SS/SC vs modded 04 GXP (video)
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From: Miami
Uh..it's not a GXP if it's supercharged. The smaller pulley is also NOT what makes us louder, it's the CAI. ANyway, the GXP is an N/A V8 (LS4) the for 05, the GXP wasn't out. In 05, the Comp G was the top end Grand Prix (though the GXP may have came out late 05, and the Comp G and the GXP may have ran at the same time, but I'm fairly certain the GXP didn't come out until april of 06).
EDIT: Watched the video. That is def supercharged and as such, def NOT the GXP. Sorry, you didn't beat the V8
The video descrip says it was an 04 GXP. So it's either an 04 GTP or 05 GTP. I can't tell if it's a Comp G without seeing the badges. Was this you? Did it have painted calipers?
EDIT: Watched the video. That is def supercharged and as such, def NOT the GXP. Sorry, you didn't beat the V8
The video descrip says it was an 04 GXP. So it's either an 04 GTP or 05 GTP. I can't tell if it's a Comp G without seeing the badges. Was this you? Did it have painted calipers?
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Joined: 05-16-07
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From: Riverside, CA
As for the shift kit, basically it is as others have described. It is only for Automatic Transmissions and when used in conjuction with a raise in shift line pressure results in quicker and firmer shifts. I would never buy one from a company since you can basically make one yourself using about $10 in parts from Ace Hardware. Stock, my car took about a quarter of a second to shift. It now takes about 2/100ths of a second to shift. The "wild" setting is not recommended unless you have a really stout transmission and you have to have increased line pressures for it to work right. I wouldn't recommend it. My kit is between medium and firm...and it works great. At the track the shifts are hard and instintanious.
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Joined: 03-22-07
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From: Still fixing others mistakes.
Dear lord there's a lot of stuff flying around here. LOL
GXPs are high 13 cars with a good driver under the right conditions. Problem is they have the same transmission as the GTPs and it's lacking to say the least. Number of GXP folks are already experiancing issues with them because of the power. Also, don't know of many upgrades for them at the moment.
GTPs from 97 until 07 they haven't changed all that much powertrain wise. The Gen V M90 that replaced the Gen III M90 in the 2004 model year redesign added 20 hp to the 97-03's 240 hp but torque remained the same at 280. The 2004+ GPs also experianced a moderate weight gain putting their 1/4 mile times almost identical to the 97-03 versions.
Comp G GTPs (04-05 only I believe) DID NOT have any power upgrades over the standard GTPs. Improvements to suspension as well as the HUD display, paddle shifters, and Stabilitrac Sport stability control were all part of the Comp G package. GTPs, from 97 until 06 (for 07 the GTP badge was dropped and the GT received the Series III Supercharged V6, the L32) run Mid-High 14s and up stock.
If your friend is running 14 flat, he has some mods done to it. Alky could be a possibility and with the few other mods he has I could see him running a 3.5 or 3.4 pulley with Alky. However, Alky is not easy to tune and if he doesn't have a good tune on the car this could be why he's so slow. Regardless, a stock SS/SC Cobalt should take a stock Supercharged Grand Prix.
GXPs are high 13 cars with a good driver under the right conditions. Problem is they have the same transmission as the GTPs and it's lacking to say the least. Number of GXP folks are already experiancing issues with them because of the power. Also, don't know of many upgrades for them at the moment.
GTPs from 97 until 07 they haven't changed all that much powertrain wise. The Gen V M90 that replaced the Gen III M90 in the 2004 model year redesign added 20 hp to the 97-03's 240 hp but torque remained the same at 280. The 2004+ GPs also experianced a moderate weight gain putting their 1/4 mile times almost identical to the 97-03 versions.
Comp G GTPs (04-05 only I believe) DID NOT have any power upgrades over the standard GTPs. Improvements to suspension as well as the HUD display, paddle shifters, and Stabilitrac Sport stability control were all part of the Comp G package. GTPs, from 97 until 06 (for 07 the GTP badge was dropped and the GT received the Series III Supercharged V6, the L32) run Mid-High 14s and up stock.
If your friend is running 14 flat, he has some mods done to it. Alky could be a possibility and with the few other mods he has I could see him running a 3.5 or 3.4 pulley with Alky. However, Alky is not easy to tune and if he doesn't have a good tune on the car this could be why he's so slow. Regardless, a stock SS/SC Cobalt should take a stock Supercharged Grand Prix.
i dumped my gxp because of tranny problems.
brilliant motor. **** tranny.
everything aside from the intake manifold and headers, in the lsx family will work
cam, heads, rockers. so on and so forth. the after market is there. just no one wants to drop the motor to do the cam swap
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Joined: 05-16-07
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From: Riverside, CA
ahhhhhhhhhhh infestation of clubgp!
i dumped my gxp because of tranny problems.
brilliant motor. **** tranny.
everything aside from the intake manifold and headers, in the lsx family will work
cam, heads, rockers. so on and so forth. the after market is there. just no one wants to drop the motor to do the cam swap
i dumped my gxp because of tranny problems.
brilliant motor. **** tranny.
everything aside from the intake manifold and headers, in the lsx family will work
cam, heads, rockers. so on and so forth. the after market is there. just no one wants to drop the motor to do the cam swap
I haven't heard of many GXP guys heavily upgrading their cars so I truely have no clue what can and cannot be done to them other than the issues with headers. But with the tranny that's on that car I can understand owners being leary of raising the power levels of that 5.3.
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Joined: 07-14-06
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From: Virginia
yeah as stated before thats a GTP not a GXP. they are high 14 low 15 second cars stock. what do you mean by a shift kit? does BM make some kind of automatic tranny upgrade?
hmmm what is the actual acceleration difference between a comp g and a reular GTP? what parts are different
hmmm what is the actual acceleration difference between a comp g and a reular GTP? what parts are different
GTPs from 97 until 07 they haven't changed all that much powertrain wise. The Gen V M90 that replaced the Gen III M90 in the 2004 model year redesign added 20 hp to the 97-03's 240 hp but torque remained the same at 280. The 2004+ GPs also experianced a moderate weight gain putting their 1/4 mile times almost identical to the 97-03 versions.
Comp G GTPs (04-05 only I believe) DID NOT have any power upgrades over the standard GTPs. Improvements to suspension as well as the HUD display, paddle shifters, and Stabilitrac Sport stability control were all part of the Comp G package. GTPs, from 97 until 06 (for 07 the GTP badge was dropped and the GT received the Series III Supercharged V6, the L32) run Mid-High 14s and up stock.
Awwwwwwwwwwwww...now why'd you have to go and say that? That's not nice! LOL Besides, I've been scooting around here for a while. Roommate has an Ion RL and I toyed with getting one for a while too. That and I'm not one to run back to CGP crying "HEY, LOOK AT WHAT THE COBALT GUYS ARE SAYIN' YO!!!!!!" Uhg I hate that crap.
I haven't heard of many GXP guys heavily upgrading their cars so I truely have no clue what can and cannot be done to them other than the issues with headers. But with the tranny that's on that car I can understand owners being leary of raising the power levels of that 5.3.
I haven't heard of many GXP guys heavily upgrading their cars so I truely have no clue what can and cannot be done to them other than the issues with headers. But with the tranny that's on that car I can understand owners being leary of raising the power levels of that 5.3.
I don't know a ton about them, but I heard something about their being two computers which makes things difficult? I might be wrong on that. GM should have put a strong trans in it, is what they should have done. But none of this matters when the G8 comes out anyway.
Last edited by Onyx Dragon; Jul 26, 2007 at 07:23 PM. Reason: Automerged Doublepost
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From: PA
Point being that it's not a GXP, however It's a Standard GTP or Comp G S/C V6. If it were a Comp G, it would have likely been closer, but I don't know how badly he was spinning off the line. Either way, with how badly he lost, I'd question his mods other than the intake. Last thing I want is for the GXP folks to get their panties in a wad and flock here like the GTO folks have done 
It's a Standard GTP or Comp G S/C V6. If it were a Comp G, it would have likely been closer, but I don't know how badly he was spinning off the line. Either way, with how badly he lost, I'd question his mods other than the intake. Last thing I want is for the GXP folks to get their panties in a wad and flock here like the GTO folks have done 
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From: troy oh
I'm curious you are saying the gxp is using the same tranny as the gtp? This is still the 4t65 correct? I also agree with the post about the tranny being the weak spot of the gtp's besides the restrictive exhaust. It doesn't take much to make a damn quick gtp it just takes money spent in the right place as with any car.
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From: PA
dude, your car Robotech is badass! Trapping at 112 and E/T of low 12s. Awesome. Wish I could get off the line with a 1.8 60" I would be golden then. I had a GTP kick my ass one time, I was catching him quick once I got traction but off the line he was sick. He had drag radials on. I was always a fan of the GTP and I wanted my wife to get one. She however has a differant opinion about those cars. She would take a balt ss/sc over a GTP anyday. I like them both.
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ahhhhhhhhhhh infestation of clubgp!
i dumped my gxp because of tranny problems.
brilliant motor. **** tranny.
everything aside from the intake manifold and headers, in the lsx family will work
cam, heads, rockers. so on and so forth. the after market is there. just no one wants to drop the motor to do the cam swap
i dumped my gxp because of tranny problems.
brilliant motor. **** tranny.
everything aside from the intake manifold and headers, in the lsx family will work
cam, heads, rockers. so on and so forth. the after market is there. just no one wants to drop the motor to do the cam swap
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Joined: 07-14-06
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From: Virginia
I'm curious you are saying the gxp is using the same tranny as the gtp? This is still the 4t65 correct? I also agree with the post about the tranny being the weak spot of the gtp's besides the restrictive exhaust. It doesn't take much to make a damn quick gtp it just takes money spent in the right place as with any car.
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Joined: 05-16-07
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From: Riverside, CA
But you're certainly right, this was no GXP he raced.
EDIT...since I can't edit the actual post....
Didn't mean no increase in power but no increase in Torque...
Last edited by Robotech; Jul 27, 2007 at 10:22 AM. Reason: Automerged Doublepost
Rent me! per hour
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From: Still fixing others mistakes.
Awwwwwwwwwwwww...now why'd you have to go and say that? That's not nice! LOL Besides, I've been scooting around here for a while. Roommate has an Ion RL and I toyed with getting one for a while too. That and I'm not one to run back to CGP crying "HEY, LOOK AT WHAT THE COBALT GUYS ARE SAYIN' YO!!!!!!" Uhg I hate that crap.
I haven't heard of many GXP guys heavily upgrading their cars so I truely have no clue what can and cannot be done to them other than the issues with headers. But with the tranny that's on that car I can understand owners being leary of raising the power levels of that 5.3.
I haven't heard of many GXP guys heavily upgrading their cars so I truely have no clue what can and cannot be done to them other than the issues with headers. But with the tranny that's on that car I can understand owners being leary of raising the power levels of that 5.3.
before i dumped my gxp it put down 360/421.
other then gtp jay. i have not heard of anyone else doing forced induction IE turbo. i was the only nut case that did nitrous on one.
the gxp camp is not doing to well with the stock trannies. i went through two convertors before i dumped mine.
Last edited by Area47; Jul 27, 2007 at 01:26 PM. Reason: Automerged Doublepost
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From: Virginia
Not so much with the weight gain, no increase in power, and the increase in Torque Managment. I've never seen anything about the 04s being signifigantly faster than the 97-03s.
But you're certainly right, this was no GXP he raced.
EDIT...since I can't edit the actual post....
Didn't mean no increase in power but no increase in Torque...
But you're certainly right, this was no GXP he raced.
EDIT...since I can't edit the actual post....
Didn't mean no increase in power but no increase in Torque...
20 HP..what they DON'T stress to you, is that 20 HP is only when using premium fuel
If you use low octane, you're back to 240, but that's an improvement over the Series II which ONLY runs high octane. There SHOULD be an increase in torque...f'ing computers. I turned off my torque management for fun a couple nights, and what a difference! But yeah, the 3.29 does put it into mid 14's (14.5'ish to 14.7'ish). I ran a 14.5 in below freezing weather, stock tires, and mods being a 3.4 and CAI. Got a TERRIFIC (read saracasm in that) 2.4-2.5 60' at that :P So yeah..I sucked :P Still need to get back to the track damn it. New tires, slight tune, and a DP and high flow cat now. I'm a little paranoid of my trans though, I'd like to get a ZZP trans in it, since I'm around 75K miles now.you can run back there and tell the ls4 guys. it's ok. lol
before i dumped my gxp it put down 360/421.
other then gtp jay. i have not heard of anyone else doing forced induction IE turbo. i was the only nut case that did nitrous on one.
they upgraded the wrong parts. i know this from first had experience.
the gxp camp is not doing to well with the stock trannies. i went through two convertors before i dumped mine.
before i dumped my gxp it put down 360/421.
other then gtp jay. i have not heard of anyone else doing forced induction IE turbo. i was the only nut case that did nitrous on one.
they upgraded the wrong parts. i know this from first had experience.
the gxp camp is not doing to well with the stock trannies. i went through two convertors before i dumped mine.
Last edited by Onyx Dragon; Jul 27, 2007 at 10:03 PM. Reason: Automerged Doublepost
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From: troy oh
I was talking to guy who had a 97 gt who swapped the m90 onto it. It had a 2.8, intercooler, beefier axels and plenty of other things....tog header and headwork. Claimed it ran high 11's. Anyway he told me he had a zzp tranny I think and said it was ****, something happened while they were assembling it and didn't catch the flaw. He saw my car and commented on it. Shortly after that I called him out in why he had guages on his gt. Lol coolest gtp guy I've met in a while.
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Joined: 07-14-06
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From: Virginia
I was talking to guy who had a 97 gt who swapped the m90 onto it. It had a 2.8, intercooler, beefier axels and plenty of other things....tog header and headwork. Claimed it ran high 11's. Anyway he told me he had a zzp tranny I think and said it was ****, something happened while they were assembling it and didn't catch the flaw. He saw my car and commented on it. Shortly after that I called him out in why he had guages on his gt. Lol coolest gtp guy I've met in a while.
I'd be more proud to say I'm a GT guy and be blown than to claim I was a GTP guy As for the trans, well, things happen, but he's full of it. ZZP are pretty good. There was another vendor who blew up a couple engines and then stopped posting on the CGP forums. Pissed off a lot of people, but I hear they are doing better now with other cars, so I guess every parts company goes through a tough time.
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From: Riverside, CA
Buddy of mine has a 98 GTP and with nothing more than a CAI he ran 14.7 at Firebird in Phoenix in 70 degree weather on a 2.1 60'. Like I said, not a huge difference in times with the Series III.
ZZP has had some tranny issues as of late but they are taking care of their customers and that's the important part. Zoomer will make sure to deal with whatever is the causes of the issues as well. Dynotech is the company that did mine and I love this trans.
ZZP has had some tranny issues as of late but they are taking care of their customers and that's the important part. Zoomer will make sure to deal with whatever is the causes of the issues as well. Dynotech is the company that did mine and I love this trans.
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