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Go Back   Hummer Forums by Elcova > Hummer H2 Discussion Forums > Technical Discussion and Customizing your H2

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  #1  
Old 02-26-2006, 09:27 PM
rrboy rrboy is offline
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Can anyone tell me if they are happy with the this upgrade? Did you notice any changes? What sort of performance did you get? Also I have the hypertech 111 tuner, will everything work together? I read a website that had conflicting information about this.
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Old 02-26-2006, 09:27 PM
rrboy rrboy is offline
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Can anyone tell me if they are happy with the this upgrade? Did you notice any changes? What sort of performance did you get? Also I have the hypertech 111 tuner, will everything work together? I read a website that had conflicting information about this.
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  #3  
Old 02-26-2006, 10:49 PM
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Have you installed teh hypertech yet? Performance?
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Old 02-26-2006, 10:52 PM
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yes i already installed the hypertech.
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Old 02-26-2006, 10:59 PM
Rockyot Rockyot is offline
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What kind of performance gains did you get? Are you using 91 octane? Mileage?
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Old 02-26-2006, 11:03 PM
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I have felt nothing significant with the Grantelli. I suggest you save your money.

If you were racing the 1/4 mile, it may help a bit but not enough to justify the cost.

If you want power, save all the tid bits and supercharge the b*tch.
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Old 02-26-2006, 11:03 PM
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Ya but what does that do to the crappy mileage??
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Old 02-27-2006, 04:31 PM
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rubicon33- I noticed a slightly better throttle response after installing the hypertech tuner, I left the upgrade at running 87 octane. I changed the shift points so it seems like it has more pep in its steep cause of the later shifts. I also have the corsa sport exhaust and now just recently a volant cold air box. Gas milage in the city stayed the same, but for the free way I increased about 1 1/2 mpg.
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Old 02-27-2006, 04:37 PM
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by HGW:
I have felt nothing significant with the Grantelli. I suggest you save your money.

If you were racing the 1/4 mile, it may help a bit but not enough to justify the cost.

If you want power, save all the tid bits and supercharge the b*tch. </div></BLOCKQUOTE>+1

I have the Granatelli MAF and there is no difference. It might would be if you were at WOT all of the time.
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Old 02-27-2006, 08:15 PM
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by HGW:
I have felt nothing significant with the Grantelli. I suggest you save your money.

If you were racing the 1/4 mile, it may help a bit but not enough to justify the cost.

If you want power, save all the tid bits and supercharge the b*tch. </div></BLOCKQUOTE>

Other than tune testing, anyone on a 1/4 mile track with an H2 needs to be slapped and told "NO!"
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Old 02-27-2006, 08:35 PM
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I have the granatelli, hypertech, and airaid jr. kit. Seems to have more pep but realistically could just be my imagination... I think my 0-60 may have improved slightly....
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  #12  
Old 02-27-2006, 10:28 PM
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Fastest H-Town Realtor:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by HGW:
I have felt nothing significant with the Grantelli. I suggest you save your money.

If you were racing the 1/4 mile, it may help a bit but not enough to justify the cost.

If you want power, save all the tid bits and supercharge the b*tch. </div></BLOCKQUOTE>

Other than tune testing, anyone on a 1/4 mile track with an H2 needs to be slapped and told "NO!" </div></BLOCKQUOTE>Sorry, but HGW was running 13s in his lifted H2.
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