Trailryder42
Member
- Feb 6, 2000
- 295
- 0
Trailryder42 said:Because it's not the volitility of the oil in the premix that creates an ignitable mixture with air for the combustion process, it's the fuel.
Rich Rohrich said:while other oils really disrupt the combustion process, and adding more oil just makes things worse. ;)
Rich Rohrich said:That isn't necessarily true. The oil can have a significant influence on the combustion process.
It's never as easy as it appears on the surface is it? ;)
Trailryder42 said:Thanks Rich, I do realize that but wasn't gonna go there. I should have said "oil isn't the primary medium in the combustion process". Altho the oil isn't as refined as the fuel, it's still a petroleum distilate and if atomized sufficiently will contribute as you say.
steve125 said:Easy Rich, your just encouraging the 100:1 ratio posts with that.
atomarc said:If makes it more clear for me when I think in terms of , "the ENGINE is rich or lean", and the " FUEL mixture is rich or lean"...two different things. One is dependent on the other, but for me, it simplifies it.
Stuart.
oldfrt613 said:Holy cow ! Nothing like stirring up techno guy's.
I use the oil mix ratio to tune for temperature extreams. So once I get a bike dialed in for my "normal" riding, I use the ratio change for temp extreems. For example, I tune in my normal temps at 40:1. Then it gets hot and steamy I will back off to 32:1 - in the winter I will run 50:1. I find this easier than screwing with the entire jetting system. It has worked for years for me.
So, I am adjusting the amount of fuel by adjusting the ratio, however, I am not "playing" with the ratio when I'm doing my tuning. In tuning you need to adjust out each circuit - changing the ratio ( for a given oil ) changes availible fuel across the board. PS - I only run race gas - because pump fuel is inconsitent - which is just another variable to deal with ( one you have no control over ).
OK Let the sparks fly !!!!!
oldfrt613 said:Since we are metering fuel ( the primary cumbustable ) richer has a higher ratio of fuel ( 50:1 is richer than 32:1 ). From all my dealings, tuners will use this convention. It's only my bone head friends who can't figure this out. They fowl plugs, reduce the oil thinking thats what fowled it ( richen the mix ) and realy get confused when it keeps happening. I go through this time and time again. The basic misconception is that the oil is the only thing that can foul a plug. It's hard for them to understand that that little spark can only ignite so much fuel.
oldfrt613 said:Since we are metering fuel ( the primary cumbustable ) richer has a higher ratio of fuel ( 50:1 is richer than 32:1 ). From all my dealings, tuners will use this convention. It's only my bone head friends who can't figure this out. They fowl plugs, reduce the oil thinking thats what fowled it ( richen the mix ) and realy get confused when it keeps happening. I go through this time and time again. The basic misconception is that the oil is the only thing that can foul a plug. It's hard for them to understand that that little spark can only ignite so much fuel.
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