HHR SS Topics and information on the 2008-2010 Chevy HHR SS Turbocharged models.

boost numbers

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Old 11-20-2008, 05:43 PM
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boost numbers

heard alot of guys saying too low or too high. got problems .

the best i can do is 12psi with no problems

what is the number the computer is set up for. would like to hear what your worst or best is with no issues, good running hhr.
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Old 11-20-2008, 06:17 PM
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That's funny, I was thinking about this today on the way home from work. :)

The best I can do on city streets is about 10psi (70kpa for us Canadians).

Considering the guage goes up to 200kpa, is this OK?
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Old 11-20-2008, 06:19 PM
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For what it's worth, here is a PSI to KPA converter...

http://www.csgnetwork.com/presskpapsicvt.html
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Old 11-20-2008, 06:37 PM
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I have has as much as 22 PSI
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Old 11-20-2008, 06:50 PM
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Originally Posted by gcsd3742
I have has as much as 22 PSI
Is that highway? city? both?
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Old 11-20-2008, 07:05 PM
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I may be wrong but from what I have read Boost will never be consistantly the same all the time.

It is computered controled based on Weather, Temps, Alt., and other factors. Because of this it should change based on conditions.

Some days I pull some good numbers and some days it is only 12-13 pounds.
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Old 11-20-2008, 07:13 PM
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Boost

I can lay down 22 psi damn near anytime day or night... of course mine aint stock I had Flaco tune it with H/P Tuners
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Old 11-20-2008, 09:05 PM
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Originally Posted by gcsd3742
I can lay down 22 psi damn near anytime day or night... of course mine aint stock I had Flaco tune it with H/P Tuners
i lay down no psi
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Old 11-20-2008, 09:32 PM
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mine varies but I've never seen 15psi - least not yet.
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Old 11-20-2008, 10:12 PM
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Mine was a pretty consistant 15 PSI tops, but I was able to bump that up to about 17 PSI by adjusting the wastegate rod slightly. I didn't wan't to go all the way, but figured it was set pretty conservative from the factory...
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