TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
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Old May 26, 2002 | 10:55 PM
  #1  
1990GTA's Avatar
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Joined: Nov 2001
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From: Orlando,Fl. USA
Car: 1990 GTA
Engine: 5.7 T.P.I.
Transmission: 700r4
Axle/Gears: 3:23
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I am getting long tube headers,true duals with no cats, porting the plenum,AFPR,and removing all smog stuff . I should have $300 to maybe $500 left to spend.What else should I get?I was thinking maybe 24# injectors,or subframe connectors. It is a 90 GTA 5.7,700R4.If anyone suggests cam,wich one,I dont want to have to change springs and crap.THANX for any advice!
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Old May 27, 2002 | 12:28 PM
  #2  
1990GTA's Avatar
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From: Orlando,Fl. USA
Car: 1990 GTA
Engine: 5.7 T.P.I.
Transmission: 700r4
Axle/Gears: 3:23
Is this a stupid question or what ? How come no response?SFC's would be the obvious choice from what I have read on the boards and in books.Am I right?
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Old May 27, 2002 | 12:34 PM
  #3  
Scott 88 GTA's Avatar
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Joined: Jul 1999
Posts: 407
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From: Stuarts Draft, VA
Car: 88 GTA
Engine: modified L98
Transmission: 700r4
Axle/Gears: 3.27 9-bolt
I think the SFC's or injectors would be a good choice.
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Old May 27, 2002 | 06:37 PM
  #4  
John Millican's Avatar
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From: Savannah, GA
Car: 1997 Jeep Wrangler
Engine: 4.0L
Transmission: 5 speed
Axle/Gears: 8.8 rear, 4.56 gears, 4:1 transfer
A stock motor does not need 24 lb injectors. Your 22 lb ones will do nicly till you get a cam and heads on that thing.
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Old May 28, 2002 | 04:40 AM
  #5  
1990GTA's Avatar
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From: Orlando,Fl. USA
Car: 1990 GTA
Engine: 5.7 T.P.I.
Transmission: 700r4
Axle/Gears: 3:23
I think I will go with the SFC's,since the roof is already cracking a little at the top rear of the driver side window from body twist .Thanx for the input!
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Old May 28, 2002 | 08:20 AM
  #6  
ImportsRsloths's Avatar
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Joined: May 2001
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From: Amelia, OH, USA
Id say your biggest HP gain would be a cam like the zz4 cam or TPIS zz9 cam, or maybe even the lt4 hot cam which ever one you can get a good deal on! Id also look at putting some 3.42 gears in back there!
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