I have an 04 GT with the following mods: K&N FIPK, Accufab 75mm tb, C&L plenum, Diablo tune, Borla stinger exaust. I was alone in the car, with my new G-tech RR. I do not know the weight of my car, so I guesstimated 3910..( ? ) and I stopped at a redlight. I set the g-tech, and launch. It says that my hp is 178 and my torque is 243. My 1/8 mile is 10.3 and my 0-60 is 8 sec. Is that normal? My car is an auto and I was getting some wheel spin, but not alot. Just want to know if this is normal and what you guys are running.

 

Those G-techs are way off until you set the pitch factor exactly right. My buddy has one. Your 1/8 should be low to mid 9s, mid be the worst scenario.

 

you are about 500-600 pounds lighter than you think. but yeah the hp is off i mean even a bone stock mustang is in the 230-240 hp range to the wheels that is