More Power for the H2 [Archive] - Hummer H2 Forum: H2 forums

More Power for the H2

08-01-2005, 02:15 PM

Does anyone have any experience with 'power up' products like Jet Performance, Hypertech Power Programmer....or others and these air intake systems it is really worth it?


11-05-2009, 09:32 AM
For tuning your PCM, try Nelson Performance

The Granatelli MAF sensor dyno tests says it increases HP by 11. Before you buy it, you have to decide if you are using a stock or aftermarket airbox because they have two types of programming.

The stock air intake should not be a restriction on a relatively stock motor. The aftermarket ones are noisier, but may or may not increase power. I am dyno testing my 408 stroker in my H2 soon, and will let you know if the stock intake and MAF is good enough. If it restricts air flow I will go to a higher flowing K&N. Some cost up to 600+, and don't even suck cold air.....but they do look nice!