Fuel Mixture Ethanol/Alcohol as fuel

Discussion in '2-Stroke Engines' started by FelipeCobu, Sep 6, 2011.

  1. FelipeCobu

    FelipeCobu Member

    Hi folks,

    Do someone tried to use ethanol as fuel for MB?

    I know some Kart racers around here in Brazil are using ethanol on their 2 stroke engines, also there are special formulated oils to use with this fuel.

    I can buy ethanol in every Station here.

    What advantages/ problems and what will I have to mod to use this fuel?

    Thanks

    Felipe Cobu
     

  2. dodge dude94

    dodge dude94 Member

    It runs hotter, is more corrosive, and yields less carbon, meaning less *BOOM!* per combustion cycle.
     
  3. FelipeCobu

    FelipeCobu Member

    I don't think the corrosive factor would be important because the premix w/ oil.

    The running hotter factor can be under control w/ ignition timing - compression rate - and Air Fuel Ratio.

    If it runs hotter it means more not less BOOM per cycle, also it needs less air to burn, 14:1 on gasoline against 9:1 on alcohol.
     
  4. dodge dude94

    dodge dude94 Member

    Run it if you wish.
    But I would not recommend it.
    I have a feeling bad things will happen.
     
  5. motorpsycho

    motorpsycho Active Member

    your engine needs to be set up with the right parts to run ethanol.
    these little 2 strokes are not full race go kart engines.
     
  6. Mozenrath

    Mozenrath New Member

    Has anyone actually tried running ethanol in a happy time engine? I keep hearing that it'll either wreck your engine or turn it into a bomb, but I haven't heard of any instances where this has actually happened. I'm not saying that anyone is wrong in saying that it won't work, but I'd like to know if it's been tried before.

    I'm not sure what parts in our engines would be ruined by the ethanol. The fuel line can easily be changed to accommodate if necessary, and the only other thing I can think of that would be messed up would be the carb float. Otherwise, it seems like the only thing that would have to be changed would be the air mixture and possibly the timing.

    Also, since when is carbon a good thing? I know that a certain amount of it will boost compression, but is it really bad for virtually none of it to be present?
     
  7. dodge dude94

    dodge dude94 Member

    You need the right amount of carbon in your gasoline for the fuel to burn.
    Too much and you foul spark plugs and have greater emissions. Too little and you yield less power.


    At least that is what I have found, especially on a non-race engine.
     
  8. Mozenrath

    Mozenrath New Member

    So what exactly is different about a racing engine that removes the need for carbon in the fuel? The Ford Model T could run on either gasoline or ethanol, so I am still not sure why our 2 smokers couldn't do the same(if modified).
     
  9. Mozenrath

    Mozenrath New Member

    Just for the sake of the conversation, I found an article where a guy talks about getting a 2-stroke outboard motor to run on ethanol using purely synthetic oil(since apparently normal oil won't properly dissolve in ethanol).

    http://www.duckworksmagazine.com/06/columns/rob/maib2.htm
     
  10. IbedaYank

    IbedaYank Member

    I have a melted piston on a gt5 from doing this.
    and a Clarke forklift that now will not start
    somebody screwed up and dumped E85 in that stations tanks that does NOT
    have any E85 pumps
     
  11. IbedaYank

    IbedaYank Member

    alcohol uses much higher compression like 14 to 1
    ht china POS uses 6 to 1
     
  12. Sgt. Howard

    Sgt. Howard Member

    y'know, this is an experiment that would not break somebody's bank account as these mills can be had for $80 or thereabouts- I suggest that someone try and see. I'ffen y'all cannot find the stones to do it, perhaps when I upgrade my personal cruiser to a new engine I'll take the old mill and get it drunk just to see what happens... might just learn something, you never know.
    the Old Sgt.
     
  13. Mozenrath

    Mozenrath New Member

  14. IbedaYank

    IbedaYank Member

    Sgt you have not checked the prices lately then....just a topend is $60 bare motors are $130 ...full kits are hitting over $180
     
  15. Mozenrath

    Mozenrath New Member

    Makes me wish I could have bought a whole slew of kits when they were still $130 - $150. I would have at least checked the quality to make it more worth a higher price. I sure hope some American company picks up where the Chinese had to leave off at before they're $300+ per kit!
     
  16. IbedaYank

    IbedaYank Member

    Mozenrath
    ordered a gt5 slant head
    Order Date................................Jun 16, 2011; 12:18:57pm PDT
    Order Number..............................GasBike38@@@
    Terms and Conditions......................Agreed
    Payment Method............................Credit Card

    Subtotal.......................................................$139.00
    Tax (USA: 0%)....................................................$0.00
    Shipping (26 lbs)...............................................$28.14
    GRAND TOTAL....................................................$167.14

    only thing in stock now is the bare motor...
    http://www.gasbike.net/grubee-skyha...ike-motor-only-standard-finish-2909-prd1.html

    $149 for just the motor
     
  17. Mozenrath

    Mozenrath New Member

    True, I forgot they've kept the Grubees pretty cheap. All the Raws and other ones have gone sharply up in price within the past week, though. It's also more difficult to find a place that will ship a Grubee to California. Will gasbike.net do it? I seem to remember I couldn't buy one from them, but maybe things have changed now that they have cornered the market more.
     
    Last edited: Sep 7, 2011
  18. IbedaYank

    IbedaYank Member

    they are in cali...
    and the gt5 kits are out of stock ...kit price $179.00
    http://www.gasbike.net/bicycle_motor_engine_kit_gas_bike_jet_80cc.html

    I'm in tennessee so they shipped to me
     
  19. HeadSmess

    HeadSmess Well-Known Member

    stick to the topic!

    ethanol.

    rejet for it and theres no issue. it is mildly corrosive... but if its available and the oil for it is too, go for it.

    it runs at higher comp ratios cus its naturally a higher octane. unfortunately 2strokes with high compression ratios dont equate to high power.

    who started whining about carbon? youre an ignorant greenie with your head up your proverbial... carbon is a part of life.
     
  20. blue 48

    blue 48 Member

    ill do it im getting a new engine in 2 days and ill do it to the old one and keep you posted. its a rock solid with hi kms on it. ill see what oil will be best, any way i cant seem to kill this engine and it gets run pretty darm hard all week this should be fun
    talk later :) @ headsmess i agree carbon is just a way of life nothing wrong with it. were possibly getting hit with a huge carbon tax soon it a load of #### in all honesty
     
    Last edited: Sep 7, 2011
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