Custom TGP exhaust - the beginnings

Started by GOT2B GM, July 10, 2008, 12:03:18 PM

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GOT2B GM

QTP electric exhaust cutout

2.5" SS cutout pipe

2.5" SS Cat- brand new off of an SRT 8

2.5" polished SS Vibrant 18" resonator

2.5" SLP gold firehawk tips











Still need to buy: 2.5" SS weld flanges, 3" to 2.5" reducer for between cutout and cat, 2.5" 304 pipe, 2.5" 304 mandrel bends, 2.5" y-pipe.

So far the plan is, I will tack it together in my garage with my fluxcore MIG welder, then take it over to my cousins place and have him TIG it up.


Matt Shantz - 1990 Pontiac Turbo Grand Prix COLD A/C 80K mi, KAZ Hot Tuned, Birchtrax'ed +  a few mods  ......... 14.6829 @ 95.11 mph

grinders_18

Sounds like a great project! Keep us posted, cuz I wanna follow this!

This radio station was renamed Krenzy in honor of the last American hero to whom speed means freedom of the soul. The question is not when he's gonna stop, but who is gonna stop him.

TGed

http://www.tgpforums.com/index.php/topic,5214.msg38936.html#new

-Don't go around saying the world owes you a living; the world owes you nothing; it was here first.-

-Assume nothing, question everything.-

cobracmdr

wow that should be a nice setup :)  I have a similar hacked up version of that exhaust without the cuttouts .......all ghetto style TDC exhaust no mufflers, high flow cat (Meow  :laugh:).....stock resonator......sounds awsome, looks like crap underneath but cant beat the sound!

Ken

1989 Turbo Grand Prix - missed very much!!!!
2010 Camaro 2SS/RS LS3 M6 12.01 @117 mph - Inferno Orange Metallic, long tubes, x pipe, Cat back, all 3" pipe 321 SS, vararam intake, LC-1, diy tune
01 Grand Prix GTP - 3.4 pulley, plog, k&n drop in, u-bend & resonator delete, tuned
03 Suzuki SV650N - zx10 shock, racetech springs/emulators, streetfighter

flybynite

Looks nice   ;)   That should unleash a few ponies....
1989 TGP Pace Car
1990 TGP Red/Tan Leather

GOT2B GM

Magnaflow SS Y-pipe showed up yesterday.

2.5" in and out.



Matt Shantz - 1990 Pontiac Turbo Grand Prix COLD A/C 80K mi, KAZ Hot Tuned, Birchtrax'ed +  a few mods  ......... 14.6829 @ 95.11 mph

GPChief

2004 GTP -  3.8 Blown - Only modding for MPG.
1997 GTP  - 3.8 Blown - Too many mods to list.
1996 GTP - 3.4 DOHC - Twin to my 1997.
1995 SE - soon to be a 3.8 turbo car.
1990 TSTE x 2 white cloth
1990 TSTE x 1 maroon leather
1990 TGP - 5 speed.

GOT2B GM

Just to update this, got in on the mandrel bent SS catback group buy on w-body.com. Its made of 409 SS and is 2.5" piping.

Now I have to wait till spring when the TGP comes out of storage, so I can cut/weld in my resonator, cutout etc and fit it to the car.

Pics of catback.





Will update again in the spring with install pics.


Matt Shantz - 1990 Pontiac Turbo Grand Prix COLD A/C 80K mi, KAZ Hot Tuned, Birchtrax'ed +  a few mods  ......... 14.6829 @ 95.11 mph

flybynite

Quote from: GOT2B GM on January 04, 2009, 12:59:33 PM
Just to update this, got in on the mandrel bent SS catback group buy on w-body.com. Its made of 409 SS and is 2.5" piping.

Now I have to wait till spring when the TGP comes out of storage, so I can cut/weld in my resonator, cutout etc and fit it to the car

Will update again in the spring with install pics.
Mine is very similar but it's 3" from the turbo back till it splits into 2.5 to exit in the stock location... Plus my turbo exhaust side and down pipe will be ceramic coated to help dissipate heat... I love NC winters hardly any bad weather to slow me down...  :icon_mrgreen:
1989 TGP Pace Car
1990 TGP Red/Tan Leather

slick94prix

flybynite, I don't know your car all too well, so correct me for mis-information.

I heard the 3" downpipe wasn't possible in the TGP's? I've not attempted it myself, however if it is certain that it will fit, then it is a definate for mine.
Chris
- 1996 Pontiac Firebird, LT1 T56, 88k miles. Chameleon Blue Green on charcoal cloth. A base bird with a v8 and a manual trans.

- 2000 Bonneville SE: Silver on Charcoal Leather, pretty much every option on an SE. Current situation- Lots of miles and adding more daily

GOT2B GM

Quote from: flybynite on January 04, 2009, 06:33:09 PM
Mine is very similar but it's 3" from the turbo back till it splits into 2.5 to exit in the stock location... Plus my turbo exhaust side and down pipe will be ceramic coated to help dissipate heat... I love NC winters hardly any bad weather to slow me down...  :icon_mrgreen:

Cool man, got any pics?


Matt Shantz - 1990 Pontiac Turbo Grand Prix COLD A/C 80K mi, KAZ Hot Tuned, Birchtrax'ed +  a few mods  ......... 14.6829 @ 95.11 mph

mfewtrail

Get some soundclips when you finish that exhaust Matt. I'd imagine it will probably sound close to mine. All TGP's have just about the same tone no matter what exhaust is on them. :laugh:

Quote from: GOT2B GM on January 04, 2009, 08:59:51 PM
Cool man, got any pics?

Also interested in pics. ;)
'93 SE, '90 Black/tan TGP, & '90 Red/tan TGP

cobracmdr

Adam I'm still interested in the 3" downpipe when you make them.  Hey can someone post up the link to the cat back group buy?  Can you still get them it looks pretty clean.........Ken might be doing some exhaust work on the tgp this year ;)

Ken

1989 Turbo Grand Prix - missed very much!!!!
2010 Camaro 2SS/RS LS3 M6 12.01 @117 mph - Inferno Orange Metallic, long tubes, x pipe, Cat back, all 3" pipe 321 SS, vararam intake, LC-1, diy tune
01 Grand Prix GTP - 3.4 pulley, plog, k&n drop in, u-bend & resonator delete, tuned
03 Suzuki SV650N - zx10 shock, racetech springs/emulators, streetfighter

flybynite

#13
Quote from: slick94prix on January 04, 2009, 07:48:59 PM
flybynite, I don't know your car all too well, so correct me for mis-information.

I heard the 3" downpipe wasn't possible in the TGP's? I've not attempted it myself, however if it is certain that it will fit, then it is a definate for mine.
Yes a 3" down pipe is pretty much impossible with the auto unless you are creative. So I will keep the turbine and wastegate exhaust flow separated till it passes between the cradle and tranny then it will merge into a single stick of 3". The 5-speed ones, I will keep them separated for at least 18" down from the turbo. By doing it this way you don't half to worry about them trying to flow together right after the turbo thus allowing your turbo to spool more quickly and have less of a restriction on the turbine wheel at high rpms.. ;)   I have no pics as of yet.. My TGP is on the lift and is missing it's auto right now. So be patient and I will get some up soon...

Quote from: cobracmdr on January 05, 2009, 06:27:02 AM
Adam I'm still interested in the 3" downpipe when you make them. 

Ken
No problem Ken, You will be one of the first to see...  :icon_cool:
1989 TGP Pace Car
1990 TGP Red/Tan Leather

slick94prix

Quote from: flybynite on January 05, 2009, 05:43:03 PM
Yes a 3" down pipe is pretty much impossible with the auto unless you are creative. So I will keep the turbine and wastegate exhaust flow separated till it passes between the cradle and tranny then it will merge into a single stick of 3". The 5-speed ones, I will keep them separated for at least 18" down from the turbo. By doing it this way you don't half to worry about them trying to flow together right after the turbo thus allowing your turbo to spool more quickly and have less of a restriction on the turbine wheel at high rpms.. ;)   I have no pics as of yet.. My TGP is on the lift and is missing it's auto right now. So be patient and I will get some up soon...
No problem Ken, You will be one of the first to see...  :icon_cool:

Awesome! Well, I'm definately interested to see how it turns out. When do you expect it do be done?
Chris
- 1996 Pontiac Firebird, LT1 T56, 88k miles. Chameleon Blue Green on charcoal cloth. A base bird with a v8 and a manual trans.

- 2000 Bonneville SE: Silver on Charcoal Leather, pretty much every option on an SE. Current situation- Lots of miles and adding more daily