TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
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Old Feb 22, 2002 | 10:58 PM
  #1  
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From: Santa Maria Ca
What next

This is what I currently have in my car.

383 stroker
World products heads
Elgin cam lift 420/433
Dur 270/280
Tork master converter 2000 stall
Cat back exaust
Edelbrock TES headers
Limited slip 3.27
24 lb fuel injectors
Touring and handling w/ ws6 pkg
Mellins high volume oil pump
keith black pistons
Aluminum driveshaft
Superchip


My car needs to be faster....can anyone suggest something that would add some decent power?

Its TPi

Nate
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Old Feb 23, 2002 | 10:09 PM
  #2  
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From: Santa Maria Ca
ne1?
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Old Feb 23, 2002 | 10:34 PM
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is it a custom chip?? what about a small shot of NOS. Then you will have the extra power when you need it?
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Old Feb 24, 2002 | 01:54 AM
  #4  
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From: The State of Hockey
Car: 1987 Trans Am GTA
Engine: Miniram'd 383, 24X LS1 PCM
Transmission: TH700R4, 4200 stall
Axle/Gears: 9", 4.33:1
You should run a cam with much more lift than that one has...... Like at least around .490" ish if you don't want to worry about running high end springs, or upwards of .500" lift if you want to run better springs and the heads will accomodate that much lift.

What kind of compression ratio is this engine?

I'm not sure what you have done to the TPI intake setup, but definately port the plenum.... A set of higher flowing runners and a better manifold base will help that 383 breath much better as well.... Port match everything ...... Just keep in mind that a stock TPI setup is not desinged to feed an engine that large so you need to do whatever you can afford to do to help it out in that area. I would have to say that the TES headers are hurting you as well..... the primaries on the TES headers are actually less than 1 1/2" ...... I have a 355 and I am getting rid of the TES on my car very soon in favor of some 1 3/4" SLPs...

And go ahead and get yourself familiar with burning your own PROMs as you will find a lot of power in the PROM - as well as better driveability.

I would have to say that most of that setup appears pretty tame so you have a lot to work with..... Having that 383 as a platform to start with is pretty nice though .

Hope that helps some,
Matt
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Old Feb 24, 2002 | 08:19 AM
  #5  
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From: Amelia, OH, USA
Buddy, if you have a stock TPI set up, YOU NEED SOME SERIOUS UPGRADING.....
Id personally go with an LT1 setup from www.lt1intake.com how about an AFPR and prom tuning
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Old Feb 24, 2002 | 04:25 PM
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From: Santa Maria Ca
well I cant do that because it wownt pass emissions


the Lt1 intake I mean

its at 9:1 compression

Nate
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