I have a 1990 Mustang Gt Convertible...I took my friends advise and installed Mac 1 5/8 unequal length headers, underdrive pulleys, BBK X-Pipe with NO CATS, smog pump was taken off. In fender free flow air filter, Hot coil, aftermarket cap and rotor, and aftermarket cables. It still has the stock mufflers.

After installing all of this..the car has lost most of its low end torque. To back it out of the garage I have to accelerate it so it will pick up speed. If I downshift into 2nd..it gets really slow...On the highway...ITS GREAT...but this low end torque deal sucks...

I have been told everything, Install a 3:55 or 3:73 rear end to compensate...Take off the Mac 1 5/8" headers and go with 1 1/2" instead since it is a convertible and is heavier...some say...I should have never gone with the 2 1/2" X-pipe....

I DONT KNOW WHAT TO BELIEVE!!!!!!

HELP!!!

ASKERNIE
Ernie Fuentes

 

is it needed to post this topic twice?

 

He's posted it at least 3 times

 

Slap on the 3.73's or 4:10's (even better) and your problem will be solved. I'd go with the 3.73's for lots of highway driving.