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Tips to make my 91 GTA 350 TPI faster

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Old Apr 30, 2008 | 03:48 AM
  #1  
jay davis's Avatar
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Tips to make my 91 GTA 350 TPI faster

My GTA is running a 13.86 in the 1/4 its bone stock with 79.000 miles on it,what do I need to beat these mustang cobras,a supercharger, turbo, I need some direction
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Old Apr 30, 2008 | 07:45 AM
  #2  
89IrocZ350TPI's Avatar
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Car: ws6
Engine: ls1
Transmission: m6
Axle/Gears: 3.42
Re: Tips to make my 91 GTA 350 TPI faster

I am finding it hard to believe you are running 13.8 stock Got any slips?
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Old Apr 30, 2008 | 01:42 PM
  #3  
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From: Huntley, Il
Car: 89 ws6
Engine: 355 afr195, hsr,gmpp cam, hs rr,
Transmission: t-5
Axle/Gears: 3.08
Re: Tips to make my 91 GTA 350 TPI faster

Originally Posted by 89IrocZ350TPI
I am finding it hard to believe you are running 13.8 stock Got any slips?
I second that. I would be more than willing to give suggestions, it is very hard to believe a GTA which are the heaviest third gens is running that with out some help.
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Old Apr 30, 2008 | 05:18 PM
  #4  
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Re: Tips to make my 91 GTA 350 TPI faster

I have three slips from saturday 13.86 91mph on a .510 light,was the best run, 14.04 slowest the trans is a TCI but that makes no difference no signs of any motor work other than a EGR replacement and I took the TPI off to clean it out and the EGR port was plugged it was a 1 owner car and ger husband passed so I have no info on this ride
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Old Apr 30, 2008 | 05:54 PM
  #5  
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From: Santa Ana CA
Car: 1991 GTA
Engine: 350 tPI
Transmission: 700r4
Axle/Gears: 342
Re: Tips to make my 91 GTA 350 TPI faster

Does it have headers?
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Old Apr 30, 2008 | 06:01 PM
  #6  
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Re: Tips to make my 91 GTA 350 TPI faster

yes it has headers im assuming factory because my 89 GTA had them
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Old May 1, 2008 | 03:16 PM
  #7  
89IrocZ350TPI's Avatar
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Car: ws6
Engine: ls1
Transmission: m6
Axle/Gears: 3.42
Re: Tips to make my 91 GTA 350 TPI faster

https://www.thirdgen.org/forums/afte...tml?highlight=


This should help
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Old May 1, 2008 | 03:35 PM
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Re: Tips to make my 91 GTA 350 TPI faster

Headers arent factory. Who knows what else is going on under there.
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Old May 2, 2008 | 03:53 AM
  #9  
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Re: Tips to make my 91 GTA 350 TPI faster

I appreciate your help,my friend has a 94 Z LT1,the day I bought the car we went out and ran them, out of the hole or from a 20 mph punch he can not hang wth me its always me by a couple of feet,I take it to the track and run the **** out of it and get excellent results ,I will do these add ons instead of a supercharger and see what happens,my town consist of mustang cobras,im the only old school T/A and I want to run these dudes in the pavement,thanks again.
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Old May 2, 2008 | 07:37 AM
  #10  
89IrocZ350TPI's Avatar
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Car: ws6
Engine: ls1
Transmission: m6
Axle/Gears: 3.42
Re: Tips to make my 91 GTA 350 TPI faster

I really dont think your car can be stock. 13.8 is just insane for a stock L98. You SHOULD be running 14.4ish at around 96. Maybe you have a cam in there w/ported heads or something.
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Old May 2, 2008 | 08:26 PM
  #11  
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From: ny
Car: 89 Formula
Engine: LB9 TPI
Transmission: 700R4
Axle/Gears: 3.73(coming soon)
Re: Tips to make my 91 GTA 350 TPI faster

lol proli a cam and a BUILT tranny with gears...theres NO way a stock l98 will run with a lt1 car and run 13.8 or w/e.......sounds like you found sumthin modded with a sleeper look lol.....
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