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16-11-2011, 11:09 PM
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#21
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Registered User
Location: falmouth
Boat name: purple haze
Boat make: vector xr 24
Engines: cosworth yb turbo 300
Join Date: Apr 2009
Location: falmouth
Posts: 151
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Quote:
Originally Posted by peterunwin
Having had a fair bit of experience with turbocharged racecars i found that by short shifting and maximising the use of the flat torque curve, lap times were not affected but fuel consumption was as much as 40% less so my guess would be that if you prop to suit the torque not the maximum rpm and don't run w.o.t. the fuel consumption would be dramatically improved. I am sure they will be running very rich at w.o.t. to keep the valves and piston crowns cool, they also seem to have some issues with the number 8 drives breaking.
Peter
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Def right Pete but I found exhaust temps hard to keep down at max torque but seem to drop with rpm , all motors are different and i cant say mine are anything to go by but its quite interesting watching what happens on the fly when you alter things, one thing for sure reliability takes a downward spiral when egt goes up .
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21-11-2011, 05:39 PM
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#22
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Registered User
Country: uk
Location: uk
Cruising area: southcoast
Join Date: Dec 2007
Location: uk
Posts: 528
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1350
just stumbled across this cig with 1350s
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21-11-2011, 06:19 PM
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#23
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Ringle@der
Country: England
Location: Uckfield, East Sussex.
Interests: Water Ski Racing.
Boat name: Both called ‘Irresistible’.
Boat make: Bernico F1 Twin, Monterey 265SC.
Engines: 2 x Mercury 300XS's, Yanmar 315.
Cruising area: South and east coasts. Eastbourne Marina.
Join Date: Mar 2006
Location: Uckfield, East Sussex.
Posts: 758
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1350's
They go quite well in little ski boats as well:
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Irresistible Water Ski Racing Team
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21-11-2011, 06:28 PM
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#24
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Registered User
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: 1,460
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mental!
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21-11-2011, 06:51 PM
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#25
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Registered User
Location: Bournemouth
Join Date: Mar 2004
Location: Bournemouth
Posts: 391
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God bless America for putting big engines in small boats.
Happy thanksgiving, to ya'all.
Cheers Mark
( currently in Dallas )
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You can never go fast enough...
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05-01-2012, 02:03 AM
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#26
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Registered User
Join Date: Nov 2007
Posts: 186
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05-01-2012, 02:11 AM
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#27
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Registered User
Country: Ireland
Location: Dublin
Occupation: Boatbuilder
Boat make: Hydrostream V-king, 650SS OCR ,Ring 21, Ring 18, Phantom 18.
Engines: 300Hp Mercury 2.4, 130 Yamaha, Bridgeport EFI, XR6, Merc 200.
Cruising area: Malahide, Dublin
Join Date: May 2004
Location: Dublin
Posts: 1,803
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Thats pretty awesome, but not sure I'd fancy sitting beside that beast.
I hope the cover is kevlar!
What are the gauges in the back seat?
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05-01-2012, 09:48 AM
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#28
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Registered User
Country: Spain
Join Date: Sep 2005
Posts: 1,726
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Quote:
Originally Posted by Hydrostream
Thats pretty awesome, but not sure I'd fancy sitting beside that beast.
I hope the cover is kevlar!
What are the gauges in the back seat?
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I agree. Maybe the gauges are connected to ejection seats?? 
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05-01-2012, 06:25 PM
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#29
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Registered User
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: 1,460
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Any pics of the whole thing? What is it? How fast?
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06-01-2012, 08:34 AM
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#31
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Registered User
Country: Netherlands
Location: Harderwijk
Occupation: See my website ;)
Interests: duh ......
Boat make: Seaquel 600XS & Seaquel 700XS
Engines: Merc 300XS
Cruising area: Veluwemeer/Ijsselmeer
Join Date: Dec 2006
Location: Harderwijk
Posts: 421
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It's the second 52ft Nortech built with 4x 1350s on #8 drives , they are aiming for 200mph but no official numbers yet , it is sold to the midle east by the way , good thing you wouldnt wanna run it in europe with our gas prices 
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07-01-2012, 02:38 PM
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#32
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Registered User
Location: Essex
Occupation: This & That
Interests: Time Trialling
Boat name: Manx Cat
Cruising area: From Shoreham
Join Date: Aug 2004
Location: Essex
Posts: 161
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Quote:
Originally Posted by Mike Bontoft
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Hi found some photos from the Nor-tech facebpook page - think it must be quite something!
http://www.facebook.com/pages/Nor-Te...7940645&type=3
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