Pontiac Grand Prix Forums : Grandprix

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I Found a 99 S/C Motor An trans for $1200. Just wish I had the money to go and get them right now.

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BEAR
97 Grand Prix GT: 2D/ 3.8 Liter/ AutoMatic/ K&N Cool Air Intake/ Full Magna Flow Exhaust
More to come later

well there are advantages to the top swap such as higher compression

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1998 Gulf Blue GP GTP Daytona Edition #829/1500 The Other Guys Headers + Downpipe, KYB AGX + Eibachs, R.A.S.K. Kit, Otto Strut Tower Bar, PRJ Performance 10.4mm wires, TDC Racing 4" Fender Well Intake, Meizere Electric H2O Pump, Odyssey Battery, Iridium Plugs, 180* Thermostat, Alt Rewire, HPTuners VCM Suite Version 2.2 with my own tune!

Ok... when I took my UIM of my 2000 for the topend swap there was a LARGE dia hose coming out of it. I think it is called Evac. According to some GTP Diagrams this goes to the 3rd (closest to the firewall) vacume tree. Is there an adaptor or part I need to connect the to? Or can some one who has pics of the top swap post them.

And one tree goes to the bypass and the other to nothing or "atmosphere" correct?

Thanks

-KT

The large diameter hose is for your brake booster. You can get a brake booster hose from an L67, or I think you can just make it work.

The middle of the tree is for the vac line for the HVAC system, it's the smaller hose that's connected right next to that big one mentioned earlier.

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2001 Buick Regal LS - Almost Stock

the same hose works. i used the same one.

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98 XGT - sold
06 impreza 2.5i 5 speed - stock, slow, and awesome

How rough should the motor be when you first start it before it adapts and gets use to boost?

You need a new tune. End of story. It can't "adapt" enough if you try to use the same PCM. The best way to do it is start with a L67 file and change it to work with your trans. Then tune fueling and spark as needed to keep it from blowing up.

Mine chattered a little bit as the lifters got pumped up, but even the first start on mine and ever since was perfectly smooth. Runs as good as it did when it rolled off the assembly line if not better.

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2004 Impala LS - got some mods sold!!!
2009 Subaru Impreza WRX STI

NAIOA moderator Still Imp'n, just in a different Imp.

I know I need a tune. I guess my problem is in the MAF... (idles when not pluged in and will die when pluged in) I'm not showing any boost (even when reved up) on the DIC and I am showing 15ish VAC on my mechanical gauge. Couldn't find any Vac. leaks either...

Did you use a L67 PCM and MAP sensor?

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2004 Impala LS - got some mods sold!!!
2009 Subaru Impreza WRX STI

NAIOA moderator Still Imp'n, just in a different Imp.

Yes, I am using a GTP file and a 67 MAP.

My digital DIC is showing no boost periord. Though my mechanical Autometer gauge is holding at 15psi VAC and after I reved up, I am hitting 20-22 VAC.

We hooked it up to an HPtuner and my MAF is still giving me a reading but, is way off. When it is connected/plugged back in it will kill the car.

About the MAF it is my old 2000 one, just put it on a 67 TB.

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Almost There. Wanted: PRJ Fuel Rails, F1 Spoiler.

You probably need a new MAF. If you're getting no boost I'd look to make sure the BBV is operating properly and not stuck open.

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2004 Impala LS - got some mods sold!!!
2009 Subaru Impreza WRX STI

NAIOA moderator Still Imp'n, just in a different Imp.

does any one have pictures of the location of the series 3 supercharged motor???

I'm pretty sure the motor is in the engine bay...

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2004 Impala LS - got some mods sold!!!
2009 Subaru Impreza WRX STI

NAIOA moderator Still Imp'n, just in a different Imp.

can i swap my n/a for a supercharged?

Yes... read page 1

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Almost There. Wanted: PRJ Fuel Rails, F1 Spoiler.

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2002 GT...Wizardair, ZZP 2.5 o/r dp, Special Eddition two-tone leather interior added, HUD added, 12" Brake Upgrade,strut tower bars, gmpp sway bars, poly motor mounts, -6an braided SS fuel hoses , Hptuned, Headers, Top Swaped.....
I've got Boost!! Top swap Quesions? Click Here

So I've been reading up on this, and I'm very interested in doing it, but has anything thrown out an approx/avg cost involved in doing this? I have an 04 grand prix gt that I'd love to do a top swap on, just looking for a little better idea of the money involved before commiting to something... as all mods are based on budgets. haha

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Bruce Benner - Niagara Region, Ontario, Canada
2004 Grand Prix GT2 - Tinted Windows,Tail lights, 20" Velocity VW166 rims...

contact ed morad parts..google it...and email him asking for his top swap kit and he will hook you up

Did you really post that in the Top Swap thread?

Jesus, some people's kids.

Morad Parts Company - 3800 Motors, Transaxles, & Stock Parts

Just tell Ed that your part of the national grand prix forum and he'll set you straight.

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2003 Blue-Black Metallic GTP Sedan - Almost Done...
2007 Gold Mist Chevrolet Cobalt LT - Custom CAI, NGK V-Power's, Muffler Delete, Custom Tuned PCM...Sure does have every bit of 130 FWHP
http://www.cardomain.com/id/03blueGTP

Ed quoted me $1100 for all the hard parts...plus shipping.

The labor would be murder if you take it to a shop though.