On Jul 24, 6:06 am, columbotrek > wrote:
> John S. wrote:
> > On Jul 21, 12:16 pm, "C. E. White" >
> > wrote:
> >> I am interested in an estimate of the top speed of the following
> >> version of a 2006 Mustang Coupe with the 4.0L V6 and a manual
> >> transmission. Assume the base model -
>
> >> 1) As delivered. I assume Ford included a speed limit in the PCM
> >> 2) With a chip that removes the speed limit
> >> 3) With a chip, free flowing duals (cat back), and a K&N intake.
>
> >> Would this last combo actually be able to exceed 120 mph?
>
> >> Ed
>
> > As delivered from Ford the V6 is limited to 113 MPH... You don't put a
> > "chip" in this car. You will need to buy a handheld tuner and reflash
> > the car. Most of these will either remove the limiter or allow you to
> > raid the limit. The car should easily be able to hit 120 MPH...
>
> > Besides making sure you have the properly rated tires, I would also be
> > leery of the stock drive shaft... they are pretty much junk... They
> > vibrate like crazy.... also I don't remember exactly when Ford
> > switched but the early drive shafts did NOT use C-clips to hold the u-
> > joints in... instead they were staked in... but eventually the stakes
> > would give way any the drive shafts would come apart... which is very
> > bad thing to happen at 120 MPH... luckily the ones I know of were all
> > on the dyno... but still caused a fair amount of damage...
>
> > Even if you drive shaft is clipped I would still recommend an after
> > market drive shaft if you plan on doing a lot of high speed
> > driving.... I couldn't keep a rear pinion seal in my car until i
> > replaced mine...
>
> Interesting comments. Is the drive shaft on the GT the same as on the
> V6? I have had my S197 GT upwards of 130 on a couple occasions and not
> a hint of any vibration at all.

Nope, GT and V6 are very different driveshafts... the V6 one is a
POS....