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  1. Thread: Clydes Ride

    by OUTBOARDER
    Replies
    12
    Views
    7,781

    still have the Prop ?

    Is the prop still availeable
  2. Replies
    21
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    5,913

    4 into 1 makin 200hp...

    4 into 1 makin 200hp http://www.youtube.com/watch?v=Ceeyrmn2Pj4
  3. Replies
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    8,852

    If you only knew the level of machine work...

    If you only knew the level of machine work involved in "blue printing" to get optimal performance you would be amazed.
    When I started racing the person I purchased block from had over twenty blocks...
  4. Replies
    38
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    13,881

    these numbers make sense, exh opens at about 87...

    these numbers make sense, exh opens at about 87 deg atdc and trans at about 114 deg atdc (like omc 49)
    thx Sam
  5. Pipes are Colder on water or Vacuum is assisting scaveging or a combination of both

    spray some water vapor also???
    Pipes are Colder on water [(apart from water injection) watercraft tune jacketed exhaust by manipulating water temp surrounding pipe]
    one way to correlate engine...
  6. Replies
    38
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    13,881

    cresent port specs

    anyone know actual Port Specs ????
  7. Replies
    14
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    4,126

    45ss does it getting on plane. will try balancing...

    45ss does it getting on plane. will try balancing tubes soon.
  8. once again for planing hulls that run high speed...

    once again for planing hulls that run high speed = k * sqrt of hp
    more than one boat builder has used it to predict speed of a boat for a change in hp

    let me go one step further with my real life...
  9. Replies
    38
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    13,881

    1978 apba inspection sheet

    Found a link to view 1978 APBA INSPECTION SHEET but did not work..........................:mad:
  10. Replies
    38
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    13,881

    Crescent 500 specs

    Where can I get Crescent 500 cs specs?????
  11. sqrt did not mention cubed

    sqrt did not mention cubed
  12. 14' gw Invader 90 hp = 72 100 = 78. The boat is...

    14' gw Invader 90 hp = 72 100 = 78. The boat is dragging less in water.
    So V(hp) = k*(hp)^.5 works on planing hulls (racing) over small intervals.
    air resistance increases proportionally to...
  13. Replies
    14
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    4,126

    In general larger the dia or area higher...

    In general larger the dia or area higher effective rpms. several
    snowmobile triples have them to help low rpms out.
  14. as Speed insreases resistance in creases exponentially

    as speed increases Resisteance "Drag" from air increases exponentially so does resistance to lower unit.
    Speed as a function of Horse Power thru air alone can be expressed by

    V(hp)air = K *...
  15. Replies
    14
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    4,126

    no , needs to be tuned up

    no , needs to be tuned up
  16. Replies
    14
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    4,126

    help balance intake pulses at low rpms so it...

    help balance intake pulses at low rpms so it trolls around and gets on plane
  17. Replies
    31
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    13,904

    the 21p @ 5500 was 40 mph on the carolina skiff...

    the 21p @ 5500 was 40 mph on the carolina skiff 11% slip , rig weighd about 900 lbs.
  18. Replies
    31
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    13,904

    Brand New OMC BRP 391014 in box. Aluminum prop...

    Brand New OMC BRP 391014 in box. Aluminum prop 11.25" x 21 P

    Fits: JOHNSON EVINRUDE - TWO CYLINDER, SMALL GEARCASE;

    40HP (1984 THRU), 48HP (1987 THRU), 50HP (1975 THRU),
  19. Replies
    31
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    13,904

    http://www.boatracingfacts.com/forums/showthread.p...

    http://www.boatracingfacts.com/forums/showthread.php?7565-Clydes-Ride

    different project with a 1985 40 converted
  20. Replies
    31
    Views
    13,904

    11.25 x 21p omc

    aluminum 11.25 x 21p omc on 1996 stock johnson 20" 50hp , the 11.75 x 19 ran about 40mph
  21. Replies
    31
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    13,904

    had a stock 96 50 johnson on a 16' Carolina...

    had a stock 96 50 johnson on a 16' Carolina Skiff Ran 43mph cosistently with a 21p omc alum prop.
  22. Thread: My F4s

    by OUTBOARDER
    Replies
    5
    Views
    2,747

    CHET HERBERT Any cam any grind $39.95 :rolleyes:

    CHET HERBERT Any cam any grind $39.95 :rolleyes:
  23. Replies
    9
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    3,594

    work on most outboards

    the stacks in pic are worth 2 jet size increase on modfied 45ss along with rest of intake system mods.

    tuned length of reed valve two stroke is measured from tip of reeds to end of velocity stack....
  24. Replies
    6
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    6,306

    Russ dodge , pole cat 1 litre mod

    RUSS Ran Inland Jets kawasaki 1100/900 pipe and set a kilo Record with it. I purchased a Inlandjet system yrs ago to measure the system.
    It added made +20 hp over OE Exhaust System and really...
  25. Replies
    81
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    15,600

    A "certified" Test wheel could be used to...

    A "certified" Test wheel could be used to identify motors that have a "unfair" advantage vs the rest of the field...................
  26. Replies
    217
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    49,790

    I vote for the block you can not use in OPC SST-60

    Do you know what Time Area and blow down are? Area by itself is a small slice of the pie.

    I vote for the block you can not use in OPC SST-60

    http://www.wptracing.com/sst-60

    "Modified Package...
  27. Replies
    32
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    4,955

    30 lbs over weight cant air out

    30 lbs over weight cant air out
  28. The conn rod is not from a triple...

    The conn rod is not from a triple though.........................
  29. It is a 197? 50, piston I GUESS , how much does...

    It is a 197? 50, piston I GUESS , how much does it weigh? How much is scrap aluminum worth?
    If you go on ebay the site is spammed with that junk!
    I ONLY use new Parts, makes it easier to sleep at...
  30. Pre- 1980's , cast rod, measure dia its not 3.2"...

    Pre- 1980's , cast rod, measure dia its not 3.2" 81mm .............
  31. Replies
    34
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    6,873

    depends on prop, copy something that works and...

    depends on prop, copy something that works and improvr if possible.
  32. DAH Props has a wall of nothin but the Originals....

    DAH Props has a wall of nothin but the Originals. I would look for a original sst-60 or Super E wheel.......................
  33. 2000 35 hp 3cyl

    [QUOTE=ratherhunt;42550]I have a 2000 Johnson 20 Jet its suppose to have a 25 hosepower head . It came new from the Johnson dealer with the jet.I am trying to figure out what I need to convert it to...
  34. look again

    the first pic piston on left is original, the orignal cast are on ebay some times
  35. comparison

    hope these help
    Latemodel , original 326100

    +0.020 Wiseco's , cryoed by 300 below, thermal coat on top, poly moly on sides by Swain Tech ,
    next to pair of machined sleeves to hydro w/pipe spec...
  36. Replies
    7
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    2,167

    send it out unless you have back-up

    Send it to WIENDANT he prefers oval port 56 and by far has most experience with the OMC 56gi . http://www.wptracing.com/sst-60

    or Howard Richards (Ran OMC's Second Effort Porting, develepod...
  37. Etec 60

    There are several things that are done by OPC Engine buillders to work around 45 OPC engine rules/inspection and in the end it makes a new "blue printed" prepared "STOCK" 45ss Engine cost more than a...
  38. I belive so

    I believe that original 326100 60 hp fishin engines did. I am guessing that when lost foam 50 came out in 89/90 i think that the pistoin skirt cut outs became rectangular w/o extra cut out wrap...
  39. Nla original omc 1985- 60hp 2 cyl pistons breath better than available pistons

    The NLA ORIGINAL OMC 1985- 60HP 2 CYL PISTONS BREATH BETTER THAN AVAILABLE PISTONS............

    The cut out's in the skirts allow more air to flow into transfer ports when the piston is a BDC and...
  40. Replies
    3
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    2,809

    Hydro tec marine performance

    Contact Hydro Tec they sell both old slant and new semi-hemi for your motor.

    http://yamaha-rebuild.com/Yamaha%20High%20Perf.htm

    why guess?
  41. Aluminum 56 Rod Concept

    There are some relatively new Aluminum Alloys and Processes out there one vendor has succesfully made rods that are used in small block V-8's on the street with reliability . the down side is they...
  42. Potential

    Spoke to Second Effort Tech who develeped Mod 50 Porting for the Engines sent to Europe back in the 70's.
    From our many discussions he said the short coming of the engines were the cast steel...
  43. 220 gram 56/49 custom rod

    220 grams , found centermain sleeves to use for custom 56, 49 or 45 rod
  44. Replies
    12
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    6,434

    2000 omc 50

    The 2000 50 Cylinder head can be milled to 45spec 0.515" deep, stock is approx 0.560" worth about 5 hp and will run on 93 octane pump gas.
    You can go up on timining , the 60hp twins ran 21 deg from...
  45. Replies
    1
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    1,254

    56 f3 bottom end simulation

    Still workin in Autodesk Inventor Suite, lookin at next project.
  46. Outboard engine crankshaft center main split outer race search

    working on the project and need a Bearing with Split Outer Race.
    Looking for 1.625" - 1.5" O.D. Split Race.

    PART # & Dims of AVAILABLE SPLIT OUTER RACE bearing you know of would help.
  47. Replies
    8
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    4,623

    how much is it worth to you

    have a mint nitro foot with 15:28 gears, let me know if your interested.
  48. Replies
    0
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    1,393

    45SS PIPE for stock porting

    New Dell XPS 17 Laptop Loaded w/Autodesk Invetor Suite 3D/2D
    Working on Design for "Stock" 45 Pipe based on aftermarket RD Rev II Pipe for Yamaha Superjet.
    First pipe was a early RD 750zxi pipe...
  49. Replies
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    4,623

    gear ratio's for OMC 40-75 hp "small gearcase"

    12:29
    15:28 - about $600 us for pinion, fwd, reverse & sst 60 clutch dog.
  50. Water routing and cooling system

    The old man at the shop and his son showed me some outboard drag tricks the used on their Yamaha v6.

    They wanted to have engine cylinders at operating temp approaching start.
    cylinder heads about...
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