34 Calvin Beal Cruiser

Newporter

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Nice! What are you anticipating for cruise speed/consumption numbers with that power?
 

swboatworks

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She should be topping out at 25kts and cruise at 20Kts We are hoping 16-18 gallons per hr @ 20kts. Time will tell.
 

MASTERENEGADE

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Im assuming a generator, heat/ac systems and hot water heater are in the agenda? Im just curious as to how much of the creature comforts are in store for the boat.
 

BillD

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She should be topping out at 25kts and cruise at 20Kts We are hoping 16-18 gallons per hr @ 20kts. Time will tell.

Stew,

The final speeds will be determined by the finished weight of the boat.

Here are some numbers of a similar build.

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Here are some pictures and performance #'s.

2,000 rpms: 26 mph 13.7 gph
2,200 rpms: 28 mph 16.2 gph
2,400 rpms: 30 mph 19.1 gph
WOT 2,650 rpms: 33mph 25.2 gph

At 2,600 rpms (redline) load is 93%.

These numbers are with a light boat and 6 people on board. Add about 1,000 pounds for a full tank of fuel and another 1,500 to 1,800 pounds of gear, equipment, etc. I would still expect the boat at 2,800 pounds heavier to do 29-30 mph. When the boat does get heavier, I may need to take an inch or two out of the pitch. Current prop is 26x28, 1.75:1 reduction, 500 hp QSC Cummins.
 

captcod

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the same but not really i know its 480 hp and 500 hp but also a 6.7 liter verse a 8.3 liter so not really that comparable
 

Powderpro

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Glad to see the Calvin Beal boats are being built as fast as Stewart can lay up the hulls;). That's the longest cabin I have seen on a 34 CB. I think Stewart's estimate of 25 knots is very realistic, if anyone should know, it's him.

My 34 CB with the QSC 500 was probably quite a bit lighter than this cruiser will be, but the 480hp 6.7 should be a good match for that boat. Looks like another winner from Calvin Beal boats.
 

Powderpro

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the same but not really i know its 480 hp and 500 hp but also a 6.7 liter verse a 8.3 liter so not really that comparable

The 480hp 6.7 should mimic the performance of the 500hp 8.3 pretty closely, the 6.7 will just have to be ran harder to keep up with the 8.3. At a 20 knot cruise, the 6.7 will definitely be at a higher engine load. I would personally go with the larger displacement engine, but there are other considerations like engine room space, weight, price, etc. A 400hp -500hp engine in the 34 Calvin is a good match in my opinion. You can't go wrong with a Calvin Beal.
 

BillD

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No Bill, I guess it did sound like that. I'm pretty sure that is the one I'm going with when I get around to it. I've talked to Capt Stew a couple times and came close. I have a plan............

Forget the plan, just pull the trigger :D. The Calvin is a big 36', great design and builder.

Stew's a great guy, has a ton of good hulls up there to build out.
 

Toolate

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Powderpro

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Holy crap! Thats a 34' boat that he guessed weighs 14500lbs running ridiculous speeds at 14gph. I would be happy with half of all of those numbers.

Would think that these hull might pound your teeth out in a chop at those speeds though no?

My 34 Calvin was really light at sea trial, so 26 mph (22.6 knots) at 14 gph is ridiculously good. But in all fairness, once I got the boat to a real world weight, that 22.6 knots would have been more like 15.5 gph, which is still awesome.

For comparison's sake, my 38 Wesmac at real world weight, was 22.5 knots at 17.1 gph. So the 38 Wesmac burned approximately 1.6 gph more to go the same speed. Both boats are efficient in my opinion. The 38 Wesmac did have a more efficient 28" prop versus the 26" prop on the 34 Calvin, so if I had put a 28" prop on the 34 Calvin, I likely would have picked up a little bit of efficiency. If I remember right, a 28" prop will just fit under the 34 Calvin.
 
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