Performance; I'm confused

[MrZerto]

Performance; I'm confused
I'm VERY interested in the 31 TE's. I'm seeing owners posting 17-18 kt cruise w/ a single 450hp Cummins.
Its seems to me that number should be north of there if you run 10% off the top. Feed back please.
new to this board
thx
Jim

[Pitou]

As a general statement most will cruise 20 - 25% off of WOT for a "comfortable fuel efficient cruise". Though I am a 28TE owner with a 370 Cummins, at WOT my engine drinks 20 gph, at 10% off WOT she burns 15.8 gph and at 20% off and a comfortable cruise of 22 knots she burns 10gph and at what is still a reasonable sweet spot for the cruise at 25% off WOT she pushes 18 knots at 8 gph. Depending upon the sea state and time to arrival I find myself "cruising comfortably" at 18 to no more than 22 knots. I'd rather burn 8 - 10 gph than 15.8 to 20 gph and enjoy a longer cruising range. I believe the principal the same which ever boat you run ... it is usually about fuel burn & comfort. What do you run for a boat now or in the past.

[MrZerto]

Thanks for the info. I ran a Duffy 35' w/ 370 6BTA Cummins. Understanding the different hull designs I figured these hulls would get much more cruising speed. It was a 16-18 knt cruise depending on current ect. My problem was the Duffy slept 4 not 5 comfortably. I really like the 35 TE's. The 31 TE's work too.
Jim

[Tuxedo]

I took these pictures when I was selling my 31 with single 450C Cummins. They should answer your question.

I think the skeg impedes theorecial performance, but most here will tell you the benefits far outweigh the performance lost.

[MrZerto]

Tuxedo,
Thanks that helps. Is that 450 rated at 2850 RPMs. I'm lean toward a single too. Economy, weight and access considerations. Anyone have 35TE data w/ single power?
Thanks
Jim

[Tuxedo]

Tuxedo,
Thanks that helps. Is that 450 rated at 2850 RPMs. I'm lean toward a single too. Economy, weight and access considerations. Anyone have 35TE data w/ single power?
Thanks
Jim

The 450 is rated at 2600 RPM. I had it propped so it would turn 2700 at WOT. You can run it all day at 2400, burning about 17-18 GPH.