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Author Previous Topic: Crusader Carb Problem Topic Next Topic: Your boat requires electrical system maintenance  

CurrentSea

RO# 10265



Posted - Aug 08 2015 :  07:01:29  Show Profile  Reply with Quote
I am convinced. Ran almost 4 hours. Granted a lot was slow cruising and waiting for another boat to fuel up but my friend with 8.2s on a 37' formula burned over 100 gallons of gas where I burned less than half that and I have a bigger and heavier boat.


2009 Regal 4080
Volvo Diesel IPS

Homeport: Anchorage YC - Lindenhurst, NY

boatbum

RO# 36

Posted - Aug 08 2015 :  07:50:47  Show Profile  Reply with Quote
Nice!


Homeport: Go to Top of Page

pdecat

RO# 842



Posted - Aug 08 2015 :  08:46:26  Show Profile  Reply with Quote
Don't ya just hate it when the story turns out to be true?

Bruce



Homeport: Gulf Coast FL Go to Top of Page

Sandy

RO# 1159

Posted - Aug 08 2015 :  15:21:36  Show Profile  Reply with Quote
If you have twin IPS that would indicate just under 6.9 gph total rate, yes?
But to be able to relate (in proper jealous manner), I'm curious what was the average cruise speed, distance covered, & average NMPG? How was noise and vibration compared to previous "gas hogs"?


Sandy

Homeport: The Vineyard Go to Top of Page

mixman

RO# 25362

Posted - Aug 08 2015 :  16:20:41  Show Profile  Reply with Quote
quote:
a lot was slow cruising and waiting for another boat to fuel up


That will skew numbers greatly. What I, like you, Sandy, seem to want to know is what is fuel burn at cruising speed? What is that speed as well? I've found that 17.5 knots at 5100 RPM is best for my 30' power cat as the burn rate is under 8gph total.



Homeport: Go to Top of Page

Michael Clemensen

RO# 2006



Posted - Aug 08 2015 :  16:40:31  Show Profile  Reply with Quote
Mixman, there must be a typo 5100 RPM?.


Homeport: Winthrop Harbor, Illinois Go to Top of Page

mixman

RO# 25362

Posted - Aug 08 2015 :  20:58:25  Show Profile  Reply with Quote
Nope, twin 60hp Honda outboards. They'll run 6,000 RPM all day long and last thousands of hours. I "baby" them at 5,100 as that seems to be the sweet spot on this boat.:-)


Edited by - mixman on Aug 08 2015 22:07:26

Homeport: Go to Top of Page

KiDa

RO# 16492



Posted - Aug 08 2015 :  22:42:02  Show Profile  Reply with Quote
Apples and oranges comparison.

____________


Best Regards,

David
Saint Max
'99 330 Sundancer

==========

Capitalism is to this administration what Judaism was to the Third Reich.

-- Me

Homeport: Hopewell, VA Go to Top of Page

CurrentSea

RO# 10265



Posted - Aug 10 2015 :  08:06:04  Show Profile  Reply with Quote
I agree but I don't turn it on and off between cruise and slow.
I cruise on a good day at 29 mph and burn 24gph.
I have no vibration from ips and no prop feel since it's all computerized.
I do get vibration form the diesels.

So far this trip I have covered 122 miles and burned 117 gallons and ran for 8 hours.

The best part of the ips is the maneuverability.
At Champlins now. I tucked into the tightest spot.
Never could of done it without ips.

[[

I am standing on my bow.

The silverton wasn't there when I came in but the dock he is against was.

Plus it was blowing 20knots with gusts.
And the whole dock was watching on there bows too.



2009 Regal 4080
Volvo Diesel IPS

Edited by - CurrentSea on Aug 10 2015 08:15:16

Homeport: Anchorage YC - Lindenhurst, NY Go to Top of Page

smitty477

RO# 31913



Posted - Aug 10 2015 :  08:35:09  Show Profile  Reply with Quote
Hello Currentsea - Sorry we missed you out at Champlins it was quieter than normal last week but still was no where near empty when we were there. Joe jr being back is making a larger difference for the positive at the dock and the rest of the operations - the overall Island traffic with people and cars has actually increased from previous years. Interestingly both the boat basin and Payne's had plenty of room as well while we were there. Ended up home a bit earlier that expected (1-1/2 weeks) after some of the people and boats we were with had issues and one even ended up burning to the water line.

Your overall fuel burn is impressive for a boat of that size and weight but I am focusing on this line here as a potential concern if I have your engines guessed correctly- "I cruise on a good day at 29 mph and burn 24gph."
At 12 gph on those engines you are likely above 3,000 rpms and still above the typical prop curve exponent.
Do you have the matching rpms, boost, and pyro readings for that cruising speed as well?

Have a great time and hope this helps



Edited by - smitty477 on Aug 10 2015 08:36:50

Homeport: NY Go to Top of Page

Robski97

RO# 7334

Posted - Aug 10 2015 :  08:49:58  Show Profile  Reply with Quote
Dave,
U guys were in some snot yesterday. U have a huge advantage over a gas boat. A gas boats fuel burn in snot will be exponential when compared to a diesel boat .

Rob


2006 44 Sundancer

Homeport: Merrick, NY Go to Top of Page
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