Cummins 400 ISL diesel particulate filter
I am getting a new to me 2007 Itasca Horizon DP with the 8.9 Cummins ISL 400hp engine. The EPA 2007 rules required a diesel particulate filter. Was that a requirement on 2008 model year or 2007 engine...
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I have a 2007 40' Itaska Horizon with the Cummins ISL. No DPF, EGR, DEF, etc. I assume yours is the same. Great, reliable engine, but you'll find the side mounted radiator with this year group was manufactured too small, and has trouble cooling when under significant load and when outside temp is high. Provided you manage this appropriately by keeping the RPMs high, you won't have problems.
I've driven some pretty significant passes (Eisenhower, Vail, and numerous throughout California), and can do them all in any outside air temp, but must take it slow and with engine RPM ~2500 when towing and when outside air temp is 90* or greater.
Interestingly, with the Cummins ISL, horsepower has changed slightly over the years as the emissions stuff was added, but torque has always remained the same.
I've driven some pretty significant passes (Eisenhower, Vail, and numerous throughout California), and can do them all in any outside air temp, but must take it slow and with engine RPM ~2500 when towing and when outside air temp is 90* or greater.
Interestingly, with the Cummins ISL, horsepower has changed slightly over the years as the emissions stuff was added, but torque has always remained the same.
