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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 01-28-2010, 04:40 AM
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timgco timgco is offline
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Default Re: Performance Chip Adding 50hp??

Quote:
Originally Posted by splne1
IT"S A HUMMER!!!!! WTF with MPG???? I mean seriously who drives a hummer for gas mileage..........hmmmmm??????? YEAH!!!! If your looking into that go with a diesel conversion.

true!

BTW- it can be done in 4 days.
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Old 01-28-2010, 08:32 PM
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Default Re: Performance Chip Adding 50hp??

I agree that those chips are just a rip off. To make more horsepower "RELAIABLY" you need more cubic inches. The Lycoming 0-540 (that's 540 cubic inches and a 6 cylinder) produces 260 horsepower in a Piper Comanche at 2500 rpm and some have gone 2000 hours over their recommended TBO, that's the equivalent of 250,000 miles in a vehicle if you consider the fact they are always under load, just like a boat engine, very little unloaded time.
Cubic inches make horsepower and the weight and aerodynamics of what you're moving determine mpg or gallons per hour PERIOD. If you limit the cubic inches then you have to go with the heads, the compression ratio, the cam, the valves, the chip, the induction system and you seriously affect durability. I know you probably know all this, but take it from an old fart who used to race sprint cars, when you soup them up, they like to come apart. I had a chip in a Corvette and it did very little for it except make it hard to start in the winter and when it was hot.
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Old 01-28-2010, 10:11 PM
Hellz Hellz is offline
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Default Re: Performance Chip Adding 50hp??

Quote:
Originally Posted by timgco
true!

BTW- it can be done in 4 days.

wow..........

is that for a backyard mechanic too?
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  #4  
Old 01-28-2010, 10:50 PM
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Default Re: Performance Chip Adding 50hp??

First Off ..The H2 is a Rolling Aero BRICK.! Even if you add a Supercharger and gain more HP which you will you effect other things down the drive line. Tranny ...U Joints Transfer case ...Diff and so on. The H2 is a well designed rig for what it is.

My 09 has 393 HP and hooked to the 6 speed paddel shift it goes like hell. If your towning heavy loads I can see a Supercharger. Ther are new roots style charges out there that will help you tow big loads up hill with out missing a beat as well as smoke all 4 tires...but then you have to handle with care as after the fun starts the tranny clutches start to cry out for help as well as the rest of the drive line.

I would say ...Take the moon-a and dump it into other items that will improve your rigs looks or off road ability or even sweeten up the interiuor.
Forget about gas mileage... it's a Beautifull big fat boy "Like Nothing Else"
With the aero qualities of a BRICK.

But then again..I always say.. It's your rig do what you want with it...enjoy life and your Fat Boy

And I love my Brick just the way she is.
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Old 01-30-2010, 09:11 AM
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Default Re: Performance Chip Adding 50hp??

Couldn't agree more with everyone's thoughts. Leaning towards getting my rig professionally tuned. Are there any reputable tuners in the Utah area??
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