Let me pick your brain

Discussion in 'Motorized Bicycle General Discussion' started by philymitch, Mar 31, 2009.

  1. philymitch

    philymitch New Member

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    Whats up guys I was just watching TV and had a thought. Some of us say a boost bottle helps throttle response and some say it don't work at all. Now what if you use the same set up but instead of the boost bottle you would use a propane bottle. So after the motor is started on gas you could interduce a small flow of propane gas to the mix using a torch valve. What do you guys think... could it be to much for the motors?

    .duh.
     
  2. toytime

    toytime New Member

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    I don't think I'd play around with a bomb near my crotch!
     

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  3. mechanickid

    mechanickid New Member

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    hahaha! wow toytime.

    i dont know anything about this sort of stuff, but it sounds hard on the engine.
     
  4. cityevader

    cityevader New Member

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    If using propane instead of 2-stroke gas, where is the oil going to come from?
     
  5. philymitch

    philymitch New Member

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    You would still use gas and oil. The propane would be connected to the intake ...between the carb and the motor..... only when riding would you interduce the propane to the intake adding propane to the gas and oil mix. It might help with pulling some of those hills the motor might need some help with. i wouldn't run it to long with the propane...... Kinda like a shot of nos with out the hi price set up.
    Propane is like 110 octane or 115 octane. Might give a little boost?
     
  6. cityevader

    cityevader New Member

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    in that case, you're adding extra fuel...where's the extra oxygen going to come from?
     
  7. philymitch

    philymitch New Member

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    I went and did some research on google and this is what I found it has the same concept as I have in mind just introducing the propane after the carb.

    Propane-Fueled Moped
     
  8. mechanickid

    mechanickid New Member

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    it seems like the problem with the system you linked was still getting more oxygen into the mix unless i read it wrong.
     
  9. philymitch

    philymitch New Member

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    Yes he was trying to use the propane before the carb..... I think you need to use it after the carb in the intake as a boost.
     
  10. philymitch

    philymitch New Member

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    #10 philymitch, Apr 1, 2009
    Last edited: Apr 1, 2009
  11. a_dam

    a_dam New Member

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    I see at least 2 problems. Even if introduced after the carb, the propane needs oxygen to burn. I the carb is set to deliver a proper air/fuel mixture (which I hope is the case), then you pump propane into that mixture, it will be too rich (needs more air). Also, since motors suck the mixture in from the carb, pumping propane in after the carb will result in less air/gas being delivered.

    Now, I'd like to see you (anybody but me) try fuel and oxygen. I bought a small setup for brazing. It has 2 small tanks, the size of small propane tanks, one with MAPP gas and one with oxygen. Mapp seems pretty close to acetylene. Pump a mixture of that in your motor. That should give you a boost!
     

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