hmmmm.......(biodiesel discussion)

Discussion in 'General Questions' started by pianoman8t8, Apr 18, 2007.

  1. pianoman8t8

    pianoman8t8 Guest

    anyone ever thought of converting these little engine to run biodiesel? or maybe some kinda gasonline alternative? just a curiousity thing....
    I'm gonna be writing a paper in english class about biodiesel, but i also wanted to hear what you guys/gals have to say about ir, or info...


  2. rcjunkie

    rcjunkie Guest

    Biodiesel can only be run in diesel engines. For that you would need about a 20:1 compression ratio, a way to inject it, time it, and our engines only run at a 6.6:1 ratio.

    You can increase the jetting about 50% and run E85 but there is nothing wrong with using plain old gasoline.

    You should do some more research since it appars you are headed down the wrong track.

    Try this website for starters:
  3. pianoman8t8

    pianoman8t8 Guest

    no offense, but that's where i was trying to go with the alternative to gasoline, a.k.a. ethanol. after i posted my last post, i researched a lot about ethanol, then figured out that the closest gas station that sold ethanol was in Boston, Mass. and I'm just south of Bangor, Maine.... so that idea wouldn't really work anyway. but if i do find someone around here that does sell ethanol, that's be cool.

  4. Its a tough issue for a gasoline two stroke. I guess theres ethanol and methanol. The best bet imo would be propane, but you'll need a special carb/regulator and will have to find a way to get oil into the engine to lubricate. It can and has been done though. Sadly, since your still burning oil you lose the clean burning properties of the propane. If a good performing all natural biodegradable lubricant could be found it could possibly clean up the two stroke oil burning engine somewhat. As dumb as it sounds its going to be hard to find something cheaper than gasoline, easy to get, and energy efficient.
  5. gone_fishin

    gone_fishin Guest

    before i say this, i'm claiming flame-exemption, i already know it's off the hook :p

    i'm a total 2-stroke novice & everything i know about alt.fuels is from the discovery channel...

    so, how come i can't just use a 25:1 ethanol/wesson-oil pre-mix and be done with?

    what attributes would a 2-stroke engine need to possess in order for that totally-stoopid-question to just be a dumb-question?

    after all, this is about atomization (you know, "vapor" stuff) of the fuel for efficient firing...shouldn't we be looking at intake-theory a bit closer? we can always come up with a spark, how exactly do we get the corn to a burnable state?
  6. Guest

    Guest Guest

    The ethanol part is easy, just re-jet so the jet is three times larger than it is for the wesson oil, it won't provide enough lubricity for the engine.

    Those french fry cars run on the cooking oil, but it's not used to lubricate anything.
  7. gone_fishin

    gone_fishin Guest what do we have to do to the wesson to make it sticky enuff? is there maybe another crop better suited to lubrication?
  8. Guest

    Guest Guest

    From the castor bean, used in racing applications, model planes and vintage WWI aircraft engines.
  9. Guest

    Guest Guest

    Totally non-toxic, just don't drink won't be going anywhere for a few days, just going..... :shock:
  10. gone_fishin

    gone_fishin Guest

    corn & beans...boy, talk about "going" :D

    is it doable? a single (& simple) throttle-body injector would be a good first step i think.
  11. Guest

    Guest Guest

    Well if you ran an ethanol and castor oil mix, you could just re-jet and run the engine as-is...the only drawback is you'd go from 150 mpg's to around 50. :sad:

    Plus, I think it would be cost prohibitive from the standpoint that castor oil ain't cheap and neither is ethanol. :x
  12. gone_fishin

    gone_fishin Guest

    it's only "not cheap" because we haven't put it to good use yet, no?

    plus...i think you could do better than 50mpg. my original assertion that intake is the big issue still stands.
  13. rcjunkie

    rcjunkie Guest

    You won't need to triple the size of the jet.

    Gas engines run at 14.2:1 fuel:air ratio
    Ethanol runs at 9:1 approximately fuel:air ratio

    Since E100 isn't commercially available and would contain 4% water content (it is impossible to obtain 100% pure alchol from distillation, see your chemistry class notes regarding azeotropes) your best bet is E85 which is easily available.

    Note: ethanol engines don't last as long because the ethanol washes off residual lube off of cylinder walls in 4 strokes but don't know if same applies to 2 strokes are mixed with oil in the fuel.
  14. bamabikeguy

    bamabikeguy Active Member

    I vapor locked my engine ONE TIME, hiccuped for 30 roller coaster miles on Highway 36, traveling west out of Oberlin Kansas.

    Stopping at a small engine/ATV dealer, he told me to dump the "corn blended gas" I had in my tank and spares, gave me enough major brand mid grade to get me 100 miles farther up the road.

    rcjunkie's comment is one the mark, because blended gas is prettymuch unregulated, and water content is such a problem that later, in Oklahoma, I heard of entire towns that banned the sale.

    Thank you Saab for providing me the answer to all future questions by interested customers: