94 gt slower than it should be?

[shrades79]

i have a 94 gt aode with the following mods: CAI with K&N Filter, BBK equal length shortie headers, BBK o/r h- pipe, flowmaster mufflers, shift kit, 4:10 gears, ford racing plug wires and coil. My car ran a 15.3 at 90 mph and i also weigh 230 pounds. the car shifts at 5k i took the car and had the timing redone thinking it would run better after that but it didnt make a big difference they also installed a adjustable fuel pressure regulator. ill have to check on my 60 ft. time again to be exact but i beleive it was a 2.36 or so. Im thinkin about takin it to a dyno and having an sct eleminator chip installed and custom burnt to help my car? would it be worth it

 

[TRUUBLE]

A chip will probably help. Are you getting traction off the line? What kind of tires? How are you launching?

 

[94gtstang50]

Do you have any extra weight in the car? Sub box, spare tire,.....I ran a [email protected] with similar mods, minus gears and shift kit. I also weight 185 though, and weight is a very large factor.

 

[shrades79]

I have no problem with traction i cant get my car to spin em until it shifts to second to me that doesnt seem right to me. i launched with my foot on the break and the o/d off i had a spare tire and a small sub that sets in my spare tire prolly weighs 20 pounds if that....My tires are Falken GR Beta FK-451 255/45 17 brand new at the time

 

[Matt94GT]

hurm with 410s and a shift kit it should be able to spin them easily, unless those tires are super super sticky...? Or I would at least hope/think.

 

[shrades79]

they are not sticky i didnt even do a burnout and still they grabed fine somethin is wrong with my car and im hopin the dyno and a custom chip can help me out?

 

[TRUUBLE]

hmmmmmmm . . . it should spin em off the line . . .. something isn't right here.

 

[shrades79]

the car doesnt feel like it revs up in first gear at all, real slow rpm climbing until about 3 k then she comes to life

 

[TRUUBLE]

I'm thinkin tranny issue . . . but I'm a 5 speed guy. Any automatic guys out there to chime in?

 

[Matt94GT]

Yeah I dont know jack about auto's. I would check for vaccume leaks, what is your timing at?

 

[shrades79]

timing is at stock

 

[Matt94GT]

Do you not want to run premium fuel? If you dont mind I would bump it up to 14* should make a nice diffrence.

 

[shrades79]

only fuel avaible in my small town is 89 other wise its 32 miles for 91

 

[wytstang]

When was the last time you gave it a tune up? including cleaning the mass air sensor?

 

[shrades79]

two days before i went to the strip i gave it new plugs wires and coil, and cleaned the MAF

 

[wytstang]

Fuel filter?

 

[shrades79]

havent checked the fuel filter yet

 

[wytstang]

Don't check replace it if you haven't done so. Also seafoam is your friend $6 bucks to help clean out the motor.

 

[Matt94GT]

hummm, too bad about the fuel have u tried bumping it up? I know I could run my with 89 @ 13* timing just fine without any pinging. 10* is pretty damn low, I would at least try 12*.

 

[94gtstang50]

You should ditch the sub and spare next time you run, it'll help. Mine used to be sluggish off the line with 2.73's but with the 4:10's its a different story, that's really weird. Did yo have any accessories going, a/c, system, heat, headlamps? How aggressive is that shift kit too? I manually shift when I race @ 5,400 rpms. In drive I ran a high 15, "manually" a 15.02 with 2.73's. Were you running 93 octane when you raced it?