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Go Back   Hummer Forums by Elcova > Hummer H1 Discussion Forums > Technical Discussion and Customizing your H1

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  #1  
Old 08-28-2007, 03:01 PM
bullish bullish is offline
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Default 2004 H1 upgrades

I have an 04 H1 and would like to get get a little more power out of it. Can anyone help or send me to the right place.

Thanks
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Old 10-01-2007, 10:10 PM
bullish bullish is offline
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Default Re: 2004 H1 upgrades

anyone?
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Old 10-02-2007, 12:35 AM
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ssgharkness020147 ssgharkness020147 is offline
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Default Re: 2004 H1 upgrades

Damn. Good luck. There are a few things you can do:
Marine injectors
Mechanical wastegate (bump up your boost)
exhaust
Here is where the problem begins. You have the CAT designed computer in your 04. 04 being the only year the CAT system was in the H1 I am not aware of any computer upgrades for your truck, which will limit what you can do besides the computer. Take bumping up the boost; you can do it, but only to a point. Depending on what CAT decided was the cap off for boost, you'll start throwing boost malfunction codes on your MIL light. It can also de-fuel your engine. The only performace mod that I would really look at if I were you would be an intercooler. Its expensive, but its TOTALLY safe. From there you could stand to sqweeze a bit more boost out of the turbo with the wastegate. FWIW, doing this will not bring you anywhere close to Alpha performance (just so you know). Good luck, I'd email Travis at Rubber duck 4x4. He sells performace parts and is a hell of a good guy to work with.
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Old 10-03-2007, 10:15 PM
bullish bullish is offline
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Default Re: 2004 H1 upgrades

Thanks for the info.
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