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  1. Replies
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    What kinda speeds are you seeing?

    What kinda speeds are you seeing?
  2. https://www.fastonwater.co.uk/torenvliet.html

    https://www.fastonwater.co.uk/torenvliet.html
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    Very nice boat, was most likely raced in T850 ...

    Very nice boat, was most likely raced in T850

    yes, I believe David is still alive.

    Short 15" mid that is stock
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    You need to measure the Venturi to see the...

    You need to measure the Venturi to see the difference between the 60 and 70 carbs
  5. Replies
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    836

    Omc 3 cylinder 15" nitro case is 1.86

    Omc 3 cylinder 15" nitro case is 1.86
  6. Replies
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    Niiiice!

    Niiiice!
  7. Thread: Nosecone

    by LittleCharger
    Replies
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    17,802

    Nice number 👍

    Nice number 👍
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    Looks to be a Yamato 202

    Looks to be a Yamato 202
  9. Replies
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    You need the deck heights as well to make things...

    You need the deck heights as well to make things relevant
  10. Replies
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    I believe he has raised his exhaust port height...

    I believe he has raised his exhaust port height so there is a difference
  11. Replies
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    Thanks Mike that was what I had thought but...

    Thanks Mike that was what I had thought but always nice to hear straight from a top builder of the 3 cylinders...cheers,
  12. Replies
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    12,781

    Mike for the X motors you build which block do...

    Mike for the X motors you build which block do you prefer the oval port or Bridgeport as your base...cheers
  13. Replies
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    95hp

    95hp
  14. Replies
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    Jennings article on plug reading. Tough to read a...

    Jennings article on plug reading. Tough to read a plug properly if you can't see the area you need to for jetting. I prefer to read piston wash and use the plugs as a secondary source as well as plug...
  15. the rev limiter is 6700 on a 1995 oval port

    the rev limiter is 6700 on a 1995 oval port
  16. Custom Pistons or welding up top of cylinder to...

    Custom Pistons or welding up top of cylinder to increase compression, same thing the guys do on the 3 cylinder merc's
  17. x2...

    x2...
  18. Replies
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    Seems reasonable to me he's running a sst45 case

    Seems reasonable to me he's running a sst45 case
  19. Replies
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    We run into the 60's no problem with our two...

    We run into the 60's no problem with our two cylinder and we are set up to circle race, limited to sst45 specs for porting and run less compression then a spec sst45 motor. Lots left on the table to...
  20. Thread: Nosecone

    by LittleCharger
    Replies
    131
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    17,802

    We don't run a torque tab on our little race...

    We don't run a torque tab on our little race boats, depending on set up if you can avoid having to run one you experience less drag, if you need one make sure you only make it large enough for you...
  21. Replies
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    We run 25:1 in our two and three cylinder motors.

    We run 25:1 in our two and three cylinder motors.
  22. Replies
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    Were the piston tops clean when you put this one...

    Were the piston tops clean when you put this one back together? if so you are running on the rich side in all three, nothing wrong with living on the rich side if your doing long wide open runs, it...
  23. Replies
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    yup

    yup
  24. Replies
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    8 mm is too thin in my opinion. Heads vary so...

    8 mm is too thin in my opinion. Heads vary so much from the factory, I have one head with a .375 pocket and the thermostat area is 1.25 mm.

    Yes your compression will be down some with that kinda...
  25. Replies
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    we don't run a thermostat but still enough meat...

    we don't run a thermostat but still enough meat in the head at the sst60 spec and even steve's depth's. I have one head that has 1.5mm at the thermostat hole

    if you run the bigger carbs step the...
  26. Replies
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    I think based on what you have removed pocket...

    I think based on what you have removed pocket depth is probably around 0.500, stocks heads vary so you could be on either side of this hence the reason Stephen refers to the pocket depth end result....
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    you must have a bad tach :o

    you must have a bad tach :o
  28. Replies
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    High pressure is actually your friend from a...

    High pressure is actually your friend from a power point of view.

    Need to consider elevation, humidity, pressure and air temp to determine relative air density which is what you want to jet off...
  29. Replies
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    Hard to believe the stuffing is knocking that...

    Hard to believe the stuffing is knocking that much mph off, typically increasing crankcase compression has little effect on top end.

    I don't think you will find any more mph in reed changes...
  30. Replies
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    You can hear if you know what you are listening...

    You can hear if you know what you are listening for but most of the time people find out to late lol...some guys run 21 but they typically drag race.

    Two blade are not as efficient I'd look for a...
  31. Replies
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    WSM and BRP are both 1mm as well. Put the big...

    WSM and BRP are both 1mm as well.

    Put the big pitch on her and spin her up!
  32. Replies
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    raising timing to 19 would help bottom end

    raising timing to 19 would help bottom end
  33. Replies
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    Forgot your were at 17 you could go back up to...

    Forgot your were at 17 you could go back up to 19, just wouldn't add any timing past that.

    Fat is good til you get everything else dialed in then you can work on jetting
  34. Replies
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    Be careful on the timing, the 56er typically does...

    Be careful on the timing, the 56er typically does not like more timing, if your looking for top end you don't want more timing
  35. Replies
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    Bridgeport, combination of things not just head,...

    Bridgeport, combination of things not just head, stock heads vary a lot any where from 30.5cc to 34.5 cc, some commercial heads are 42 cc, so it just depends on the head
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    62152

    62152
  37. Replies
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    Yes you really need to understand what your doing...

    Yes you really need to understand what your doing when moving the transfers, a good block becomes scrap pretty quick. Generally just clean up on transfers. We use to turn in the 7's with a stock...
  38. Replies
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    Did you blow another head gasket? Regardless...

    Did you blow another head gasket?

    Regardless of the piston size you jet each cylinder on it's own.

    Are those needle bearings dirty or on their last leg lol
  39. Replies
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    2 cylinder 60hp carbs are same venturi as the...

    2 cylinder 60hp carbs are same venturi as the 1992 70hp
  40. Replies
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    the Bridgeport 70hp 56er carb has the same...

    the Bridgeport 70hp 56er carb has the same venturi size as the two cylinder. Are your carbs form the 56er 60hp motor?
  41. Replies
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    60 will most likely be too much as that's more...

    60 will most likely be too much as that's more like a 37% increase in area, but I would rather go more then needed and start making some jetting passes and work your way down. I prefer reading...
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    I would fatten your main jet if you have raised...

    I would fatten your main jet if you have raised your ports and bumped the compression, as soon as you load that motor with the bigger pitch prop she is gonna melt the exhaust side out. Main jetting...
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    What size of main jet are you starting with?

    What size of main jet are you starting with?
  44. Replies
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    Keep an eye on the head gasket a tight head like...

    Keep an eye on the head gasket a tight head like that tends to blow them, head studs help
  45. Replies
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    looks awesome !

    looks awesome !
  46. Replies
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    it should crank even with high compression, like...

    it should crank even with high compression, like you said good battery and also a good starter, check for voltage drop at the battery to start and then work you way through, make sure you have good...
  47. You best check your math...they would put you on...

    You best check your math...they would put you on the trailer pretty quick
  48. Replies
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    61651We'll be sure to tell Anthony that his Old...

    61651We'll be sure to tell Anthony that his Old FEH two cylinder with the exact stock carbs in question doesn't work. She's a pain to get on plane but it's a clock start.

    Sure progressive carbs...
  49. Replies
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    I'll quote Dave Bush on this one "Pyros are a...

    I'll quote Dave Bush on this one

    "Pyros are a good reference tool

    Yes and no. Most likely it will be dead before you see any temp changes even with fast pyros if bad detonation is happening....
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    You can run them on a twin, just need to make...

    You can run them on a twin, just need to make your own intake out of aluminum, the reeds in a twin are the same as the v4 reeds

    The issue is you'll won't get the performance your looking for...
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