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10-10-2012, 01:53 AM
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Hummer Veteran
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Join Date: Mar 2009
Location: Orlando
Posts: 97
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Re: 2008 H2 on 38" Open Country MT with Rockstar
Quick question... Did you regear? What mileage drop did you see??
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10-19-2012, 09:10 AM
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Hummer Veteran
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Join Date: Jun 2010
Location: Atlanta
Posts: 211
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Re: 2008 H2 on 38" Open Country MT with Rockstar
Just got new KM2s 37 12.5 17s stock suspension, no torsion bar adjustment.
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2005 Hummer H2 LUX
Whipple SC
Ceramic coated headers
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10-20-2012, 03:45 PM
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Hummer Veteran
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Join Date: May 2009
Location: Delson, Quebec
Posts: 115
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Re: 2008 H2 on 38" Open Country MT with Rockstar
Quote:
Originally Posted by vetteSUT
Quick question... Did you regear? What mileage drop did you see??
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Not yet, still on the to do list. 2-3mpg drop from this set-up. Hoping to gain it back with the re-gear.
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2008 Hummer H2 Luxury Edition
Toyo MT 38x13.50x18 on Rockstar. Green keys. 2" rear spacers. 1" bodylift. Cognito UCA, steering bracket, front stab links. Bilstein 5100 shocks & steering stab. Moog inner/outer TR, pitman, idler arm & bracket with remote zerk. E&G Classics fender flares. ARP 434-1301 ex. man. stud kit. Airaid perf. air filter. Crown brake lines. Warn PowerPlant HD. Rubberduck UCP. Gobi Ranger roof rack. DDM Tuning 55W HID Hi/Lo headlights. Hella fogs. Evans waterless coolant.
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10-21-2012, 10:15 PM
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Hummer Expert
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Join Date: Mar 2009
Location: Burnsville, MN
Posts: 657
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Re: 2008 H2 on 38" Open Country MT with Rockstar
you should gain some MPG back... not sure if you will get the full 3 mpg though...
on 37's.. i regeared to 4.88's.
prior on 4.10 gears i was getting 8.8mpg
after the regear i get a even 10.0 maybe 10.1 soon.....
i do about 20 miles every day HW driving. maybe about another 20 miles city streets driving.
also, when i drive on the HW, im normally going about 70ish to 80ish.
when i have driven long distance on the HW ( 60+ miles) the avg MPG stays around 11mpg at 70ish mph
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2003 Black Hummer H2 Adventure Package
4.88 gears *** Cognito UCA & SwayBar Links *** Kryptonite tie rods *** K&N CAI *** 37x12.50xR20 BFG KM2 Mud Terrain's *** 20x10 Black KMC Rockstars *** EBC Slotted Rotors *** N-FAB Sidesteps *** Line-X Grill *** Recon Smoke Cab Lights ***Diablo Predator U7193
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10-22-2012, 03:15 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: 2008 H2 on 38" Open Country MT with Rockstar
Citiboy: You still getting rub at full lock? Or were you able to tweak that out? We've got a very similar setup with Cognito, keys, spacers, etc.
I'm on BFG MTs 37x12.5s now, but am think about the Toyos 38x13.5 for my next set. I'm still trying to get a feel for tread life though...I hear mixed things; some say BFG MTs last longer some say Toyos...
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CNTRY
DTOM
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10-22-2012, 03:39 PM
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Hummer Veteran
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Join Date: May 2009
Location: Delson, Quebec
Posts: 115
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Re: 2008 H2 on 38" Open Country MT with Rockstar
guru, yes, i still have rubbing issues at full lock...i installed 2" wheel spacers but it got worst...i turned the wheels 15 degrees and it would jammed at the rear fender flares so, i removed 'em and now in the classified section http://www.elcovaforums.com/forums/s...ad.php?t=42965. My next attempt is to install 2" body lift and 1" spacers.
I can't say anything about the BFG MT's because i've never used them but the Toyo MT's are awesome well compare to stock BFG's. It's noiser than stock BFG's and i definitely feel the tread when slowing down.
__________________
2008 Hummer H2 Luxury Edition
Toyo MT 38x13.50x18 on Rockstar. Green keys. 2" rear spacers. 1" bodylift. Cognito UCA, steering bracket, front stab links. Bilstein 5100 shocks & steering stab. Moog inner/outer TR, pitman, idler arm & bracket with remote zerk. E&G Classics fender flares. ARP 434-1301 ex. man. stud kit. Airaid perf. air filter. Crown brake lines. Warn PowerPlant HD. Rubberduck UCP. Gobi Ranger roof rack. DDM Tuning 55W HID Hi/Lo headlights. Hella fogs. Evans waterless coolant.
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10-22-2012, 04:33 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: 2008 H2 on 38" Open Country MT with Rockstar
Quote:
Originally Posted by citiboy
guru, yes, i still have rubbing issues at full lock...i installed 2" wheel spacers but it got worst...i turned the wheels 15 degrees and it would jammed at the rear fender flares so, i removed 'em and now in the classified section http://www.elcovaforums.com/forums/s...ad.php?t=42965. My next attempt is to install 2" body lift and 1" spacers.
I can't say anything about the BFG MT's because i've never used them but the Toyo MT's are awesome well compare to stock BFG's. It's noiser than stock BFG's and i definitely feel the tread when slowing down.
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Thanks for the info...food for thought.
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DTOM
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10-23-2012, 02:46 AM
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![[__--MUD--__]'s Avatar](image.php?u=8286&dateline=1300594796) |
Hummer Expert
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Join Date: Dec 2007
Posts: 705
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Re: 2008 H2 on 38" Open Country MT with Rockstar
Quote:
Originally Posted by citiboy
guru, yes, i still have rubbing issues at full lock...i installed 2" wheel spacers but it got worst...i turned the wheels 15 degrees and it would jammed at the rear fender flares so, i removed 'em
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My 04 was rubbing exactly like your was. I'd really like to figure out why some rigs run certain wheel/tire combos great and others don't even come close. Seems like now the majority can run the spacers no problem. I used to think it was the earlier year vehicles, but its not. I just can't believe there is that much variance in the assembly process.
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