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  1. Thread: Cresent

    by JohnsonM50
    Replies
    2
    Views
    824

    It would be, this Cresent might be one of the few...

    It would be, this Cresent might be one of the few that has the long / short tuner setup I read about. The B1 alone is definitely not enough tho, a cash adjustment would have be part of it. The...
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    2,195

    The lower units: Non thru hub, it's significantly...

    The lower units: Non thru hub, it's significantly lighter, has a taller gear ratio [.571:1] and is narrower. It is not by any means aqua-dynamic tho but a fabricated nose helps a little. The biggest...
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    4,286

    Etec's were advertised as powerful compared to...

    Etec's were advertised as powerful compared to competition, that all changes on course of course. To keep one as is and race would be tuff on that reliability. The complications of it being a clean...
  4. Thread: Cresent

    by JohnsonM50
    Replies
    2
    Views
    824

    Cresent

    I have an opportunity to own a Cresent, The owner and I are considering a trade for a decent running B1 type play motor [22ci OMC on a Merc H lower]. Obviously the Cresent more valuable. The guy...
  5. The 22ci has a single carb so balancing that is...

    The 22ci has a single carb so balancing that is moot but at the crankcase inside the reed wall makes sense as to idling. Thanks.
  6. True, just went into putting it together tho,...

    True, just went into putting it together tho, it's at least sounding good pending boat trial.
  7. Well, anyhow, Probably something like easier...

    Well, anyhow, Probably something like easier starts, smoother idling, but most probably not enhanced performance. I'm just going with the reed plate that fits for now. I did chamfer the reed openings...
  8. Crank case compression bypass on 2 cylender motor?

    Question about an OMC 22ci 25hp I'm looking into adding the reed plate and intake from a 31.8 OMC. The bolt pattern fits so it would seem no problem but there is. Why would there be a bypass on the...
  9. Replies
    383
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    125,270

    The low center intake port is part of the mod I'm...

    The low center intake port is part of the mod I'm assuming? Was anything done on the exhaust side?
  10. Replies
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    125,270

    The side carb on this is not new. [It is new for...

    The side carb on this is not new. [It is new for the 31.8], but the earlier late 50's early 60's 35/40's had an available kit to add 5hp that was a side carb. The 2 barrel here is probably from an...
  11. Replies
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    37,318

    [QUOTE=RaisedByWolves;157169]Boat is currently...

    [QUOTE=RaisedByWolves;157169]Boat is currently under construction so pics wouldn't help much.

    Its your basic 14' aluminum vee with two pedestal seats and a front deck with trolling motor and...
  12. Replies
    91
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    37,318

    Sometimes its tuff to tame them and settling for...

    Sometimes its tuff to tame them and settling for it to smooth down at top speed is the best it will get. Outboard race runabouts are prone to porpoising [not all] but are faster smooth. Seen it many...
  13. Replies
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    37,318

    Props are only as good as test results, different...

    Props are only as good as test results, different per boat or motor Genrelly if you do change a prop it only makes sense to try different settings. The manifolds are not that significant as long as...
  14. Replies
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    37,318

    [QUOTE=RaisedByWolves;157157]Quoting myself here...

    [QUOTE=RaisedByWolves;157157]Quoting myself here to keep things coherent.


    Took the boat out and saw no improvement in speed. I was able to trick it into idling with the primer set on cold start...
  15. Replies
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    37,318

    I also see in the pic that you set this up as a...

    I also see in the pic that you set this up as a 31.8 manifold. [clever]
  16. Replies
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    37,318

    The Mikuni slide carbs will probably perform...

    The Mikuni slide carbs will probably perform better to start with. I made up a manifold to accept a 2 barrel carb from an OMC 85hp. Each barrel the same size as the stock single. Each cylinder draws...
  17. Replies
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    37,318

    Generally above 7200 + or - is about it, a...

    Generally above 7200 + or - is about it, a bearing cage fail is the likely reason. Not that an engine couldn't be built to go more but the weight balance alone in these stock is not extremely...
  18. Replies
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    I have had a V block in one hand & a crank case...

    I have had a V block in one hand & a crank case in the other, looking at the possibilities & intend to do it. I know serious gain can be found there from a failed reed experiment. bending the dampers...
  19. Replies
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    8,716

    Good story Steve sounds like fun, not sure I want...

    Good story Steve sounds like fun, not sure I want to know the answer to your Q tho LoL.
  20. Replies
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    8,716

    Yeah I do, & for whatever it's worth it IS mine...

    Yeah I do, & for whatever it's worth it IS mine to entertain. If you weren't so busy telling others how it is according to you you might find there's many very high caliber folks here but instead you...
  21. Replies
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    8,716

    , Yeah, I just found that out. As far as posting...

    , Yeah, I just found that out. As far as posting tho, I'll post as I wish & leave it to the moderators to notify me or block posts if I'm off base. As far as what can & can't be done depends on who...
  22. Replies
    39
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    8,716

    http://i35.photobucket.com/albums/d151/mes355/DSCN...

    http://i35.photobucket.com/albums/d151/mes355/DSCN0449.jpg
  23. Replies
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    8,716

    http://i35.photobucket.com/albums/d151/mes355/DSCN...

    http://i35.photobucket.com/albums/d151/mes355/DSCN0389.jpg
  24. Replies
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    8,716

    Thats a stock manifold. I removed single carb...

    Thats a stock manifold. I removed single carb studs & shaved the aluminum down till it had a flat surface big enough to accept the 85hp 2 barrel carb. I made an adapter plate with 4 studs to mount...
  25. Replies
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    8,716

    Not true, I've done it. With some experimenting...

    Not true, I've done it. With some experimenting got it to work very well on a 31.8 OMC twin cross flow. It was within 1 mph on top & boosted mid range nicely. It also started better....
  26. If I've learn't anything in building RaT motors &...

    If I've learn't anything in building RaT motors & racing it's that what seems 'should be' often is not. My best guess is you want turbulence on the intake side because it can aid in mixing the fuel &...
  27. I don't know much about specifics but from...

    I don't know much about specifics but from experimental experience I can say trying the reeds with the 85 carbs is your best bet & most likely success. Sure you might have to re-jet the 85's but you...
  28. Thread: Nosecone

    by JohnsonM50
    Replies
    131
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    28,051

    I know, I started slow.. paddling lol, then the...

    I know, I started slow.. paddling lol, then the evolution of a lifetime. Once you're into performance boating it all changes. At that point it's wise to have become a seasoned test driver learning to...
  29. Thread: Nosecone

    by JohnsonM50
    Replies
    131
    Views
    28,051

    Propwalk itself can be dangerous to outboard...

    Propwalk itself can be dangerous to outboard racers especially in the flat bottom types like hydro's & runabouts. With a left rotation prop & a turn fin or chicken wing [oval racers] if the prop...
  30. Thread: Nosecone

    by JohnsonM50
    Replies
    131
    Views
    28,051

    Your English is far better than my Finnish ha ha.

    Your English is far better than my Finnish ha ha.
  31. Thread: Nosecone

    by JohnsonM50
    Replies
    131
    Views
    28,051

    They really do work well, vulnerable only to...

    They really do work well, vulnerable only to clogging or running too slow & slow doesn't even count when you're running a pump. On height, the higher the better to a point, then control & traction...
  32. Thread: Nosecone

    by JohnsonM50
    Replies
    131
    Views
    28,051

    hupiveneilija, That's some really nice work...

    hupiveneilija, That's some really nice work you're doing, straight as can be & cleanly feathered. I'm glad you are getting desired results.
  33. Replies
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    My new favorite:

    Bought a new 500MH hull in '14 & went thru some trials & changes to finally get it to work for me. I'm not a racer with alot of winning under my belt, only 6 going into year 7. Actually a boatload of...
  34. Replies
    7
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    3,155

    Gotta be some difference from the 25SS [?] I've...

    Gotta be some difference from the 25SS [?] I've seen you run on it. That IS a NICE hydro!.. Look for the orange Bezoat at the 'Hop'.. pretty close fun there.
  35. Ive tried all kinds of things & conclude reeds...

    Ive tried all kinds of things & conclude reeds would be a break thru. The flat wall reeds are not going to do it tho,tried single & double comp reeds & there's no significant gain so far. On bending...
  36. Thats good to read. It's a funny endeavor...

    Thats good to read. It's a funny endeavor sometimes, but carbs, props, setups all change things, & there is no way to be sure but run. Not about bigger or more as much as what works best. Good Luck...
  37. With low power to be more the goal than speed the...

    With low power to be more the goal than speed the best way to achieve that is a prop change. 10 is pretty low but 9 to 9-1/2 P might do it. You might not be sacrificing much speed either because alot...
  38. The carbs that are not restricted are close...

    The carbs that are not restricted are close enough that any would work. They are easy enough to change so testing is the best bet. I'd think the 35 carb best for overall performance but the 30 is...
  39. Polyester is strong but brittle while epoxy is...

    Polyester is strong but brittle while epoxy is stronger & more flexible. West is considered one of the better if not the best but is expensive. I do find however the cost varies, a local lumberyard...
  40. Ive used 2 brands, West & System 3, both seem...

    Ive used 2 brands, West & System 3, both seem good but West is thicker. There is an old comparison discussion on HR, would be a good read.
  41. I've done this before, rotted floor, bad glass...

    I've done this before, rotted floor, bad glass work & another that went up on rocks. What I took away from that was manufacturers are sloppy where they know the sun don't shine. The supporting...
  42. Agreed, scraped, ground & free of all the problem...

    Agreed, scraped, ground & free of all the problem junk. The wood, maybe it was still green at manufacture time? A problem of some glass boats is constant wetness & stagnant air under the floor.
  43. Fred, your PM's are full.

    Fred, your PM's are full.
  44. Replies
    10
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    8,411

    My pal Reeves ended up with a Sorensen CSR. It...

    My pal Reeves ended up with a Sorensen CSR. It was built by an inboarder I hear & is a TANK! I mean that in a good way tho because racing it he did well despite being almost 20 lb's over. The only...
  45. Replies
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    8,411

    That's a beauty, great lines.

    That's a beauty, great lines.
  46. Replies
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    2,721

    Happened to be at a pals when his Brother in law...

    Happened to be at a pals when his Brother in law showed up with 1. There's a virtual reality goggle too that shows you what the drone cam sees. It is programmable to return the start position if you...
  47. Replies
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    14,108

    champ20B, That's the best description of how to...

    champ20B, That's the best description of how to set up a fin location I've read yet. A question about it, if you were going with a fixed driver position [not driving as a kneeler] do you think...
  48. Replies
    27
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    14,108

    I agree but didn't go there because it seemed...

    I agree but didn't go there because it seemed better handling was the goal more than speed. Racers like the '9' are set up with fins for good reason. Maybe it will not only improve the handling but a...
  49. Replies
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    14,108

    If you do use plywood to pad the transom be...

    If you do use plywood to pad the transom be careful to used a no void marine grade & install it with the grain horizontal. If it were to compress under pressure & vibration your clamps would then be...
  50. Replies
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    14,108

    What I can add might be apples to oranges but...

    What I can add might be apples to oranges but alot of race runabouts have a pad that is about 24" to 30" wide on about 36" overall. The same principle of dead flat pad on a flat main bottom, it's...
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