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#1
07-19-2007, 03:48 PM
Hummer Professional
Join Date: Aug 2005
Posts: 258
Re: Hypertech and tires
....but....anyone have explain to me what happen if I use stock tire and program the Hypertech with 37"....
#3
07-20-2007, 12:47 AM
Hummer Veteran
Join Date: Nov 2006
Location: Louisiana / DFW
Posts: 80
Re: Hypertech and tires
If you have a GPS, check and see if your speedo is right, even stock. Mine is and was 5 MPH fast. (which may be so the warranty will expire ~sooner~)
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2007 SUV LUX All-Terrain Blue
Polished Radix Magnacharger; 2.8" pulley; Tuned by HESCO; Custom 4L80E "Raptor" by PACT
GM 2500HD Efans on SPAL controler; K&N filter element; Dynatech Headers + Cats; Magnaflow cat-back
37" Kumho Road Venture MT KL71 on 24" ZINIK Mazotti
Pioneer AVIC-Z1 HDD navigation; 2 x 12" JL W6; Custom Box w/ Lights 
#4
07-20-2007, 10:05 AM
Hummer Authority
Join Date: Nov 2004
Location: Little Rock, Arkansas
Posts: 1,784
Re: Hypertech and tires
Good job tomp!!!
I just checked the thread and you covered all well. Stock gears just makes it real hard to get going out of the hole with stock motor etc. with bigger tires and rims. Programmers can help some but, if you are off-roading you really do not need to worry about take off.
I overcome the poor low end with more HP and torque with SC. I plan on 4.56's at later date after I get to see what topend speed runs I can come up with on an official track. The rig launchs great now but, the 4.56's will be for 1/4 mile track runs later when i go to embaress as many that I can for underestimating the mighty H2 that we all own. Also want to really go on a rice rocket eating binge real bad.
TAZ
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05 H2 SUV cus. paint, Magnuson SC 6/12lb boost, cowl hood scoop, 12" dash touchscreen, GM elec. fans, HPTuners.com tuning soft., Dynatech headers dual catback exhaust Jet Hot chrome front to back Flowmaster Super 40's, Diamo 8 Karat rims & 325X60-20" Toyo, 4 OEM Captain seats Katzkins leather, rear console computer inside running all AV/NAV etc., Infinity component system 3 amps Tsunami Caps, rear flip down 12" monitor, headrest monitors, overhead console boost, fuel pressure, & A/F ratio gauges
#5
07-20-2007, 01:50 PM
Hummer Professional
Join Date: Jul 2005
Location: New Jersey
Posts: 255
Re: Hypertech and tires
Quote:
Originally Posted by Tallowood_Air
If you have a GPS, check and see if your speedo is right, even stock. Mine is and was 5 MPH fast. (which may be so the warranty will expire ~sooner~)
Your right on with this - I was 5 mph with the stock tires - now with the 37s on on the money. I was always wondering why I was doing 80mph and not passing anyone.....lol.....
5mph helps the warranty to run out faster ----
no wonder I have 80,000 miles on my 2005 already
Tomp - thanks for all your info - it's been very helpful - I am begining to search out for the gears.
#6
07-20-2007, 02:36 PM
Hummer Authority
Join Date: Sep 2005
Location: Texas
Posts: 1,795
Re: Hypertech and tires
I recently picked up a set of brand new front & rear Yukon 4.56:1 gears for $250 for the set The expensive part is now going to be the labor and rebuild kits - not to mention the new front locker
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