gtp engine modifications help

[homasote]

i just bought a 98 gtp and i want to make it faster. what mods would give me the most hp? and witch would be the most economical?

[BNaylor]

Welcome to the forum.

It depends on your goals of how much horsepower you want to gain, target ET, etc. Are you referring to bolt on aftermarket parts or are you going to have a shop do the work.










Thrasher CAI, DHP v1.0 PCM, SLP Headers,
3.25 SC pulley, CAIT GMAF, 2.5 DP/Hi-Flow CAT,
u-bend delete, 160 TS, ZZP Stage 1 72mm TB,
TB spacer, MSD 8.5mm wires, Autolite 103,
Goodyear Gatorback Serp. & SC Belt,
Nitto NT555R Drag Radials
1/4 ET: 13.210 sec. @ 104.490 mph
0 - 60 ft: 1.945 sec.

[stlwagon]

U-bend delete, smaller s/c pulley and cold air intake would give you a good start for under $500.

[BNaylor]

Originally Posted by stlwagon

U-bend delete, smaller s/c pulley and cold air intake would give you a good start for under $500.

Assuming $500 is his initial budget, I'm sure he can squeeze in a hi-flow CAT convertor in there someplace.








Thrasher CAI, DHP v1.0 PCM, SLP Headers,
3.25 SC pulley, CAIT GMAF, 2.5 DP/Hi-Flow CAT,
u-bend delete, 160 TS, ZZP Stage 1 72mm TB,
TB spacer, MSD 8.5mm wires, Autolite 103,
Goodyear Gatorback Serp. & SC Belt,
Nitto NT555R Drag Radials
1/4 ET: 13.210 sec. @ 104.490 mph
0 - 60 ft: 1.945 sec.

[regalfriend]

With the smaller pulley you want to get colder plugs

[jimmyv-21]

replace the chip with the jet chip- best bang for your buck