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Old 01-03-2011, 07:15 AM   #21
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RE: Fuel Consumption with a 40' CHB

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markpierce wrote:The second sentence is not based on the marketing information, but rather on the principle that modern diesels generate horsepower based on the rate of fuel consumption.
Modern diesels? What else could they use to produce horsepower?

Rudolph's first engine and every steam engine before that had its efficiency, value, utility, or economy based on and measured*on the same principle ... BTUs in vs*HP or*kW*out.

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Old 01-03-2011, 10:49 AM   #22
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Fuel Consumption with a 40' CHB

I thought Nordic 32s had at first Yanmars and the rest were Cummins except special orders (Nordic was/is good for that right?) Never heard of one w a Volvo. Did they change the std engine from Cummins to Volvo? What happened to "made in America"?
OC***** I should have explained it like that "Give you the maximum HP and GPH at a given RPM." Right*** ..that's max power (WOT).
If they changed the shape of the stern all these square assed boats would would require half their power (lots and lots of them much less than even that) to cruise at 7 knots and max at 8.5 or so. That's what most of square stern boaters do isn't it? If the shape of the N32 was changed to disp 50hp would be just fine. 140hp is the least powerfull engine I;ve seen in a N32.
Rick,*** ...."Modern diesels? What else could they use to produce horsepower?" Lehman's.


-- Edited by nomadwilly on Monday 3rd of January 2011 12:00:58 PM
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Old 01-03-2011, 12:44 PM   #23
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RE: Fuel Consumption with a 40' CHB

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nomadwilly wrote:*What else could they use to produce horsepower?" Lehman's.
That was good ...*

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Old 01-03-2011, 02:35 PM   #24
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Fuel Consumption with a 40' CHB

Doh!** <table cellpadding="0" cellspacing="0" class="genmed"><tbody><tr><td width="100"></td><td width="40"></td></tr></tbody></table>

The thought was that diesels have become somewhat more fuel efficient.

-- Edited by markpierce on Monday 3rd of January 2011 03:36:35 PM
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Old 01-03-2011, 06:50 PM   #25
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RE: Fuel Consumption with a 40' CHB

Actually the new engine I bought for Willy is hardly any different that the 35 yr old Perkins that I pulled out and sold. The only modern features that I know of is thin wall casting of the block and glow plugs. And I know glow plugs were readily available when the Perkins was made. With 10 seconds of "glow" the engine starts instantly. Didn't care about the thin wall but since we were moving to Alaska I really wanted the glow plugs. The new engine had the same type of combustion chamber, the exact same bore and stroke, same style injection pump ect. And it burns a gallon an hour just like the Perky but it's quieter and smoother. I think I gained about 50 rpm after break-in. Used the same BW gear and the same prop. Interesting though that I gained 200rpm when the engine was fully broken in. (400hrs) So I can say there wasn't much new and modern about my "new" engine. When I'm out in Dixon Entrance or other big waters the "new" seems to be a very nice thing though.
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Old 01-04-2011, 05:07 PM   #26
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Fuel Consumption with a 40' CHB

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nomadwilly wrote:

Never heard of one w a Volvo. Did they change the std engine from Cummins to Volvo? What happened to "made in America"?
People we know bought a new NT34 a couple of years ago.* They were told it would have a Cummins in it but when they took delivery of the boat it had a Volvo in it.* I don't know if NT has used Volvo regularly in their boats over the years but it apparently is a standard powerplant in some of their current models.

"Made in America" went out the window the first day somebody realized that the weird littleToyotas and Datsuns didn't crap out after a year or two like American cars did.* So sometime in the early 1970s I think.

-- Edited by Marin on Tuesday 4th of January 2011 06:07:38 PM
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Old 01-04-2011, 09:39 PM   #27
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RE: Fuel Consumption with a 40' CHB

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Marin wrote:

"Made in America" went out the window the first day somebody realized that the weird littleToyotas and Datsuns didn't crap out after a year or two like American cars did.* So sometime in the early 1970s I think.

-- Edited by Marin on Tuesday 4th of January 2011 06:07:38 PM
As a body and fender repairman at a GM dealership in 1970 I had a set of metric wrenches in my rollaway.

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Old 01-04-2011, 10:23 PM   #28
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RE: Fuel Consumption with a 40' CHB

Can anyone advise about the rate of fuel consumed by a pair of 150 hp Cummins diesels? The boat is a 40' Kha Shing -- perhaps going 8 knots? Any advice would be great.
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Old 01-05-2011, 06:08 AM   #29
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RE: Fuel Consumption with a 40' CHB

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Kevinbrian wrote:

Can anyone advise about the rate of fuel consumed by a pair of 150 hp Cummins diesels? The boat is a 40' Kha Shing -- perhaps going 8 knots? Any advice would be great.
Little more information on the motors would be helpful. Are they 4BT3.9 (4 cylinder turbo), or 6B5.9 (6 cylinder natural), or something else? Other information on the boat would also be helpful such as the displacement and draft to determine the load on the motors.

LOA 40'
Beam
Draft
Displacement
Cruising speed 8 knots

Ted

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Old 01-05-2011, 08:30 AM   #30
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RE: Fuel Consumption with a 40' CHB

8K is probably above "hull speed" so it wont be as cheap as say 6K , where the fuel bill will be painless.
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Old 01-05-2011, 09:29 PM   #31
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RE: Fuel Consumption with a 40' CHB

Kevinbrian,
Guess = Seven knots is probably the speed to go and burn will prolly be about 3 gph.
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