The easy answer is: sell your I5, buy a H3 Alpha, then with all the money you saved, mod the LH8.

When you say "I have did all I could to increase the performance for my H3 3.7" what was that?

 

Look in to turbocharging, could be cheaper than supercharging.

 

what do you plan on doing with it when youve increased the performance? everyone should determine the purpose of their car/truck before buying it (unless money is no object). the Hummer's main purpose is to be used for off-road, hence the lower gearing. that other pic posted looked like the guy was racing it, which whatever, but so far I have not heard of any complaints from anyone with the I5 on the trails. we Americans always want more power,dont we? id either trade it in for the V8 Adventure package like Doc mentioned or simply improve other non-powerplant off-road capabilities.

 

Sounds good with the alpha V8 in and mod on that engine.
Is there a thread on a V8 swap ?

 

The dude is in Singapore, not sure if he can get an Alpha even if he wanted one.

Best bet is go to a local tuner shop and ask about performance mods for the 3.7L Vortec or 3.7L Issuzu. They may have to modify the mounting brackets and do a custom tune.

 

Got to love that IFS wheel travel, 3 wheeling even on flat ground.

 

Hi solidJJ.
Was the pic of the yellow Hummer supercharge or engine transplant ?
Or maybe both.

Hi guys. In Singapore the law is very strict, any mod. To the engine is illegal.
I have a workshop my self, so I don't think I will have much problem doing either the supercharger (which I prefer) or the engine transplant.
The problem is in SG, there is no supercharger kit available unless I custom myself.
Be honest, I rather get a custom kit and the installation will look neater too.
Getting a 5.3L is no problem. But I just want to make sure is worth the trouble and I make sure I do all my study before proceeding.
I try contacting CAPA in Australia but the supercharger kit for H3 no more in production.

Can 1 has any contact for getting a FULL supercharger kit ?
Thank you all.

 

I had a guy measure and mock up a blower kit for my H3 but he hasnt finished the kit to my knowledge.

Id suggest a remote mount turbo kit for these vehicles. The new air cooled/ball bearing/billet wheel turbos would work great and not require an oil supply to them. Precision Turbo's 58mm billet would work good I think.