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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > Air Induction

Air Induction Performance Air Intake/Air Induction Modifications

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  #1  
Old 03-22-2010, 02:21 AM
andrews03ls andrews03ls is offline
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2003 Chevy TrailBlazer LS
Dark Gray Metallic 4.2L I6 2WD
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Turbo questions

I have an 03 ls still with low miles. Im wanting to turbo it. There is a custom manifold that you can order but i dont trust it. So I was thinking of running a turbo system under my car like they do on the corvettes. I have the turbo already and it is a Garrett GT3071R internal wastegate. If anyone has any suggestions or have already done it themselves any info that you could pass along to me would be greatly appreciated. Thanx
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Old 03-22-2010, 02:23 AM
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Chevy-TB-lover Chevy-TB-lover is offline
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Goodluck, it's possible, but have fun trying to get it tuned right.

You could also search through some threads..
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Old 03-22-2010, 02:32 AM
andrews03ls andrews03ls is offline
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do you have any suggestions on places to tune it. Or should I just say forget it and hook the bottle up to it?
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Old 03-23-2010, 09:28 PM
limequat limequat is offline
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1987 Non-GMT360 Other
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Quote:
Originally Posted by andrews03ls View Post
I have an 03 ls still with low miles. Im wanting to turbo it. There is a custom manifold that you can order but i dont trust it. So I was thinking of running a turbo system under my car like they do on the corvettes. I have the turbo already and it is a Garrett GT3071R internal wastegate. If anyone has any suggestions or have already done it themselves any info that you could pass along to me would be greatly appreciated. Thanx
The steedspeed manifold is a very nice product.

A GT30 is waaaaayyy too small for a 4.2 liter.
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Old 03-23-2010, 10:44 PM
ScarabEpic22 ScarabEpic22 is offline
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Quote:
Originally Posted by andrews03ls View Post
do you have any suggestions on places to tune it. Or should I just say forget it and hook the bottle up to it?
Search for i6 turbo, bet you anything there's 25+ threads on it where Ive gone into detail about why it cannot be done (at least without aftermarket stuff).

Lowdown, cant tune the PCM for boost, second it sees north of 1Bar (14.7psi) you'll get REP and SES lights plus it should put you into limp-home mode.
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Old 03-24-2010, 08:37 AM
limequat limequat is offline
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Quote:
Originally Posted by ScarabEpic22 View Post
Search for i6 turbo, bet you anything there's 25+ threads on it where Ive gone into detail about why it cannot be done (at least without aftermarket stuff).

Lowdown, cant tune the PCM for boost, second it sees north of 1Bar (14.7psi) you'll get REP and SES lights plus it should put you into limp-home mode.
Someone mentioned using a voltage clamp and an additional injector controller in the other thread. Seems like a good idea.
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Old 03-24-2010, 12:43 PM
ScarabEpic22 ScarabEpic22 is offline
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Originally Posted by limequat View Post
Someone mentioned using a voltage clamp and an additional injector controller in the other thread. Seems like a good idea.
Thats the only way Ive seen a factory I6 using the P10 run boost. I dont like it though, Im holding onto my belief that GM electronics can do it, with a little massaging and with ditching the P10 altogether...

Clamp the MAP voltage so the PCM never sees above 1Bar, then once you get into boost have an aftermarket controller control spark and fuel.
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