Proper Performance Engineering

[Bigshrimpin]

For me the challenge is to return to base with more fuel left than anyone else

The only thing the prop will change is the efficiency of your setup. Laser has nice thin blades, smaller diameter, and is a fast prop. I personally like the mirage plus because of the stern lifting characteristics, but folks here will run both. You've got a 20ft CC with a heavy I/O. The 20cc is light in the bow to begin with . . . without the 600+ lbs of motor/outdrive. But if you're truely after efficiency, get the Diesel, have someone blueprint the hull, have the prop labbed and be done with it.

Page 1 has the torque diagram for the cummins diesel.

http://www.cmdmarine.com/PDFs/4081824_1104.pdf

Guess I'm as much a Volvo fan as I am a Merc' denigrator!-)

Have you ever bought parts for a Volvo??