MPG
Just got back from a 45 mile cruise up the gorge, most of which was at
cruising speed, 28 mph, 3200 rpm's. Used 18 gals. which translates into
2.5 miles/gal. Does that seem right for a 25' V hull with a 5.7 liter,
Alpha Drive? (I thought it would be 1.7 or so).-Greg |
Dene
Jan 23
2006
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| >3000 rpms puts me below cruising speed and I start to de-plane. You may be able to fix that to some extent by using trim tabs to bring
the stern up and the bow down. |
Wayne.B
Jan 24
|
| 3000 rpms puts me below cruising speed and I start to de-plane. That's one
thing that irritates me about a mono-hull compared to the cats I'm drooling
over. With my monohull boat, I can only go 3 speeds, slow (which feels like
a one armed swimmer), cruising speed, or faster. The cat I will have
someday should allow me to go 15 mph or 30 mph without significant
differences in the ride or handling. -Greg |
Dene
Jan 24
|
| sounds pretty good to me, especially for a boat that size |
Tim
Jan 24
|
| of course, if you backed it down to about 3000 rpm the speed wouldn't
be much different, and the savings in fuel can be a better edge even
yet. I've run my little Chris Craft with a 4 banger alpha 1 at 3000 and it
does rather well. at 3500 the fuel consumption goes up with little
speed change, and 4000 rpm the fuel really drops and doesn't gain
hardly much speed over the 3500. I suppose you might say that the percentage of speed vs. consumption
really drops out of your favor the higher rpm you go. |
Tim
Jan 24
|
| Sounds unusually good for a 5.7 on a 25 footer. I have one on a 24
and average about 2 mpg cruising at 3400. |
Wayne.B
Jan 23
|
| you guys seriously need to consider outboards and in particular etecs. |
Shortwave
Jan 24
|
| That sounds great. I only get about 4nmpg, and that's at less than 1/3
of the speed you make...(but in a slightly larger boat). |
chuckgould.chu...
Jan 23
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