98MustangGT

I have 98 Mustang GT. I got underdrive pulleys, Catback exhaust, Fuel Injection Performance Kit (FIPK) with K/N filter, 70mm Throttle body, Ford Racing chip, Pro 5.0 shifter, Eibach springs and Subframe Connectors, JBA Cat4wardHeaders and 3.73 gears on her. I plan on adding an MSD Ignition in a few weeks. I recently raced it before i added the gears and headers and only averaged 10.1@70MPR on 1/8 of a mile track. What else can i add to improve performance / HorsePower and my time at the track? I eventually want to add NOS or a supercharger but i want try more Bolt on's before i go that route. Any help or ideas will be greatly appreciated.

w11988

PI heads without a doubt.

tarpymac

i have 98 gt please tell me you are faster than that.mac cold air, 75 mm throttle body, intake spacer, msd ignition, hypertech programmer, mac racers choice shifter, mac off road h pipe, flows 2 chamber.

2000GT4.6

Not having PI heads is killing you. Slap on a set of PIs and you should be in great shape for a supercharger/n2o in the future. What all did the FIPK come with? I am unfamilar with this product. If it didnt have a inlet pipe, upper plenum, or mam replace these as well.

BTW, how do you like the subframe connectors? I have been thinking of getting them for my car, but am unsure if it's worth the trouble.

SilverGTV8

Your 1/8 time seems kind of slow. I imagine you would be running in the high 14's with your set-up putting you 1/8 times around 9.7. What are you 60's? R u having touble getting out of the hole?

And yes PI's would be the next place to go.

jdaniel

Sorry to ask such a dumb question but I cant figure out what N/A and PI heads stand for. Someone please explain and everyone please forgive my ignorance.

Razor19

N/A = Naturally Aspirated which is when you arent running a supercharger or turbocharger

Not sure what PI stands for. 94-98 Mustangs have NPI heads and 99+ have PI heads. The PI heads are much better because they arent made out of cheap plastic like the NPI heads are.

w11988

PI stands for Performance Improved. It's not really a matter of plastic. The PI heads have re-designed air intake ports to allow better/more air flow. The PI heads on the 99+ models are basically why the HP jumped from 225 to 260 from 98 to 99 models.

Casper98GT

Hey. I have my mods listed below. And i went to a local strip with silverGT a local guy. And i made the 1/8 mile about the same as you. With a 1/4 time of about 15.2. Im going again, with DOT slicks and see what i can get. Because like someone said before, its a matter of getting out of the hole. I know i can be in the high 14's before next month. Then im getting underdrive pulleys and upper intake, MAF, and throttle body

jdaniel

Cool, how much do those run and what extra do you have to buy in order to install them? Thats a lot of H.P.