Mercury 1350 fuel consumption ?
11-27-2011 | 02:04 PM
#21
Registered
Joined: Nov 2003
Posts: 9,950
Likes: 0
From: 1 Flu Ovr KuKos Nest-WI
Fuel capacity seems to be the question for long haul runs.
11-27-2011 | 02:17 PM
#22
Registered
Joined: Mar 2008
Posts: 1,181
Likes: 2
From: Vancouver BC
Stating BSFC numbers for WOT is probably not what this gentleman is looking for. Also, the BSFC for a twin turbo marine engine running on 91 octane will be different then most of the examples given. I think what Adam was looking for is cruise numbers and maybe 75-90% throttle numbers, and I believe he was asking for numbers from any members with real world experience that actually own a boat, or have run one with 1350's.. Mercury won't tell you much and real world experience trumps posted figures any day. One would think this forum would be the best possible place to get information on such an exclusive engine. Adam, you might want to try posting your question in the general discussion section. Sounds like a really cool project.
11-27-2011 | 02:25 PM
#23
Registered
Joined: Feb 2005
Posts: 4,400
Likes: 25
From: Michigan
Would be interested to know your background Stevesxm as I'm sorry but I don't know you.
Your messages seem to be more points scoring exercises and actually don't really add up.
I mean "the brits would send "engineers" over to work on the race cars. it was a rare occassion when one could justify a conclusion with any genuine calculation or engineering basis. the feeling for the most part was that british airways was giving away engineering degrees on the flights over along with little plastic wing sets to the kids." ........
The internet can be a great place and a way of sharing information but there can be so much negativity...
Your messages seem to be more points scoring exercises and actually don't really add up.
I mean "the brits would send "engineers" over to work on the race cars. it was a rare occassion when one could justify a conclusion with any genuine calculation or engineering basis. the feeling for the most part was that british airways was giving away engineering degrees on the flights over along with little plastic wing sets to the kids." ........
The internet can be a great place and a way of sharing information but there can be so much negativity...
11-27-2011 | 02:27 PM
#24
Registered
Joined: Feb 2005
Posts: 4,400
Likes: 25
From: Michigan
Stating BSFC numbers for WOT is probably not what this gentleman is looking for. Also, the BSFC for a twin turbo marine engine running on 91 octane will be different then most of the examples given. I think what Adam was looking for is cruise numbers and maybe 75-90% throttle numbers, and I believe he was asking for numbers from any members with real world experience that actually own a boat, or have run one with 1350's.. Mercury won't tell you much and real world experience trumps posted figures any day. One would think this forum would be the best possible place to get information on such an exclusive engine. Adam, you might want to try posting your question in the general discussion section. Sounds like a really cool project.
11-28-2011 | 05:09 PM
#25
Platinum Member
Joined: Sep 2001
Posts: 5,769
Likes: 151
From: tn
Guys, the BSFC number for a good running well matched motor won't vary as much as some of you guys are claiming. The 0.5 lb/hp "rule of thumb" will be on the conservative side for these motors due to their efficient combustion chambers, their closed-loop ECU, and the lack of mechanical supercharging. As far as different engine speeds, unless the motor is very much over cammed (which it isn't), then low-to-mid cruise BSFC will basically mirror the high-cruise BSFC, and in the case of these motors, it won't climb a whole lot over that at WOT.
Keep in mind, though, that BSFC is based on HP "being produced" at that instant in time - which obviously varies according to throttle position/rpm/etc. If he is designing the boat, then he has the charts to approximate the hp needs of the hull at a given speed, so he can extrapolate the fuel requirements accordingly.
"Real numbers" would be great, but Merc doesn't want to release them. That means that somebody would have to submit some dyno charts from a customer motor, and unless these are floating around - well, you get the idea.
And why are people bashing on others? Questions, answers, playful banter - that's what this is for.
MC
Keep in mind, though, that BSFC is based on HP "being produced" at that instant in time - which obviously varies according to throttle position/rpm/etc. If he is designing the boat, then he has the charts to approximate the hp needs of the hull at a given speed, so he can extrapolate the fuel requirements accordingly.
"Real numbers" would be great, but Merc doesn't want to release them. That means that somebody would have to submit some dyno charts from a customer motor, and unless these are floating around - well, you get the idea.
And why are people bashing on others? Questions, answers, playful banter - that's what this is for.
MC
11-28-2011 | 06:22 PM
#26
Registered
Joined: Sep 2003
Posts: 1,867
Likes: 14
From: Here and There
In the May/ June 2011 Powerboat Mag (page 52) they tested a M 31 DCB with a dry weight of 9200 lbs and they said the motors "inhaled fuel".
At 100mph it was getting 1mph but at WOT it burned 145 gallons per hour per motor (probably wishing the 176 gallon fuel tank was a bit bigger on the test boat LOL..).
No such thing as a dumb question if you are legitamately asking it (some ask questions for the sake of watching themselves type which can get annoying. You were obviously genuine so no reason for people to be bashing).
Please tell us more about your project and post some pics if you get a chance.
At 100mph it was getting 1mph but at WOT it burned 145 gallons per hour per motor (probably wishing the 176 gallon fuel tank was a bit bigger on the test boat LOL..).
No such thing as a dumb question if you are legitamately asking it (some ask questions for the sake of watching themselves type which can get annoying. You were obviously genuine so no reason for people to be bashing).
Please tell us more about your project and post some pics if you get a chance.
Last edited by baywatch; 11-28-2011 at 06:30 PM.
11-28-2011 | 07:31 PM
#27
Registered
Joined: Mar 2008
Posts: 1,181
Likes: 2
From: Vancouver BC
That is a number I would believe with Merc's conservative tuning and making 1350 on pump gas. Who knows what they've got the cruise AFR's tuned for which will effect the bsfc, also depends on load vs rpm, rpm of peak torque, etc. Not as simple as guessing at numbers. If it was an NA bbc It'd be a lot easier answer.
11-28-2011 | 10:22 PM
#29
Registered
Joined: Oct 2004
Posts: 616
Likes: 1
From: Portland, OR
As others have alluded to, even if you happen to be made of money, you still have range issues for longer poker runs, people with ambitions for endurance runs, etc. Also, fuel with adequate octane is not always available where you want to go, so being able to plan your trip is worth something to some.
From personal experience, as well as reading the tone of most of the boat owners on this site, I don't think there is one of us that enjoys the part where you pull up to the pump and pour four digits worth of fuel in. Especially when you know just 10 or 15 years ago, the same load could be had for 1/4 as much.
From personal experience, as well as reading the tone of most of the boat owners on this site, I don't think there is one of us that enjoys the part where you pull up to the pump and pour four digits worth of fuel in. Especially when you know just 10 or 15 years ago, the same load could be had for 1/4 as much.
