellow 2000 rpm, and most of the
> driving is in the 1200 - 2500 rpm range.
>
> Bill Spiliotopoulos,
> '96 XJ,
> '06 TJ.
>
> "nrs" > wrote in message
>
> oups.com...
>
>
>
> > On Oct 25, 9:40 am, "Jack Carter" >
> > wrote:
> >> A friend tells me that the engine in my new Wrangler is made by
> >> Mitsubushi.
> >> Is he correct? All I've heard is that it's a "good" engine and that it's
> >> used in most Chrysler-made vans and has been around for a long time.
>
> > JP Magazine published a torque and HP curve chart from an independent
> > dyno test showing both the 4.0 and the new 3.8. The curves are just
> > about exactly the same util up high in RPM, then the 3.8 has a bit
> > more torque and hp. I have also read that it takes about 5000 miles
> > to break into this level of performance so in test drives of new
> > vehicles the engine tends to feel sluggish.
>
> > Actually, on paper, the torque curve of the 4.0 is crappy compared to
> > the 258 and even the old L and F head engines in terms of peak torque
> > RPM. However, in practice, jeepers love the 4.0.- Hide quoted text -
>
> - Show quoted text -

Some of my facts were off due to bad memory but here is the link to
the chart. It actually goes to low RPMs.
http://www.jpmagazine.com/projectbui.../photo_03.html