he600wg turbo for cm870

[Rawze]

(06-28-2022 )Konstantin Wrote:  ...
Thank you! I had an impression that cm870 is not as precise control as cm871 and therefore they are inferior and can be changed to waistgate without much sacrifice, but maybe I was wrong.

You are correct on that. it is not as precise.. and a bit on the wonkly side as the turbo gets old.. but it is still superior by far vs. a mechanical turbo.

You know there has been a person or 2 in the past, who swapped out their CM870 ecm and wiring harness to a CM871 ecm + harness so that they can run the newer electronic VG. This does in fact help them quite a little bit from what I understand. I think maybe even 'running rough' did this to one of his trucks too.. so maybe u can ask him about how it turned out>? .. but I don't think he did it for fuel mileage though.


(just the beer talkin')...
- Who knows.. maybe I could break high 9's with a 400-series turbo setup like that, as I already do low 9's and high 8's regularly w 80,000lbs in the box.


If i wanted to go for all fuel mileage on an ISX and keep the power range to something reasonable.. I would have a CM871 (or cm870 w cm871 turbo and ecm) and have one of the newer 400-series turbos adapted to it. That would be the best setup someone could get for fuel mileage but the power range would only likely be about 485 HP or so... which would be fine by me, as that is all my truck is set to any ways.