Ebay turbo build
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Junior Member
Joined: Feb 2010
Posts: 54
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From: Spangle washington
Car: 1988 Pontiac Firebird Formula
Engine: TPI 350
Transmission: Brog-warner 5 speed
Axle/Gears: Borg-Warner 9 bolt 3.45 posi
Ebay turbo build
This summer im looking to put twins on my 88 firebird just somthing mild wanted to ask you experts here for your 
http://cgi.ebay.com/ebaymotors/SBC-2...Q5fAccessories
Anything opinions are cool thanks

http://cgi.ebay.com/ebaymotors/SBC-2...Q5fAccessories
Anything opinions are cool thanks
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Posts: 2,565
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From: Texas
Car: 1992 Formula Firebird
Engine: 305CID (LB9)
Transmission: World Class T5
Axle/Gears: 10-bolt, 4.10 gears
Re: Ebay turbo build
Well I'm no expert but the Ebay Turbo kits generally work but they are not smooth installations. The turbo manifolds usually leave something to be desired and many of the other parts are junk. The turbos themselves are Chinese knock offs but some people to get good results with them. There is no telling how long they'll last though.
I can see the attraction of these kits but frankly you get what you pay for. I'd go look for some used BBS Designs turbo headers if you don't want to custom build them yourself and get a real turbo from a reputable manufacturer.
I can see the attraction of these kits but frankly you get what you pay for. I'd go look for some used BBS Designs turbo headers if you don't want to custom build them yourself and get a real turbo from a reputable manufacturer.
Thread Starter
Junior Member
Joined: Feb 2010
Posts: 54
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From: Spangle washington
Car: 1988 Pontiac Firebird Formula
Engine: TPI 350
Transmission: Brog-warner 5 speed
Axle/Gears: Borg-Warner 9 bolt 3.45 posi
Re: Ebay turbo build
OK thanks ill look in to them
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iTrader: (1)
Joined: Sep 2002
Posts: 2,565
Likes: 10
From: Texas
Car: 1992 Formula Firebird
Engine: 305CID (LB9)
Transmission: World Class T5
Axle/Gears: 10-bolt, 4.10 gears
Re: Ebay turbo build
Turbonetics and Garrett seem to be the most popular choices for turbos. I'm looking at the Turbonetics T-76 myself.
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Joined: Jan 2009
Posts: 959
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From: Houston TX
Car: 02 SS
Engine: 408 TT (1108rw-93/m1)6700rpm
Transmission: TH400(slipping)
Axle/Gears: 12bolt/3.42(whines😠)
Re: Ebay turbo build
ive built many turbo systems around master power turbos. for the $ a mpt70 cant be beat. ive had good succes with a guy that sells wastegates on ebay. got one on a remote mount lt1 car and another on 5.0 stang. front mount. both use mpt70 turbos.
the wastegates are 38mm.
i have a new one that im not using fs. 75$ shipped.
pics of it to email
the wastegates are 38mm.
i have a new one that im not using fs. 75$ shipped.
pics of it to email
Thread Starter
Junior Member
Joined: Feb 2010
Posts: 54
Likes: 0
From: Spangle washington
Car: 1988 Pontiac Firebird Formula
Engine: TPI 350
Transmission: Brog-warner 5 speed
Axle/Gears: Borg-Warner 9 bolt 3.45 posi
Re: Ebay turbo build
what do you guys think about the t3 or t4 hybrids ive been reading in to them and they seem like somthing i would want for a low boost application with a stock bottom in
Supreme Member



Joined: Mar 2001
Posts: 3,306
Likes: 77
From: Fl
Car: 5.3L turbo 2800lbs RWD
Engine: Prefer 3L Iron & 5.3L Aluminum
Transmission: 4l80e
Axle/Gears: 3.512
Re: Ebay turbo build
If you want to use Ebay manifolds they are a great cost saver... But I would have a welder REINFORCE them, heat them up in all the welded areas and add filler material, careful not to overheat them, find someone that is good at welding stainless (poor quality material at that!)
they will look ugly as hell, but they are great templates for the cost.
they will look ugly as hell, but they are great templates for the cost.
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Joined: Apr 2008
Posts: 10,401
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From: Utah
Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: Ebay turbo build
if u want to go ebay setup i recomend getting the twin turbo front mount headers.not the ones that go over the valve covers. the ds eader will need a lil modification to clear the steering arm.
then use those to build a crossover tube to a single turbo. guys over n the turbo forums have been using those ebay headers this way for a while and have had great success with them.
and if u wanted to stick with an ebay turbo check this out
76mm turbo for 330 shiped
http://cgi.ebay.com/ebaymotors/3-Per...item20b0e411ea
much better deal then the ebay gt45 for 300 which is only a 68mm turbo
then use those to build a crossover tube to a single turbo. guys over n the turbo forums have been using those ebay headers this way for a while and have had great success with them.
and if u wanted to stick with an ebay turbo check this out
76mm turbo for 330 shiped
http://cgi.ebay.com/ebaymotors/3-Per...item20b0e411ea
much better deal then the ebay gt45 for 300 which is only a 68mm turbo
Thread Starter
Junior Member
Joined: Feb 2010
Posts: 54
Likes: 0
From: Spangle washington
Car: 1988 Pontiac Firebird Formula
Engine: TPI 350
Transmission: Brog-warner 5 speed
Axle/Gears: Borg-Warner 9 bolt 3.45 posi
Re: Ebay turbo build
first of all thanks alot for the help
I was told that i should make them stronger i will see about finding a guy over here to weld them up a little stronger. My uncle told me i could run a extra bar for support from were the turbo bolts on to the block or to the frame if i used solid motor mounts. He said it should help with it, because the turbos are pretty heavy and they are just hanging out there by just the header.
I was told that i should make them stronger i will see about finding a guy over here to weld them up a little stronger. My uncle told me i could run a extra bar for support from were the turbo bolts on to the block or to the frame if i used solid motor mounts. He said it should help with it, because the turbos are pretty heavy and they are just hanging out there by just the header.
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iTrader: (1)
Joined: Jan 2002
Posts: 4,432
Likes: 1
From: garage
Engine: 3xx ci tubo
Transmission: 4L60E & 4L80E
Re: Ebay turbo build
if u want to go ebay setup i recomend getting the twin turbo front mount headers.not the ones that go over the valve covers. the ds eader will need a lil modification to clear the steering arm.
then use those to build a crossover tube to a single turbo. guys over n the turbo forums have been using those ebay headers this way for a while and have had great success with them.
and if u wanted to stick with an ebay turbo check this out
76mm turbo for 330 shiped
http://cgi.ebay.com/ebaymotors/3-Per...item20b0e411ea
much better deal then the ebay gt45 for 300 which is only a 68mm turbo
then use those to build a crossover tube to a single turbo. guys over n the turbo forums have been using those ebay headers this way for a while and have had great success with them.
and if u wanted to stick with an ebay turbo check this out
76mm turbo for 330 shiped
http://cgi.ebay.com/ebaymotors/3-Per...item20b0e411ea
much better deal then the ebay gt45 for 300 which is only a 68mm turbo
If it really is a 76mm inducer with a decent exhaust wheel then that is a good deal with the 1.04 A/R turbine.
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iTrader: (1)
Joined: Jan 2002
Posts: 4,432
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From: garage
Engine: 3xx ci tubo
Transmission: 4L60E & 4L80E
Re: Ebay turbo build
The picture of the 76mm inducer shows it has those funky holes in the housing. They look cool, but I only see them disrupting airflow and making the compressor less efficient. I don't know why they put them there because you can't see them with an air filter on it.
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iTrader: (1)
Joined: Apr 2008
Posts: 10,401
Likes: 5
From: Utah
Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: Ebay turbo build
there are 2 of those turbos one is a true 74mm and the one i listed is a true 76mm inducer i had some pics f them when i find them ill post them up
Joined: Jul 2003
Posts: 10,532
Likes: 204
From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Re: Ebay turbo build
Originally Posted by ZEXY
I was told that i should make them stronger....


Supreme Member
iTrader: (1)
Joined: Apr 2008
Posts: 10,401
Likes: 5
From: Utah
Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: Ebay turbo build
http://cgi.ebay.com/ebaymotors/ws/eB...13434571216778
prolly the same tubo as the cheaper one just with a diff set of housings
Senior Member

Joined: Nov 2008
Posts: 586
Likes: 1
From: Las Vegas, Nevada
Car: 1988 Trans Am GTA
Engine: 350TPI
Transmission: 700R4
Axle/Gears: 3:27
Re: Ebay turbo build
I would like to put that kit on my GTA even. I bet it would make my healthy L98 pull like no other... This kit, SLP runners, some plenum porting, and a new intake manifold would be a monster... imagine punching it from a stoplight with the tires just screaming, smoke pouring out, and the the turbos just whistling away... How hard would this kit be to install for a beginner. I would have the turbo headers installed by someone else, would everything else be easy?
Last edited by BigBadGTA; Jun 1, 2010 at 09:40 PM.
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Posts: 1,777
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From: Central Connecticut
Car: 91 Trans Am 'vert
Engine: LB9
Transmission: T5
Axle/Gears: 3.45 9 bolt
Re: Ebay turbo build
subscribing... i have a 91 TA vert with a 305 TPI that I'm considering boosting so I'm interested to see how this plays out. Do you think it would be worthwhile on my car?
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