Pontiac Grand Prix GTP dyno pull 346 whp

1998 Pontiac Grand Prix GTP, XP Cam, 105# springs, ported heads w/ 1.89 intake &1.55 exhaust, SFI overdrive balancer, 8 rib belt, Gen V SC w/ 2.8 pulley, ZZP stage 2 IC, 1/4 phenolic spacer, 78mm TB, 9" K&N cone/ HAI, XS performance headers, SLP loudmouth catback, ZZP oversized radiator, ZZP billet fuel rails, 160 T'stat, PRJ wires, 63# Siemens injectors, E85, PRJ racetronix fuel pump, fuel pump re wire, no cat, balance shaft, egr, AC or evap, rebuilt trans w/ 4340 input shaft, 7/8" chain, 3:29 gears, hardend 4th hub, ZZP alumimum trans pad, Zpack clutches, and more.

Category:

Autos & Vehicles

Tags:

• Supercharger
• Gen V
• dyno
• Grand Prix GTP
• XP cam

[JDMGTP]

so you only gained 28 hp by switching to a Gen V and E85?

[Josh27321]

@JDMGTP yes sir:) that's 28 whp but I have since swapped to a L26 bottom end. 28 whp is a nice gain.

[RobzSS805]

That's very impressive. I saw your car on the ZZP website. I made all the guys drool on a forum I belong too when I showed them under your hood picture. Lol

[Josh27321]

@RobzSS805 Thank you, that's nice to hear.

[RobzSS805]

That sounds sick! What were your numbers?

[Josh27321]

@RobzSS805 346.6 whp on a Mustang Dyno

[crzystve42]

@Josh27321 isnt the E85 in the last gen gtp?

[CheyneStoned]

I...Want to fuck this Grand Prix...Hard...

[Ericsson787]

ya ya sounds nice on the dyno lets see this bitch tear up the streets!

[chronictai]

thats so sick



[Maxmaj1q]

@JDMGTP 20 at the crank, not the wheels. Plus most l67's don't see that much from the blower swap alone. The l32 makes 20 horses over the l67 because of the better flowing exhaust valves, larger throttle body, lighter rods,and other smaller factors that support the gen 5 blower.

[Maxmaj1q]

@AndyXDeath What did you have done, and where did you dyno at. I know 300 whp for a gtp is usually a pretty heavily modded setup. Was that WHP or CHP?

[mrlindberg123]

this would a great car for mom!

[AndyXDeath]

really nice car bud.......wondering y most modded gtps r only putting down that much hp, my lightly modded gtp put down 300whp and 349ftlbs, with a stock tranny, stock heads and cam.......love ur car though, any 1/4 times?

[str8lucks2000GT]

Whered you get the kit for the Gen V swap??

Or did you buy the parts individually

[zipper778]

I saw you at ZZP last March. Your GTP is nice! Keep up the good work man.