h2 feeling a bit sluggish when towing, what are my options to increase torque?

[kalantar]

I am coming upon 9 years of ownership of my H2 and with almost 90k miles on it, it has been rock solid. But lately after towing my toy hauler around it seems the H2 is getting a bit sluggish (only when towing). Any thoughts on what it could be? I haven't had the 100k service, which I plan on doing soon and there are no error codes.

I am also limited on where I can tow my toy hauler, steep grades are out of the question. This forces me not to travel as often as I like or to places I would like to go with H2. Ofcourse buying a diesel truck is an option but I really do not want to buy another vehicle. Any thoughts on increasing the torque/power? I was considering doing the diesel upgrade but I didn't want to drop that much coin and the reliability factor is huge for me.

Is the turbo option a good long term/reliable option? Any other options out there?

Any input would be appreciated.

[HummerMann]

I've looked at supercharging mine several times. Mark can tell you a lot of the costs and performance differences in supercharging vs diesel. I've also read on the brand X board that the Z06 LS7 505 hp engine is a straight forward bolt in on the H2 except for the electrical harness and need for a custom oil pan. The dealers are quoting 15k for the LS7 crate engine, but I've seen them on EBay for 12k. My next concern would be if the transmission could handle that extra hp and torque. For less than half that though you can put on a supercharger.

[[__--MUD--__]]

Multiply the existing power you have by putting in some decent gears. If you multiply the engine power better have room in your budget for a real transmission (4l80).

[kalantar]

I have 37's with 4:56 gears on it. The gearing has helped but at times I need that extra push to go up the steep grades. A new engine @ 12k plus is more than I would like to spend now, that is good gas truck money there. I was hoping something around a few thousand dollars.

It seems the turbos aren't a good long term solution as well, what about other engine mods? Headers, bigger pistons, anything?

[tomp]

Dynatech long tube headers & high flow cats, volant intake, diablo predator programmer! If towing regularly with 37s, you really need 4.88 gearing, imho

I'd also strongly consider electric fan conversion

[[__--MUD--__]]

I had 4.56 and I thought it was a turd....I'm at 5.13 now.

[kalantar]

Originally Posted by tomp

Dynatech long tube headers & high flow cats, volant intake, diablo predator programmer! If towing regularly with 37s, you really need 4.88 gearing, imho

I'd also strongly consider electric fan conversion

How much power increase will the header, cats , intake and programmer make? How much would it cost?
I tow 2x a year about 200 miles each way currently, the most I would tow would be 6 or 7 times a year if my h2 could pull it up the steep grades.

What is an electric fan conversion?