Unless you've made significant modifications to the engine, the best performance (without risking the engine) will be the high octane performance tune included in the programming, no tweaking necessary
Looking for anyone who has purchased and installed a power programmer on a 2003-2006 Hummer H2.
I have a 2006 H2 and just got a Hypertech Max Energy power programmer in. Many of the settins are similar with other power programmers, like rev limit RPM's, shift points, etc. I'm hoping to find someone who already tweaked these settings and can tell me what they ended up using to get the best performance.
Clay M.
Oklahoma
Unless you've made significant modifications to the engine, the best performance (without risking the engine) will be the high octane performance tune included in the programming, no tweaking necessary
I appreciate the quick response. The power programmer is the first of many performance upgrades I'll be tackling. Next comes a free flow exhaust system. I haven't decided yet on Gibson or Borla. There's about a $500 difference in price between the two for both headers and true dual catback exhaust. I have owned both before and loved them both. Kind of like the low rumble sound of the Gibson better.
After that will be the intake. A performance throttle body, throttle body spacer, mass air flow sensor, and cold air intake (probably K&N).
I realize I won't get near as much out of the Hypertech programmer at first but there will be some kind of gain and that gain should increase as I add the other performance upgrades.
So, are you saying my best bet right now is to switch to 93 octane fuel and change the programming from Regular to Premium and not touch any of the other settings like rev limiter, speed limiter, shift points, etc.?
What performance addons would prompt me to change those other settings?
Clay M.
Yes, my recommendation is to install the 93 Octane tune and don't tweak any of the other settings at this point. That tune is dyno tested and found to be the best overall performance level for your Hummer, especially in stock or mostly stock form. If you really "need" it, you can take off the speed limiter, but that does not change the horsepower or torque of the engine, it only removes the safety feature that keeps the truck from exceeding the max speed set from the factory.
Never, ever remove rev limiters as they are there to protect the engine.
Speed limiters are there to protect you or others you may run over, but I'll trust you now how and where to drive![]()
Well, I do have 30 years of driving experience, BUT... owning a Hummer does tend to make you want to drive where vehicles may not normally be taken voluntarily! But I do try my best not run over people. Thanks again, Lloyd.
I'm trying to run myself out of gas first so I can go fill up with premium fuel before I make that change to the tuning. That won't take long with this H2.
Clay M.
Oh yeah, I just looked at a Dyno test on the Hypertech website for a Hummer H2 with stock settings except for the Premium tuning and it showed a 24hp and 20 ft/lb torque increase. That's impressive.
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