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Thread: New 4 stroke race engines?
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12-16-2014, 09:56 AM #1365000 RPM
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Hi��
If I look at various tests in Norway most of the 24-25 feet boats tested with 250-300 hp range is it E-Tec, Optimax, Yamaha SHO. Etc consumes 1,1-1,2 litre per nautical mile. My boat consumes 0,85-0,95 litre per nautical mile. One nautical mile is 1,852 km. One us / uk mile is 1,609. I gallon is 3,8 litre. My old PM 300 consumed 1,6 litre plus per nautical mile. I have in fact less litre per nm at wot with the 350 sci than cruise with the PM 300.
Cheers Toffen
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12-16-2014, 11:37 AM #1375000 RPM
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12-16-2014, 07:20 PM #138Screaming And Flying!
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12-17-2014, 06:37 PM #139
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12-17-2014, 07:04 PM #140
I think the point is Yamaha copied themselves...naming the outboard after the Vmax snowmobile that was named after the Vmax motorcycle...which was named for the short form of maximum velocity...Vmax....not Blackmax which was named after a 70's pirate with a flowing beard...
'08 SRV
Yamaha 3.1 Phase III
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12-17-2014, 07:29 PM #141Screaming And Flying!
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I'd like to see the old 300 that can use double the fuel that the new one does
Maybe the new one can fill the tank as well?
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12-17-2014, 09:48 PM #142
2stroke vs 4stroke settled
<iframe height="315" src="//www.youtube.com/embed/ZmvuQ-UShns" frameBorder="0" width="560" allowfullscreen=""></iframe>
Mirage Jaguar RiverRacer
Polaris PRO785
Bennington 255LCC
Scream & Fly Flying Machine of the Month: September 2005
http://www.screamandfly.com/showthre...ild&highlight=
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12-17-2014, 10:19 PM #143Wriggleys gum makes me think of boating, "Double your engines, Double your fun"
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12-17-2014, 10:40 PM #144
Awesome! I been a motocross racer for near 40 years. Went thru the 4 stroke craze for more than the last 15 years and now went back to the old technology. Even though (twice the displacement 4 strokes) have gotten close to the weight and handling of 2 strokes, 4 strokes cant match the power and explosiveness of an equal displacement two stroke. But... the modern 4 stroke motocross bike is now within 15 pounds of a two stroke with the reliability of a two stroke ( but more cost for rebuild). Why cant Yamaha or maybe Honda get with the program and do the same with outboards? Look at Porsche and Subaru with the boxter car high HP light weight engines.
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12-18-2014, 12:21 AM #145Screaming And Flying!
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Brilliant!
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12-18-2014, 12:23 AM #146Screaming And Flying!
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12-19-2014, 01:36 PM #1475000 RPM
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I just continue to gather v6 Omc 2 stroke stuff and buy Dave Bush kits. 400 horsepower on a lake boat with 350 lbs of torque under 400 lbs all on pump gas. As Forrest Gump would say,"and that's all I have to say about that"
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12-19-2014, 02:05 PM #148Screaming And Flying!
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Hi Freddie
Do you have a spare sst100 cowl in any condition or know somebody that can make me one?
thanks
Sorry for the hijack
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12-21-2014, 11:59 PM #1495000 RPM
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It's in the works
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12-22-2014, 12:29 AM #150Screaming And Flying!
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Ok
Thats great news
Merry Christmas
Cheers
P