Rear mount turbo

[[__--MUD--__]]

I dont have a problem w/ the "3 ton square"

I would just like a logical reason from who ever was the ******* that decided to put a passenger car tranny in the "3 ton square".

GM has always had a lot of unspoken rules....No car shall ever exceed the power/speed of the corvette. Someone got fired in pontiac in 89 for that...underrating the 3.8L turbo trans am. Smoked the vette...hell it smoked the vett up untill 92 or 93.

The H2 would of been unstoppable if they put the 4l80 series in it. I think it was intentionally done.

Its like throwing a turbo in a camaro, now double the weight of the car, and add a couple thousand pound trailer to it. How long do you think that tranny would last?

[hookandpull]

I do all of my own work on every single vehicle I own... If that tranny ****s out then so be it. Ill put an 80 in the pig. But positive displacement superchargers have a completely different power curve then a rear mount turbo. The turbo will have a more gradual hp increase where as a positive displacement blower is instant impact. It's the sudden jolt of HP that is most detrimental to trannys and everything else follows suit.

Did you guys know the "roots" style blowers that are so popular on the H2's are actually the same stock blower on 03-04 Cobras? The Eaton M112 is what comes on the Terminators from Ford and the Magnum Powers is basically a glorified M112. The Whipples and Kenne Bell's are the same line that the Cobra's run as well. I know ALL of these blowers well and I know how hard they are on a drivetrain. They hit like a 9lb hammer and boost is almost instant. I know this cause I have a built 03 Cobra with a Whipple running 20lbs of boost making 650rwhp. That being said even the "bulletproof" T-56 gets worn out from PD blowers over time.

And I dont think a 33% increase in highway fuel mileage with a CAI, Rear Mount Turbo and custom tune is ridiculous.

[guruerror]

Originally Posted by [__--MUD--__]

I dont have a problem w/ the "3 ton square"

I would just like a logical reason from who ever was the ******* that decided to put a passenger car tranny in the "3 ton square".

GM has always had a lot of unspoken rules....No car shall ever exceed the power/speed of the corvette. Someone got fired in pontiac in 89 for that...underrating the 3.8L turbo trans am. Smoked the vette...hell it smoked the vett up untill 92 or 93.

The H2 would of been unstoppable if they put the 4l80 series in it. I think it was intentionally done.

Its like throwing a turbo in a camaro, now double the weight of the car, and add a couple thousand pound trailer to it. How long do you think that tranny would last?

MUD, can you post up some info/link about a 4l65 to 4l80 upgrade for an H2. I did a quick search on the forum and Google and came up with some, but not much.

You seem like you've got some knowledge...please share.

[hookandpull]

I believe mechanically they bolt up the same but you need to run a different computer for the 80 vs the 60. That would be my only assumption granted I am not GM literate but I have done my fare share of swaps in other vehicles. **** you may even be able to flash the computer for the 80 instead of swapping. assuming that the tranny's in H2's have independent controllers for the transmissions.

[[__--MUD--__]]

Originally Posted by guruerror

MUD, can you post up some info/link about a 4l65 to 4l80 upgrade for an H2. I did a quick search on the forum and Google and came up with some, but not much.

You seem like you've got some knowledge...please share.

These guys have everything needed, even the cross member.

http://www.transmissioncenter.net/4l60e.htm#4L60E to 4L80E

You can use your origional computer w/ a custom tune to run the 4l80.

I dont remember any detailed posts on any of the hummer forums, but if you check out performancetrucks.net or ls1tech- They have tons of info there.

[hookandpull]

Thanks