questions about a Cummins ISM turbo

[Bearmtnmartin]

(12-22-2023 )windowrattler Wrote:  According to Cummins lookup it's an ISM-Cm570 at 425 HP. The turbo should be part number 3800856 which uses an air controlled actuator. It could be possible that Freightliner/motorhome company had them modified from what Cummins built?

The motor is from a semi truck. I bought the whole truck and dismantled it and swapped the drivetrain in. But you are confirming the turbo may be incorrect. When I google your part number it comes up with the same turbo but with a wastegate. But then I dont get enough boost to dump boost anyway.