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  1. #1
    ph2ocraft's Avatar
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    220 pounds of compression

    Well I found some 85mm domes floating around and they are marked 32cc, I decided what the hell. Let's toss them on and see what happens.

    No hesitation, I can burn the prop all day long and it simply hauls ass.

    The question and bet, is how long will the cylinders/rings/pistons last on 110 or 112 octane?

    Get your calculators out, place
    your bets...

    This far 30 minutes ride time with 110 octane and we just kicked it up to 112.


  2. #2
    Moderator beerdart's Avatar
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  3. #3
    Click avatar for tech links/info, donation request K447's Avatar
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    This is on your Matrix engine, with triple pipes?

    How much power do you think that engine is making in this configuration?

  4. #4
    rustyrider's Avatar
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    holy crap! that is sick!!!!!! thats gotta fly! im a n00b, are you running stock internals with that?

  5. #5
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    If you let Paul the plumber ride it, my guess is another 5 mins.....

  6. #6
    What ski? We ran 200lbs of compression in our first limited Pro 785 and it screamed, for about two races. That was WAY too much compression to make it reasonably reliable.

  7. #7
    Lake Mead Bum & BTLS Mark starflight's Avatar
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    I have a 225psi 100cc piston ported Comer engine on one of my go carts. It only has a couple of hrs of run time.It really screams!!! How long will it last? What will blow out 1st? The crank?

  8. #8
    ph2ocraft's Avatar
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    it is in the matrix and the goal is to beat on it until Friday. I'm going to rebuild her pretty soon so I figured we'd have a little fun In the meantime. I had a set of domes laying around and Liz really wanted to rode so here we are. Saw a little greyish-silver on Cyl 1 plug yesterday evening.

    I don't know if we'll make Friday but man this is a hell of a ride.

    Keep you posted, pictures to follow I'm pretty sure...now where is that full circle 1200 crank???

  9. #9
    ph2ocraft's Avatar
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    Quote Originally Posted by starflight View Post
    I have a 225psi 100cc piston ported Comer engine on one of my go carts. It only has a couple of hrs of run time.It really screams!!! How long will it last? What will blow out 1st? The crank?
    My guess is ring land or gland or whatever it's called

  10. #10
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by ph2ocraft View Post
    it is in the matrix...man this is a hell of a ride...
    What impeller pitch are you using to harness that power?

    Hitting the rev limiter?

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