Greg
Active Member
You can't idle a 480 DB in a no wake zone with both engines in gear or you'll get screamed at. Period. You have to take one engine out of gear and run at the spec 650 RPMs and you'll still be cooking at 5-6 knots. The props have a very large bite (because the engines have a butt load of torque).
http://www.cummins.rs/pocetna_stranica_files/qsm11.pdf
2,325 ft-lbs of torque? Holy crap that is a butt load. Is the idle speed 650 or 600? I thought mine was 600 but now I don't remember. Looking at some other specs:
Exhaust Gas Flow: 1709 CFM
Exhaust Temp: 1050' F
Geez, my stove exhaust fan is 1500 CFM and I thought that was a lot.