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  1. #16
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    ...wildcard: boosted dfi 2 cycle...

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  3. #17
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    Quote Originally Posted by FUJIMO View Post
    ...wildcard: boosted dfi 2 cycle...
    Now you are just stirring it up.
    24 Twister

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  5. #18
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    Quote Originally Posted by FUJIMO View Post
    …boosted dfi 2 cycle...
    The problem with that is that a 2-cycle can’t trap the charge to allow pressurization over ambient. The cylinder is open-ended when the intake port is open, so it can’t build pressure. With a 4-stroke, the exhaust valve is closed for most of the intake stroke giving the pressurized air nowhere to go so it has to build pressure (and density) in the cylinder.

    The only way I can see it working on a 2-stroke to any real advantage is with turbocharging where the exhaust pressure rises as boost increases, thereby holding it in on both ends of the engine, if you will. But anyone who’s ever attempted to balance pressure in a turbo system knows it would take a ton of engineering time and experimentation to get it working properly and at that’s just at wot. And even if it does all work out, we’re a looong way from “stock” at that point.

  6. #19
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    Quote Originally Posted by Z06man View Post
    Now you are just stirring it up.
    ...lol..i know. just mess'n with u guys... (mike, it does work, its been done, at most all rpm's - its just not a cost affective/marketable product)
    Last edited by FUJIMO; 10-17-2021 at 03:50 PM.

  7. #20
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    Quote Originally Posted by FUJIMO View Post
    ...... (mike, it does work, its been done, at most all rpm's - its just not a cost affective/marketable product)
    Which are you referring to? Super or turbocharging?

  8. #21
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    ...august 2nd, 1984...bill correia, using a standard land & sea turbocharged v-6(mercury 200), posted the fastest top speed(130.50 m.p.h) ever recorded for an outboard powered v-hull.** **official NEBA certified flying 1/4 mile trap speed. (the boat was an allison.)

  9. #22
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    Yea, I didn’t say impossible just harder than most could imagine. Ski-doo makes the turbo sled as well, but a lot can be done with a multi-discipline oem design team and a couple years time.

  10. #23
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    BRP has the technology but obviously didn't feel the market is big enough to continue the chase on outboards. Here is their production two stroke turbo sled-they work really well.

    https://www.youtube.com/watch?v=cjsbE4jnX1Y

    Joe

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  12. #24
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    I get to put the fourth prop shaft in one next week. There will be a 28 skater up for sale soon I thinks..

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  14. #25
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    They also use RAVE valves unlike outboards for more efficiency, 165 HP from 850cc = NICE light powerful.

    Wayne Taylor was working on a similar system before he died, been many years I don't remember the specifics.

    Wayne was COOL.

    Lenco







    http://montyracing.com/html/photo.html
    We have invented the world; WE see

  15. #26
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    Quote Originally Posted by Capt.Insane-o View Post
    I get to put the fourth prop shaft in one next week. There will be a 28 skater up for sale soon I thinks..
    ...what was that einstein said, about the definition of insanity?...

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  17. #27
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    Mad Mans power valve project motor that died with him RIP Wayne Taylor

    We have invented the world; WE see

  18. #28
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    Quote Originally Posted by FUJIMO View Post
    ...what was that einstein said, about the definition of insanity?...

    Yeah...well the solution is simple for us fresh water boaters.. other than mercury telling us we are doing it wrong

  19. #29
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    Quote Originally Posted by Capt.Insane-o View Post
    I get to put the fourth prop shaft in one next week. There will be a 28 skater up for sale soon I thinks..
    A good set of thru hub props will solve this issue. I shook the hell out of my LCB and thought for sure that I was going to kill it. Went to a thru hub to keep the air off the blades and bingo-problem was solved. If the guy insist on getting rid of it, please give him my number.

    Joe
    386 527 18fourfive

  20. #30
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    BRP produced and sold the 150HP 3 cylinder that utilized the RAVE exhaust system. When the G2 lineup first came out they were advertising the RAVE system for the 300HO. To my knowledge it never made it to market. Curious as to what the design problems were with it.

    https://www.wavetowave.com/home/2019...ee-cylinder-g2

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