n/a gp gt need some suggestions

[kyleheine298]

ok i have a 99 gp gt i have msd coilpacks, taylor 8mm wires with ac plugs, an aftermarket cheapy intake, zzp stage one alternator voltage booster, glass pack instead of a resignator, n straight pipe from there on. i need some ideas and suggestions on how to get more power and make her move a lil faster.

[GAFF]

HV3 and Tune and Down Pipe and Cross over and Plog and Turbo and Top Swap and Ported TB and Cam and Rockers

[99prixgt]

do you want to spend <5

do you want to spend >5

how much?

[cerick08GP]

#1 HV3 insert from ZZP, it’s the best "easy" mod I know of for a N/A GP. It is easy to install and gives a very noticeable HP gain above about 4k. The only down side is it costs $200.

#2 A tuned PCM, there have been a hundred threads on which ones are “good”. But honestly with an N/A engine the differences are probably very minor. Just be aware that with a tune comes the need for premium gas. Also, all/most of the standard tunes assume you have gone to a 180F t-stat. But IMHO I’d pop for the stock t-stat option for the tune. But again, pros and cons between t-stats is another age old discussion.

#3 Do more exhaust work: a U-bend delete and have your front exhaust manifold ported or install the PLOG from ZZP.

If you get all three done and want more, I’d look to the valve train.

[Poil336]

top swap.

http://www.grandprixforums.net/f81/s...car-17482.html

[nascartech]

well my car ran a 16.5 stock i did down pipe plog hv3 and a cone filter and ran a 15.4 but if you have tune u could get 15-15.2 time which is not bad

[Rather B Blown]

well my car ran a 16.5 stock i did down pipe plog hv3 and a cone filter and ran a 15.4 but if you have tune u could get 15-15.2 time which is not bad

thats pretty impressive. you dropped more than a second off your et with some exhaust work and an hv3

[rynoman03]

Still slow IMO. Sell your MSD coils and go back to stock so you can afford some mufflers. I'm sure your car doesn't sound good at all with one glasspack and no mufflers.

MSD coils are a waste of money when the stockers provide more than enough spark.

As for performance gains. Do a top-swap or go Turbo because no matter how much you mod a GT motor it's still a GT & still slow until you boost it.

I'm not trying to disappoint or pick on ya I'm just stating the truth and giving you options.

[nascartech]

ya i was surprised i picked up over a second im gunna get an overkill ecu and i have l67 tb and injector wich i got for 30 bucks its nice when u car run with a mustang and u have a v6 lol

[suprchrgd]

here would be a good start:

http://www.grandprixforums.net/f49/g...8-a-29922.html

[blueguy]

here would be a good start:

http://www.grandprixforums.net/f49/g...8-a-29922.html

Sorry for the thread jack but I want your car.

Kthnx

[Poil336]

here would be a good start:

http://www.grandprixforums.net/f49/g...8-a-29922.html

agree with blue. i also posted a link to your for sale thread in a different guy's thread asking more or less the same thing

[suprchrgd]

agree with blue. i also posted a link to your for sale thread in a different guy's thread asking more or less the same thing

thanks...

[Poil336]

if it's still around at the end of the summer, i might just have to talk to you about it haha

[kyleheine298]

alrite n yeah i know its only a gt i didnt get it to go fast i got it cuz i like the look of it n sounds good with a systm n plus needed a family car for my daughter but thanks everyone for the tips