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#1
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Aside from that you should never use ethanol fuel in 2 strokes.
we used to mix ethanol into the gas in our outboards when I was kid to increase hp (local law limited hp to kids under 12 to 10) and it made our boats go faster. why can't you use ethanol in 2 strokes? |
#2
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You can use straight ethanol if you want ..... but you have to change
the jets in a carb or change the 'open' interval in a TBI or Injection system. Ethanol burns hotter and more completely but requires a much richer (fuel/air ratio) mixture. For simple injection systems all that needed is to increase the fuel 'rail' pressure a bit to affect MORE fuel pressure to the injector(s). For a carburated engine the old 'rule of thumb' when rejetting was to double the orfice diameter when running on straight ETOH .... thats 180 proof, hic, ..... *;‹s Depending on the coloric value of the fuel, 90% ETOH required 4 times the volumetric flow in comparison to 100 Octane gasoline. For the original poster who was complaing of hesitation, etc. with ETOH 10% ... you need to change the injector 'open' interval value or consider changing jets to affect a richer mixture. In article , JAXAshby wrote: Aside from that you should never use ethanol fuel in 2 strokes. we used to mix ethanol into the gas in our outboards when I was kid to increase hp (local law limited hp to kids under 12 to 10) and it made our boats go faster. why can't you use ethanol in 2 strokes? |
#3
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does anyone remember "green bug juice" racing fuel? Sometimes known as "canned
horsepower"? You can use straight ethanol if you want ..... but you have to change the jets in a carb or change the 'open' interval in a TBI or Injection system. Ethanol burns hotter and more completely but requires a much richer (fuel/air ratio) mixture. For simple injection systems all that needed is to increase the fuel 'rail' pressure a bit to affect MORE fuel pressure to the injector(s). For a carburated engine the old 'rule of thumb' when rejetting was to double the orfice diameter when running on straight ETOH .... thats 180 proof, hic, ..... *;‹s Depending on the coloric value of the fuel, 90% ETOH required 4 times the volumetric flow in comparison to 100 Octane gasoline. For the original poster who was complaing of hesitation, etc. with ETOH 10% ... you need to change the injector 'open' interval value or consider changing jets to affect a richer mixture. In article , JAXAshby wrote: Aside from that you should never use ethanol fuel in 2 strokes. we used to mix ethanol into the gas in our outboards when I was kid to increase hp (local law limited hp to kids under 12 to 10) and it made our boats go faster. why can't you use ethanol in 2 strokes? |
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