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12-16-2005, 03:30 PM #1
Any news of the 2006 Evinrudes with exhaust valves?
Weren't some '06 Evinrudes going to get exhaust valves?
Any news on the topic?Last edited by Markus; 12-17-2005 at 12:25 PM. Reason: Fixed title
Markus' Performance Boating Links:
www.toastedmarshmallow.com/performance
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12-16-2005, 03:36 PM #2
All of your questions will be answered at the Miami Boat Show - and I'll report on it the very same day with photos.
Greg
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12-16-2005, 03:41 PM #3
2.5l 200 has powervalves.
Was announced a long time ago. I don't know how they run though.
On the more up and up. Bombardier has signed a deal with Petronas to build hi performance engines!.
RT2023 TUFF 25
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12-16-2005, 04:46 PM #4
Yes, press release posted here. Looks like 2006 will be a great year!
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12-16-2005, 04:59 PM #5Screaming And Flying!
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Power Valves
I remember when first two-stroke street bikes came out - specifically the Yamaha YPVS. That was a sweet running motor at the time. Sure took the peakiness away from the RD350.
In case some of you don't know, two-stroke street bikes hung around a little longer in Canada. I think in the US they tried catilityc converters but you can imagine how well that worked.Last edited by Riverman; 12-16-2005 at 06:37 PM. Reason: Added heading
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12-16-2005, 06:24 PM #6
I was just going to say, the first RZ 350 's with the powervalves and the RZ 500's were awesome ! All current 2 stroke moto crossers and road racers use this technology to make a very broad ,usable powerband . Imagine a wildly ported 260 with a powervalve setup to make it idle like a 150 !!
" The Fleet of Old Boats "
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12-16-2005, 06:30 PM #7
why don't the outboard manufacturers do away with reeds and go the a rotory intake valve (RAVE) similar to what the older ski-doos had?
John E.
HydroStream Vandal 140 EVINRUDE 69mph GPS
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If It Ain't Blown It Sucks!
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12-16-2005, 06:38 PM #8Screaming And Flying!
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Originally Posted by Tom Foley
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12-16-2005, 06:41 PM #9Screaming And Flying!
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Originally Posted by chynewalkr
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12-16-2005, 07:01 PM #10Originally Posted by RBTMarkus' Performance Boating Links:
www.toastedmarshmallow.com/performance
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12-16-2005, 07:35 PM #11Originally Posted by Markus
The best thing for mercury racing would be a BRP High perf division. There is nothing to compete with Merc in that arena, and as long as thats the case, they will keep raising prices for the same stuff. as far as BRP high perf outboards, there has been nothing even hinting other than heresay and bullsh1t. With the Miami boat show this close, they would have been putting some form of teaser out there to get the people to the show, IF they had an unveiling planned...> Stainless steel Merc cowling plates - $110 shipped TYD - LINK <
1979 16' Action Marine/2.5L Merc S3000 - Metalflake Maniac
1984 18' Contender Tunnel/2.4 Merc Bridgeport
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12-16-2005, 08:19 PM #127000 RPM
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Nope. For what its worth, I think it means Rotax will design and build some cycle engines for Petronas.
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12-16-2005, 08:46 PM #13
RAVE vs. rotary valve
Ski-Doo's RAVE valves were/are variable height exhaust valves; they had nothing to do with rotary intake valves. Rotary intake valves are not new; well before Ski-Doo/Rotax used them in their high-performance snowmobiles (beginning in the early 1970s), Johnson used them in outboards in the 1930s. They are not used much today because they are more expensive to incorporate and manufacture in the design of an engine, whereas reed valves are easy and cheap to design and build.
JWTjr.
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12-16-2005, 08:58 PM #14Screaming And Flying!
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Aircraft engines? Before BRP split from their parent company several years ago they were already building certified light aircraft engines. I've always thought Bomb was on the verge of offering a larger line of engines, the market sure is ripe for something new. Hmm, their website down right now...
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12-16-2005, 11:49 PM #15Originally Posted by chynewalkr
John left out that reed valves are automatically variable from idle to wide open - a rotary valve usually has fixed timing
Even the 200hp, 30 ci racing outboards use reeds these days (some of them have also been power valves) In the past there were experiments with variable rotary valve timing with variable exhaust tuning and some combined power valve/exhaust tuning on racing outboards