? Allison 2500 OK with 5.9L + Power Pack

[barrys]

I'm considering putting the Banks Power Pack (Ottomind with iQ) on my 2007 HR Neptune, 5.9L Cummins 325 ISB, Allison MH2500 six speed. Banks tells me the correct kit is part number 63777 which is specified for the 5.9L with Allison MH 3000. The Banks tech says as long as the transmission is six speed this is the correct kit. My concern is that HP and TORQUE ratings for the MH2500 are lower than for the MH3000 and may be exceeded with the Ottomind installed. Any experiences or other thoughts on this combination?

[DriVer]

Quote:

Originally Posted by barrys Any experiences or other thoughts on this combination?

Call Jon at Brazels RV for a second opinion. They are a Banks dealer and he can give you excellent insight about what you are looking to achieve. Just tell him you're an iRV2 member ...

[Tony2]

Barrys,

Once you find out more info can you please post here, I am curious as I am sure others are as well.

What kind of increase in HP and torque is the banks kit supposed to provide? Are there any cooling issues with upgrading the power?

Thanks,

Tony2

[barrys]

Thans DriVer. Jon has been extremely helpful through my entire process. Brazel's is a first class outfit, I was just looking for any other ideas before making the plunge. As it turns out Banks does have an Ottomind version tuned for the MH 2500 transmission. It took a few phone calls on my part to determine that, and a couple from Jon to get more details. Jon's information is that the 2500 version delivers about 20 HP and 40 FT Pounds less than the 3000 version. Still a pretty significant increase. The rest of the story is that the harness to make this Ottomind version work with the new iQ is not yet available. Coming "soon".

[Tony2]

What has been all their responses to the torque ratings of the 2500 transmission and exceeding it? That is the concern I would have.

Tony2

[Mike Canter]

I installed the Banks Power Pack System on my 12 valve B5.9 Cummins and it made a lot of difference (a lot). I make 30 lbs of boost under full load. A couple of things to warn you about. Getting that EGT to be at 1300-1330* F under full load is a real pain. You have to adjust the position of that Ottominder fuel control by moving it back or forward about the thickness of a dime at a time. The more fuel you put in the higher the EGT which is opposite from a gasoline motor. I wasted several adjustments on the fact that my new fuel filter was partially blocked due to the "Black Slime" so when I got rid of that #$#@ slim and had a new fuel filter all my adjustments were out. So make sure you have clean fuel filters first.

Here is the other warning (Warning, warning and warning again) You have to change the intake side of the turbo housing and that can be rusted on so it is not simple. DO NOT BANG OR BEAT THAT TURBO. Take it to a turbo rebuild place and have them swap the housing out. They have a special machine to do it. After I got mine together and was on a trip the cross shaft in the turbo broke. This had to be caused by me taking that turbo apart and putting it back together again and I am a crew chief and engine builder on professional race cars.

The instructions to the kit were good but they make it sound too simple. It is a long job.

Regardless of all that it was worth it. I am not sure my MPG increased because I drive it harder now because it has more power

If you have any questions you can email me direct at mike.c@mindspring.com or put them here on the board.