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Thread: My Kilo Motor

  1. #171
    srg part timer 50hptiller's Avatar
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    Quote Originally Posted by 850cc racer View Post
    hey Fiddy hp. ill try to get some good footage at the next (last) race meeting of the season.

    check your pm's man that 13x27 is on its way to you. i hope your built like a small ox. that thing will take some holding.

    850
    shhhhhhhhhhhhh.......... it was top secret...lol...i am fat though

  2. #172
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    Hey Racer,
    I didn't read all 18 pages of this but good luck on the kilo run. Is there a weight rule over there? If not it's within reach.
    I set the NOA record in 1985 with a 49 inch motor on a 13' Critchfield.
    The record was 85.400 MPH I made a one way pass over 87.
    There were no mod 50 parts the rules then was to modify stock parts.

    Good luck, Larry Davis

  3. #173
    Team Member 850cc racer's Avatar
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    Hey mate, the kilo run was back in november, unfortuneately i didnt get enough time to run/tune the motor, so i missed out on running. however have since fixed it..

    i have ran it for about 6 race meetings now, i havent really played with it props, jetting etc needs leaning off a little.
    the motor is very strong and pulls really well! it does 75mph around a course, i dont have anyone catching me so havent had to "make" it work..

    thats a massive speed to be doing!! would you share gear ratio's props used etc? what sort of rpm?

    i have a simalar motor to what u speak of, 49ci single throat front and fingerported that pushes the boat to 75mph aswell.

    driving these little monos is the BEST fun!!

    thanks for posting!

    850

  4. #174
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    That record should be a stock 75 with 15" and a Nitro lower
    can shave the cyl head and rejet
    and thats it I think?

  5. #175
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    haaa 850,,,, was wondering if youve tried a 12" prop??? and increase your pitch,,,, se tunnel andthe other race boats over here i know run a 12*25 or so!!! check with ron hill,,, he deff would know,,,, more ime sure ....just a thought...

  6. #176
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    Yes it was a 75 nitro gear case with stock gear ratio. The only props I had was 23's so I borrowed a couple of 25"s I don't remember the diameter, it was turning around 7300 the best I remember.
    The rules then was you could do what you wanted with the stock parts.
    "ported with cut head" and run on gas

  7. #177
    Team Member 850cc racer's Avatar
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    powerabout: the rules have changed over the years from what i can gather, and have now locked and loaded those records in place.
    the 1250cc open hull was set with an FT motor.
    several different people have told me the 1250 mono record was set with an FT
    its an interesting one.

    formeone: i run 12x23 long tubed cleaver, 2-1 ratio.. when a kilo comes around again ill play with 2.4-1 (stock) ratio and also my 1.87-1 nitro. see what combination works best.

    jake: that is fair going!! what ratio was that one? i like the critchfields nice looking hull!

    850

  8. #178
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    Its a 15:28
    Photobucket

  9. #179
    Team Member 850cc racer's Avatar
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    hey mate that thing is sitting perfect!!!!! its make me want to get mine out and take it for a spin see what it would do set up in kilo form!


    thanks so much for the pic!!!

    850

  10. #180
    Team Member 850cc racer's Avatar
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    update: just did 78MPH

    starting to come on nicely. still a few jetting issues to sort out needs to be leaner.

    850

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