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No more than 8lbs of boost..

How to go faster, stop quicker, and turn harder. Chips, exhaust, larger turbos, bigger/slotted/drilled rotors, high performance brake pads, manual boost controllers, performance shocks/struts/springs, airbox mods and more! Also discussion on HID and Xenon lights, aftermarket foglights and other exterior lighting.
Jush
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Jush

No more than 8lbs of boost..

Post by Jush » Wed Jan 22, 2014 10:40 am

I am having a problem with low boost I can not seem to fix, I am getting at most 9lbs. I have a 97 GLT but I happened to come across a 95 turbo ECU so I plopped that in hoping it would spruce up my boost pressure, and to no avail (although the car is faster, still low boost pressure). I have tried everything from tightening the wastegate to eliminating the TCV altogether. I can not find the source of my low boost pressure. ANY advice will be helpful. (my current wastegate is off of a newer xcv70 since mine had been spun at some point and was no longer operating properly)

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c70_lindsay
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c70_lindsay

Re: No more than 8lbs of boost..

Post by c70_lindsay » Wed Jan 22, 2014 6:31 pm

I'm not quite sure about the 850 specifics, how much boost is an 95 turbo supposed to run? It may only be 8lbs of boost.

Jush
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Jush

Re: No more than 8lbs of boost..

Post by Jush » Thu Jan 23, 2014 9:35 am

I've heard people get upwards of 10, around 15 and I would be happy, I just don't know what is preventing it from increasing pressure with all the things I've done.

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matthew1
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matthew1

Re: No more than 8lbs of boost..

Post by matthew1 » Tue Jan 28, 2014 3:10 am

A GLT is a low-pressure turbo, so 8 is correct. If everything is Stage 0, I'd run a manual boost controller, but be warned: it's not if you'll blow your engine but when. Your 850's engine was not made for much more than 8 pounds boost. Yes, there is some margin, but with a nearly 18-year-old engine, anything can happen.
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1997 850 T5, MSD ignition coil, Hallman manual boost controller, injectors, R bumper, OMP strut brace [gone]
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1998v70xcbill
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1998v70xcbill

Re: No more than 8lbs of boost.

Post by 1998v70xcbill » Tue Apr 01, 2014 1:02 am

Matthew1 is right on wiht +8 psig. Go 10% higher at most "at your own risk". Mine pull to high rpms no problem and it's a v70xc.

Bill

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