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08-30-2010, 01:33 AM
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Hummer Professional
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Join Date: Sep 2008
Location: Utah
Posts: 293
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Re: Air Intake, Exhaust
Thanks for the input. I am figuring this might end up being the case.
__________________
Sweet looking H2 with not enough mods (2003 Pewter H2, 20" Rockstars, 40"x15.5" Toyo MT's, E&G Extended Flares, Full body tube steel exoskeleton, 5" Skyjacker lift, Amp Research steps, Gobi Roofrack and ladders, Smoked LED's, AFe CAI, Dynatech long tubes and cats, Magnaflow exhaust, Stock tune, 4.88 gears, Chrome Grenade Shifter, interior blacked out, rear captains chairs, Solar Power!!)
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08-30-2010, 05:18 AM
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Hummer Veteran
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Join Date: Jun 2010
Location: Atlanta
Posts: 211
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Re: Air Intake, Exhaust
Get a supercharge if you want to make a difference. I have a whipple charger and can't tell you enough how much my friends scratch thier heads when I hit the gas. They can't believe something that heavy could move like that.
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2005 Hummer H2 LUX
Whipple SC
Ceramic coated headers
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08-31-2010, 01:02 AM
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Hummer Veteran
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Join Date: Jan 2007
Posts: 167
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Re: Air Intake, Exhaust
Quote:
Originally Posted by scottminor
Get a supercharge if you want to make a difference. I have a whipple charger and can't tell you enough how much my friends scratch thier heads when I hit the gas. They can't believe something that heavy could move like that.
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I COMPLETELY agree. Magnacharger, Whipple is definately the way to go. I would add one but won't for a few reasons.
- Must use premium fuel. The tank is big enough with 87... not willing to pay for 92 at 10 or 11 MPG,
- The Trans, bottom, transfer case and rear are not made to last with 450 HP.
- If I wanted 500 HP, I would have bought a ZO6.
Just not for me, but I like it on yours!
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08-31-2010, 03:01 PM
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Hummer Authority
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Join Date: Jan 2008
Location: Gaithersburg, MD
Posts: 1,763
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Re: Air Intake, Exhaust
I went with a the K&N "Fuel Injection Performance Kit" (57 series) and a Flowmaster American Thunder exhaust (with ceramic Gibson shorty headers).
I did the K&N first...I noticed a bit more response from the throttle and a bit more growl from the motor...nice.
The exhaust work was done about a year later...much better sound, maybe a little better throttle response and pick-up, but I could also just be 'thinking' it's better cause the truck 'sounded' so much better.
Just like Xotik H3, I got about another .5-.7 MPG after doing both. I've averaged 11.8 over my last 10,000 miles.
These CAI and exhaust are the first two mods I do to every vehicle. They're the mods that keep on giving...power AND MPG! Let that motor BREATHE a little easier.
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CNTRY
DTOM
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09-01-2010, 12:54 AM
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Hummer Expert
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Join Date: May 2007
Location: PHOENIX AZ
Posts: 681
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Re: Air Intake, Exhaust
I sugest you get your H2 dynoed B4 the intake and exaust ,then dynoed after and when you see a 2 HP differance after spending $600.00 or more you won't be a happy camper . But you will get lots of kool sound . On a stock engine you will see almost no power gain with a cat back and intake .
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A government big enough to
give you everything you want, is
strong enough to take everything
you have.
-- Thomas Jefferson
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09-01-2010, 02:53 AM
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Hummer Professional
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Join Date: Feb 2004
Location: Annapolis, MD USA
Posts: 365
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Re: Air Intake, Exhaust
I found this on another site, it cracked me up.
Simple engineering calculations!
Each 11F air temp drop increases density by 1%, so measure the air flow temperature before and after a change to se how much you gained.
Air flow restiction can be easily measured with a manometer attached just in front of MAF. The absolute aymospheric pressure is 407 inches of water column at sealevel [29.92" HG].
Normal oem intake and air filter have ~~ 6-7" H2O of restriction as measured in front of MAF. So measure before and after. So a 4" improvement at peak rpm [4/27.7 = 0.1444 x 0.68 = ~ 1% improvement].
3 HP maximum improvement +- any temperature change improvement.
Most after market system actually increase temperature [measured at highway speed] so measuring temp is a must.
Reminds me of the old days when we used to flip the air cleaner lid over on the carb, made it sound like you had all kinds of power but actually was pulling in hotter air!
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09-01-2010, 05:44 AM
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Hummer Professional
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Join Date: Nov 2008
Posts: 261
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Re: Air Intake, Exhaust
Quote:
Originally Posted by mbdougl
Reminds me of the old days when we used to flip the air cleaner lid over on the carb, made it sound like you had all kinds of power but actually was pulling in hotter air!
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Ah yes! The good old days! Sure did sound cool!
__________________
2005 H2 SUV - Stealth Gray with Ebony interior - Third row - Exterior tire carrier -
Mirror caps - black bedliner
Roof rack rails - black bedliner
Wheels - Black bedliner on stock wheels
Gas cap lid - still chrome but will soon be black bedliner
Tail light guards - still chrome but will be black bedliner
Grill - Still chrome but will be black bedliner
Hmmmm, is there a pattern developing here?
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