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Power Adder Getting a Supercharger or Turbocharger? Thinking about using Nitrous? All forced induction and N2O topics discussed here.

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Old 05-06-2009, 11:52 PM   #1
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Join Date: Sep 2003
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Car: 1988 firebird trans am GTA
Engine: 5.7L w/hsr
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quick tpi manifold turbo question

Hi all,

I am doing a single turbo on a tpi engine.. i'm wondering if i would see any benifit going with a less complicated setup like a tpis mini-ram intake or stealth ram. there are 6 gaskets between the runners, plenum and intake on a tpi setup, none on a mini ram and two on a stealth ram.

my l98 is basically stock, so it would be stock heads and cam to start out. I'm only going to run between 6-8lbs of boost to start, but i'm kind of questioning how much trouble i'm going to run into trying to make sure my tpi setup will maintain a good seal under boost. stealth is 550 new, i can score a used miniram setup for about 650 and i already have an edelbrock runner/intake combo that i have done some porting on. which would best fit my application?

thanks all
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mods: holley stealth ram, 58mm performance products throttle body, bosche 24lb injectors (fuelinjectorconnection.com), accel 300 ignition, rebuilt 700r4 w/2800 stall converter from cti converters, 1.6 roller rockers, ported/polished 083 heads with 2.02/1.6, heddman headers & y-pipe, lc1 wideband.
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Old 05-07-2009, 01:14 AM   #2
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Car: 1987 Iroc
Engine: Single Turbo TPI 5.7 - Megasquirt
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Re: quick tpi manifold turbo question

You won't see any problems with leaks. There are stock intake tpi turbo setups out there running 9's. A friend of mine has a 20 psi turbo tpi setup that works fantastic.

The only downside that comes to mind is the effort involved in getting to the injectors, which I get to do this week on mine.
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Old 05-08-2009, 06:12 PM   #3
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Re: quick tpi manifold turbo question

Leaks are no problem. I've run 18lbs through mine without any issues. 20 inches of idle vacuum is, I believe like 10lbs of out sideair trying top get in. TPI & turbos rock! Mark
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Old 05-08-2009, 06:12 PM
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