400hp 9.2ISL Cummins or 400hp C9 Cat
Pros and Cons please and do realize that some of this stuff is like arguing Ford vs Chevy. Thing is, I'm not even in the ball park when it comes to Diesel power.
Forum Discussion
DSDP Don wrote:
It's hard to quantify, but I agree with "sprintmod1" on the two engines. My sister had a 34' DP with the 350 Cat. I had a 36' DP with the 400 ISL. Their coach was quicker, but I soon pulled away from them. When we would fuel up, I always look a less, (about 1/2+ mpg better) even though I had a larger coach and engine.
I know many of the older 525HP Cats, drank a lot of fuel. I don't think you can go wrong with either engine, but my vote would lean toward the Cummins.
That 350 Cat was based on the old 3126 - but at 7.2L it's not a small block but certainly not a big block either. It was also only rated at 860 # TQ.
The 400 ISL is rated at 400/1200, and is 8.9L large.
I'm guessing - only guessing, theirs was geared a bit lower.
Our last MH had the 7.2 Cat, or current MH has the ISL. The difference is night & day. There is no replacement for displacement. :B
