Boatmad.com


Reply
 
Thread Tools Display Modes
 
Old 21-05-2006, 05:09 PM   #1
numbskull
 
Jon Fuller's Avatar
 
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast

Join Date: Mar 2004
Location: South
Posts: 15,959
interesting fuel consumption figures..

..from a guy on Speedwake.

remember tho' that these are US galls, ie about 4 litres, as apposed to 4.54 litres for a real gallon.


496HO fuel consumption.
For the owners of 496HO's. Ever wonder how much fuel your motor burns? Now that gas is so expensive, I'm trying to find that "sweet" spot. Using Diacom software this was my findings from today.

RPM GPH
700 1.61
750 2.0
850 2.17
1070 4.26
1525 5.67
2000 8.55
2100 9.22
2200 9.57
2400 10.43
2800 10.55
3000 11.67
3300 14.5
3500 16.49
3800 19.51
3900 19.73
4000 21.17
4100 22.98
4500 29.26
4600 30.1
4700 32.21
4800 33.32
4900 33.64
4950 34


To get it in perspective, the 34 US GPH max stated here, equates to 29.56 Imperial GPH, or roughly £150/Hour at marina prices

Still way better than our race 502 Magnum MPI, which used 44 imperial GPH flat out! what a greedy fkkr!

Looks as though cruising at around 4k gives a consumption of about 17.5 Imperial GPH, or £85/Hour....could be worse I spose
__________________

__________________
.

"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
Jon Fuller is offline   Reply With Quote
Old 21-05-2006, 06:21 PM   #2
Registered User
 
Country: uk
Location: dorset
Interests: wasting money on boats
Boat name: aquilla .
Boat make: windy typhoon 43 , extreme24 , fourwinns 220
Engines: tamd 75p, 496 ho, 5.0gxi
Cruising area: corfu

Join Date: Mar 2004
Location: dorset
Posts: 556
luckey old andy with that pro charger on top mind you
cruising at 3300 not so bad wonder what sort of speed that would give
__________________

Rockey is offline   Reply With Quote
Old 22-05-2006, 08:58 AM   #3
Registered User
 
Carl's Avatar
 
Location: hayling island
Boat name: snow monkey
Boat make: extreme 24
Engines: mercruiser 6.2

Join Date: May 2004
Location: hayling island
Posts: 2,072
www.boattest.com. lots of tests and fuel consumption figures
Carl is offline   Reply With Quote
Old 22-05-2006, 10:53 AM   #4
Registered User
 
Country: Denmark
Boat make: Cobalt 263
Engines: Merc HP500EFI

Join Date: Feb 2005
Posts: 467
350 mag VS 6.2MX

the 350 is much more efficient..!!

__________________
Lars
"you can't live in the past nor future, only the present - so enjoy the ride"
Lars T is offline   Reply With Quote
Old 22-05-2006, 07:17 PM   #5
Registered User
 
Country: UK
Location: CHESHIRE
Boat name: La Traviata
Boat make: Cobalt 263
Engines: Merc Mag 496 HO
Cruising area: NORTH WALES

Join Date: May 2006
Location: CHESHIRE
Posts: 5
Jon

I have a 2005 Mag 496 HO in a Cobalt 263 with a Bravo 3x drive using a 26" prop set.

The boat is equipped with Mercury's Smartcraft system and records an efficient cruise around 2800 rpm at 8 gallons ( US ) per hour around 33 knts GPS, and flat out 5000 rpm 38gph around 55knts.

Does the Diacom equipment give you water pressure readings?, I thought I had a problem earlier this season as the reading was 1.5psi at idle, the Merc technicians told me it should be 3.3, I had the boat lifted, changed the impellor that looked brand new replaced it and still have the same reading, what's yours?
James TT is offline   Reply With Quote
Old 07-02-2011, 12:45 PM   #6
Senior Member
 
Pennpromo's Avatar
 
Country: UK
Location: Christchurch, Dorset
Occupation: Marine Engineer-ish
Interests: Boats, Cars.
Boat name: Splash 4
Boat make: Hunton
Engines: Mercruiser 640
Cruising area: Poole, Solent

Join Date: Feb 2005
Location: Christchurch, Dorset
Posts: 572
Quote:
Originally Posted by Jon Fuller View Post
..from a guy on Speedwake.

remember tho' that these are US galls, ie about 4 litres, as apposed to 4.54 litres for a real gallon.


496HO fuel consumption.
For the owners of 496HO's. Ever wonder how much fuel your motor burns? Now that gas is so expensive, I'm trying to find that "sweet" spot. Using Diacom software this was my findings from today.

RPM GPH
700 1.61
750 2.0
850 2.17
1070 4.26
1525 5.67
2000 8.55
2100 9.22
2200 9.57
2400 10.43
2800 10.55
3000 11.67
3300 14.5
3500 16.49
3800 19.51
3900 19.73
4000 21.17
4100 22.98
4500 29.26
4600 30.1
4700 32.21
4800 33.32
4900 33.64
4950 34


To get it in perspective, the 34 US GPH max stated here, equates to 29.56 Imperial GPH, or roughly £150/Hour at marina prices

Still way better than our race 502 Magnum MPI, which used 44 imperial GPH flat out! what a greedy fkkr!

Looks as though cruising at around 4k gives a consumption of about 17.5 Imperial GPH, or £85/Hour....could be worse I spose
Jon, just what we were talking about on Saturday
Pennpromo is offline   Reply With Quote
Old 07-02-2011, 01:20 PM   #7
Registered User
 
pain -tera 28's Avatar
 

Join Date: Nov 2010
Posts: 176
Unhappy

Quote:
Originally Posted by Pennpromo View Post
Jon, just what we were talking about on Saturday
I never realy wanted to know (head in sand )now i feel ill X2 even worse since James aka Larby told me on sat 54pence a litre where he lives
pain -tera 28 is offline   Reply With Quote
Old 07-02-2011, 07:10 PM   #8
Registered User
 
Ciao's Avatar
 
Country: England
Location: Great Horwood

Join Date: Mar 2005
Location: Great Horwood
Posts: 2,372
Send a message via Skype™ to Ciao
Fuel !

Reading this post is scary -

The Cowes 100 start boat (Buzzi RIB with twin Merc outboards) was burning £8.00 a minute in petrol!
Ciao is offline   Reply With Quote
Old 07-02-2011, 09:59 PM   #9
Registered User
 
Ringmaster's Avatar
 
Country: England
Occupation: I have 1!
Boat name: vodka express/smoking aces
Boat make: liberator 221/extreme 24
Engines: 7.4 v8 8.2 v8
Cruising area: Portsmouth

Join Date: Jul 2009
Posts: 455
This was unnecessary to start this thread mr Fuller! We are all going to be looking for stick and rag boats soon!


Does show how bad on fuel boats are, still, atleast we are all doing are bit for the ozone. Hopefully we can help in getting a decent summer by running bigger and thirstier engines!
__________________
www.carsoffareham.co.uk
Ringmaster is offline   Reply With Quote
Old 07-02-2011, 10:09 PM   #10
Registered User
 
Ciao's Avatar
 
Country: England
Location: Great Horwood

Join Date: Mar 2005
Location: Great Horwood
Posts: 2,372
Send a message via Skype™ to Ciao
Quote:
Originally Posted by pain -tera 28 View Post
I never realy wanted to know (head in sand )now i feel ill X2 even worse since James aka Larby told me on sat 54pence a litre where he lives
Forecourt price (unleaded) is £1.14 in Guernsey - My mate saw this post, just filled his tank & rang me.
Ciao is offline   Reply With Quote
Old 07-02-2011, 10:10 PM   #11
Registered User
 
Country: UK
Location: Thorpe
Occupation: Mechanic
Boat name: spend it
Boat make: sr9 pascoe
Engines: 496 mag ho
Cruising area: Poole n solent

Join Date: Jun 2004
Location: Thorpe
Posts: 139
fuel costs

basically chaps if u want it have it. dont have it and moan about it mind u some diesel boats are fantastic on fuel maelstrom hope i spelt it rite wood go from merlins by the itchin bridge to poole and back for £13 but diesel was 25 p a ltr then that was at 35/40 mph or round the island for £ 20
Andy Edwards is offline   Reply With Quote
Old 07-02-2011, 10:23 PM   #12
Registered User
 
Paul E's Avatar
 
Country: Guernsey
Occupation: Postie
Interests: Heavy Heavy Metal
Boat name: Slayer II, Slayer, Pen15
Boat make: Phantom 19G-R, Bernico F2 Extreme, Ring 15
Engines: Evinrude 115HO, Yam 90
Cruising area: Channel Islands

Join Date: Aug 2009
Posts: 1,457
Quote:
Originally Posted by Ciao View Post
Forecourt price (unleaded) is £1.14 in Guernsey - My mate saw this post, just filled his tank & rang me.
£1.05 if you go to the right place!

I'm not sure what marine fuel is at the moment, I'm guessing around 75?

It would be nice to know what speeds are being done at those specific rpms, to see what the most efficient cruising rpm and speed would be for a given distance
Paul E is offline   Reply With Quote
Old 07-02-2011, 10:32 PM   #13
Registered User
 
Coronet Kip's Avatar
 
Country: Guernsey
Occupation: Engineer
Interests: Restoration
Cruising area: Channel Islands & northern French coast

Join Date: Jan 2009
Posts: 154
Just checked with the boatworks+ site and we're paying 88p per litre for marine fuel right now

http://www.digimap.gg/boatworks_fuelling_times

I'm expecting to burn 40 GPH + with my SBC...ah but I enjoy it

Keep smilin

Chris
Coronet Kip is offline   Reply With Quote
Old 07-02-2011, 11:00 PM   #14
Registered User
 
Ciao's Avatar
 
Country: England
Location: Great Horwood

Join Date: Mar 2005
Location: Great Horwood
Posts: 2,372
Send a message via Skype™ to Ciao
Do Boatworks+ still do the same mix?

60% Sea Water 40% fuel.
Ciao is offline   Reply With Quote
Old 08-02-2011, 06:14 AM   #15
Registered User
 
gerry.p's Avatar
 
Country: Channel Islands
Location: Guernsey
Occupation: engineer
Interests: Boats
Boat name: Miss Speedbird (ex Tolstar)
Boat make: Tolcraft 21
Engines: volvo penta 260hp
Cruising area: Channel Islands

Join Date: Aug 2006
Location: Guernsey
Posts: 55
WHAT !
with the price of sea water more like 50-50 now
gerry.p is offline   Reply With Quote
Old 08-02-2011, 06:30 AM   #16
living the dream
 
DAREDEVIL's Avatar
 
Country: Fl. USA
Location: Where the sun never dies
Occupation: Life Artist
Interests: BOAT RACING
Boat name: i call her baby
Boat make: Aero-tek
Engines: a lot of horses
Cruising area: WW

Join Date: Apr 2010
Location: Where the sun never dies
Posts: 453
AT 4950 = 34 GPH !!!

I wonder at which speed your running tho..i mean at 4950 RPM..so if its at 80+ MPH..its actually not bad.

My BBC is using 0.8 GPM...and i think its absolutley good...others i had and seen use a lot more, like 1.2-1.5 GPM with less power.

Oh, John...BTW... a USGallon is 3.78 liters!
__________________
Not as bad as you think i am, just different !
DAREDEVIL is offline   Reply With Quote
Old 08-02-2011, 06:47 AM   #17
Registered User
 
larby's Avatar
 
Country: Guernsey
Occupation: Engineering
Boat make: None, boo!
Engines: Turbines mainly!
Cruising area: The inside of my workshop!

Join Date: Mar 2008
Posts: 2,644
Quote:
Originally Posted by pain -tera 28 View Post
I never realy wanted to know (head in sand )now i feel ill X2 even worse since James aka Larby told me on sat 54pence a litre where he lives
That was for Diesel direct from the tanker mate, 80 odd was petrol, seems it's 88 at the moment.

Don't know where someone found 1.14 a litre, but they got ripped off big time!

It's still pretty scary when you see the prices in the UK, couldn't believe it the other day!!

James
__________________
facebook.com/jlinnovationgsy

Facebook.com/turbinebike

The true test of a man is how he treats someone of absolutely no use to him.
larby is offline   Reply With Quote
Old 08-02-2011, 08:30 AM   #18
BananaShark Member
 
Cookee's Avatar
 
Country: UK
Location: Salcombe South Devon
Occupation: Racer and builder
Interests: Winning races
Boat name: BananaShark
Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's

Join Date: Mar 2004
Location: Salcombe South Devon
Posts: 4,632
The Yanmar 6BY's we're fitting in the new boat use 52 litres per hour each - Wide open throttle at 4000rpm - 108 litres per hour at 70mph (estimated top speed if we get it) equals 1.54 litres per mile. The engine is a derivative of the current 3 litre BMW engine.
__________________
Cookee



British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)

www.bananasharkracing.com
Cookee is offline   Reply With Quote
Old 08-02-2011, 08:44 AM   #19
Senior Member
 
Pennpromo's Avatar
 
Country: UK
Location: Christchurch, Dorset
Occupation: Marine Engineer-ish
Interests: Boats, Cars.
Boat name: Splash 4
Boat make: Hunton
Engines: Mercruiser 640
Cruising area: Poole, Solent

Join Date: Feb 2005
Location: Christchurch, Dorset
Posts: 572
Consumption

Quote:
Originally Posted by Cookee View Post
The Yanmar 6BY's we're fitting in the new boat use 52 litres per hour each - Wide open throttle at 4000rpm - 108 litres per hour at 70mph (estimated top speed if we get it) equals 1.54 litres per mile. The engine is a derivative of the current 3 litre BMW engine.
Cookee is it your maths or mine, surely 2 X 52 = 104 !!!
Still good value I would say compared to petrol. At the end of the day its all about shifting weight efficiently. The lighter the boat the less fuel you use. The faster you go the more in-efficient you tend to be- although Adam will argue that!
Pennpromo is offline   Reply With Quote
Old 08-02-2011, 08:52 AM   #20
BananaShark Member
 
Cookee's Avatar
 
Country: UK
Location: Salcombe South Devon
Occupation: Racer and builder
Interests: Winning races
Boat name: BananaShark
Boat make: BananaShark 34' Race
Engines: Twin Yanmar BY 260's

Join Date: Mar 2004
Location: Salcombe South Devon
Posts: 4,632
Quote:
Originally Posted by Pennpromo View Post
Cookee is it your maths or mine, surely 2 X 52 = 104 !!!
Ooooops!
__________________

__________________
Cookee



British Champions! RIB Formula 1 2005
National Speed Record Holder at 90.15 (still)

www.bananasharkracing.com
Cookee is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Powered by vBadvanced CMPS v3.2.3

All times are GMT +1. The time now is 07:28 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
×