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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Engine Conversions >> how small can gas/glow go?
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how small can gas/glow go? - 6/21/2009 8:05 AM   
jimmyjames213



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well i have been pondering the idea of useing gasoline to power 40 sized engines.
realizing that because of weight and lack of power issues all gasoline 40 sized engines, may be out of the question?

so then i read about gas-glow, could it be a solution?
from what i understand here are the problems
lack of oil, a 2:1 gas to glow fuel doesnt have engough oil for the piston/conrod bushings
carb issue, need a gas carb since the fuel-air ratio is different than glow,
gas burns hotter which may or may not be a problem
needs a ringed engine, limiting engine choice
will the glow plug stay lit?
not as powerful as all glow engines

heres a few ideas on how to solve these issues.
i know their are oil's that will mix w/ methanol and gas (is castor one of them? i dont think so) but you could use gas for say 60% of the mixture, glow for 25% and oil for 15% (plus that in the glow fuel already)
what if you use e85 instead of gasoline, that may solve the carb issue since (from what i have read) e85 and glow fuel have similer air-fuel ratio's
will the plug stay lit on e85, or does the catalitic reaction not work w/ ethanol (if not could you just have on board glow that ran all the time?)
if so could you just run e85 w/ no glow fuel and a whole lot of lawnboy oil?

as for the power problem, has anyone tried running gas/glow on a wankel roatational engine, they do use a lot more fuel but produce more power than a piston engine (if useing gasoline who cares about fuel consumption rates in such a small engine) and they are "4 stroke" which gives them that cool sound

i am thinking of trying this w/ a super tiger g-40 ringed engine. its only 50 bucks, if it doesnt work ill just use glow (or will the gas totally screw up the carb?)

also
has anyone mixed small amouts of gas w/ glow fuel, say 5-20% and ran it secuessfully in a glow engine with no mods?



< Message edited by jimmyjames213 -- 6/21/2009 8:09 AM >

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RE: how small can gas/glow go? - 6/22/2009 6:02 AM   
jimmyjames213



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Status: offline 		anyone tried this? any feed back on where to start? oil/gas ratio's?
i will break in the engine on glow, them try e85? maybe?
av8tor? any feedback, do you think it will work?



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RE: how small can gas/glow go? - 6/22/2009 6:42 PM   
av8tor1977



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Status: offline 		Basically I just don't recommend using Gas/Glow in small glow engines.  Too many problems with the bushed rod and it's lubrication needs, the fact that the engine is designed specifically for methanol, etc.  Overheating is a possible problem due to the fact that gasoline engines run hotter as well.

Also, I didn't personally have luck with E-85 in the gasoline engine conversions to Gas/Glow, but some here in the forum have had various levels of success with it.  Do a search for E-85 in this forum.

If you are just looking to economize, one can mix small amounts of gasoline with glow fuel to stretch it.  Just make sure you keep the overall oil content correct.  If the particular engine has no silicone parts like some pumped engines have, it should cause no damage, and the needle won't be too sensitive unless you go to high percentages of gasoline.  I would try 10% to start.

AV8TOR

< Message edited by av8tor1977 -- 6/22/2009 7:01 PM >

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RE: how small can gas/glow go? - 6/22/2009 7:55 PM   
captinjohn


 

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Status: offline 		A much better way to "economize" is to mix your own glow fuel using strait mentanol (about $2.85 per gal) and then use klotz oil.  No nitro...but use a good hot 4 cycle glow plug.   Capt,n

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RE: how small can gas/glow go? - 6/23/2009 6:14 AM   
jimmyjames213



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quote:

ORIGINAL: captinjohn

A much better way to "economize" is to mix your own glow fuel using strait mentanol (about $2.85 per gal) and then use klotz oil.  No nitro...but use a good hot 4 cycle glow plug.   Capt,n


their is no where that i have found to get methanol in the kc area. i would have drive 3 hours to get the fuel which would make it pointless. now if you know somewhere i could get methanol i would much rather do that.
although if i could get a .40 to run on gas that may be a better for all of us. (key work.....IF)

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RE: how small can gas/glow go? - 6/23/2009 5:21 PM   
captinjohn


 

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Status: offline 		Small .40 engines was run a lot many years ago back in the 1940 days.  Most had a set of points on the front and many had a little lever to advance & retard the timing.  The oil used was real heavy and Texico was used maybe the most.  The engines had thinner...but more fins on cyl & head for good cooling.  You may be able to use a Helicopter engine...which is set up better for cooling.  You see, gas engines runs some-what hotter than glow engines.  Just make sure the cooling is very good and use plenty of oil in the gas.  About 20% oil.   That means out of a gallon of fuel about 1/5 will be lubricating oil.  That should help you out!   Capt,n

< Message edited by captinjohn -- 6/23/2009 5:23 PM >

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RE: how small can gas/glow go? - 6/24/2009 1:51 AM   
mapnet



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Status: offline 		On small(0.19 to 0.60 cu.in.) spark ignition engines we used 3 parts gasolene to 1 part #70 wt. non detergent motor oil.

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