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01-22-2009, 10:11 PM
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Hummer Veteran
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Join Date: Jan 2008
Location: High in the Colorado Rockies
Posts: 210
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Re: 2 Inch Lift on H2.
Quote:
Originally Posted by DuckTruck
SummitUP,
To get the full 2-3" from the Cognito kit, does one need to purchase the green keys also or can this amount of lift be had from the full crank of the stock t-bars? Thanks for the input in advance, DUCK
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That's a good question Duck, and I would say it all depends. In my case I needed the "green keys" to get the lift I needed. The adjusting bolt on the driver's side only had a 1/4" of adjustment left before bottoming out (passenger side was at 1/2"), and turning it in all the way didn't give enough lift.
My advice to anyone wanting to do this is just go ahead and start cranking the T-bars up and see how far you can go. There's a tremendous amount of pressure on those adjusting bolts, and to avoid damaging the bolts (i.e. stripping the threads) it's highly advised to unload the front suspension first by jacking the front end high enough to get the front wheels off the ground. And don't forget the WD40!
One other thing to consider, is the torsion bar key installation tool is required to change the keys. Looks like this:

__________________
'05 H2 Lux, 37" KM2's on 17" Hutchinson Double Beadlocks, Cognito UCA's, Cognito Sway Bar Links, Custom Hydro-Assist Steering Upgrade, Eaton Front Differential Locker, 1" Rear Coil Spacers, Chevy Green Key Torsion Bar "Lift," Bilstein Shocks, Warn 9.5ti Multimount Winch, Dual Optima Yellow Top Battery's, Piaa & Hella Off-road lights, Gobi Rack, Tru-cool External Transmission Oil Cooler, Diablo Predator Hi-Octane Tune.
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01-22-2009, 10:12 PM
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Hummer Veteran
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Join Date: Jan 2008
Location: Hot Springs, Arkansas
Posts: 151
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Re: 2 Inch Lift on H2.
Thanks man.
I was thinking that I would install the Cognito kit.....then crank fully.....then determine if more is needed (aka if I can or can't fit my 40"s).
DUCK
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2003 H2, Lux & Adv Packages, Cognito 3" front suspension lift, Gobi Stealth Rack w/ Ladder, Navigation, twin Optima battery setup, AirRaid Intake, Granatelli Mass Air Flow Sensor, Flowmaster Big Block II Exhaust, Diablosport Predator Programmer,Cognito Pitman/Idler Arm Kit, Fabtech Tie Rods, Rancho RS 9000 shocks, Warn bumper and 9.5x winch, Warn light bar, PIAA's everywhere (14), everything blacked out, and rollin' on 39.5" Super Swamper IROKs on black powdercoated stock wheels.
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01-23-2009, 04:41 AM
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Hummer Expert
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Join Date: Sep 2007
Location: Mason, OH
Posts: 779
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Re: 2 Inch Lift on H2.
I hear you guys on the Cognito etc.... But if you crank it all the way the truck will have no squat at all. Am I not right?? And if I dont crank them all the way then do I really need the cognito kit?? I understand im going to need new struts no matter what.
Boss. I would imagine that if you got 38's that were 12.5 inches wide it should fit with a slight lift. Hell I got a buddy who did a 2inch custom body lift on his SUT and he is running 40's!
Also what about the rear end? Have any of you guys lifted a rear end with Air? I have not had time to put a call into Travis yet but I will soon.
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01-23-2009, 07:40 PM
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Hummer Veteran
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Join Date: Jan 2008
Location: Hot Springs, Arkansas
Posts: 151
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Re: 2 Inch Lift on H2.
HumminNBoatin'.....
All I have heard re: lifting the rear end w/ air susp. would be to "extend" the sensor arms that control the rear lift option.
I think I remember reading something about "fooling" this sensor OR being able to have the "standard ride height" of the H2 adjusted upward.
DUCK
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2003 H2, Lux & Adv Packages, Cognito 3" front suspension lift, Gobi Stealth Rack w/ Ladder, Navigation, twin Optima battery setup, AirRaid Intake, Granatelli Mass Air Flow Sensor, Flowmaster Big Block II Exhaust, Diablosport Predator Programmer,Cognito Pitman/Idler Arm Kit, Fabtech Tie Rods, Rancho RS 9000 shocks, Warn bumper and 9.5x winch, Warn light bar, PIAA's everywhere (14), everything blacked out, and rollin' on 39.5" Super Swamper IROKs on black powdercoated stock wheels.
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01-23-2009, 07:57 PM
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Hummer Authority
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Join Date: Aug 2007
Location: Hingham MA. / Durham NC.
Posts: 1,457
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Re: 2 Inch Lift on H2.
I also have the Truxxx 2.5-3 F 1.5R lift and like it very much.
Before lift.

After lift.
New wheels (old tires).

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01-23-2009, 08:16 PM
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Hummer Veteran
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Join Date: Jan 2008
Location: Hot Springs, Arkansas
Posts: 151
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Re: 2 Inch Lift on H2.
Looks good Bimmer.....all you need now is some bigger meats! Maybe 40"s?
I also agree that the "best" option for the Cognito kit would be to get the longer shocks. However, I have Rancho 9000's on all four corners (they are adjustable for those who didn't know) and I am in love with them.
Thus, this fact coupled with the reports of the Bilsteins being valved much harder and that I have adjustability as we speak......I will be opting for the extender hardware.
DUCK
__________________
2003 H2, Lux & Adv Packages, Cognito 3" front suspension lift, Gobi Stealth Rack w/ Ladder, Navigation, twin Optima battery setup, AirRaid Intake, Granatelli Mass Air Flow Sensor, Flowmaster Big Block II Exhaust, Diablosport Predator Programmer,Cognito Pitman/Idler Arm Kit, Fabtech Tie Rods, Rancho RS 9000 shocks, Warn bumper and 9.5x winch, Warn light bar, PIAA's everywhere (14), everything blacked out, and rollin' on 39.5" Super Swamper IROKs on black powdercoated stock wheels.
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01-23-2009, 11:26 PM
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Hummer Guru
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Join Date: Jan 2004
Posts: 7,060
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Re: 2 Inch Lift on H2.
I don;t know where you guys are getting 40's from....that would be retarded!! 37's on teh stock rims just fit and allow full flex. 38's with a 4" Rancho kit (more like a 6" kit) barely allow for 38's and still allow it flex up all the way.
With 38's or larger, you can forget about even turning all the way.
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