i was looking at some amsoil 2 cycle pre mix oils and it recommends 50:1 ratio isnt that more rich than the 32:1
pre mix oil
- Thread starter Blaster 01
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thats actually leaner than 32:1 i reccommend 32:1 to stay lubed properly the higher the first number the better performance you will get but the less you will have oil so it will burn hotter and be rougher on the engine. 32:1 seems to be about the sweet spot
yes thats the same oil ken runs,
and i didnt even know this place, or ken oconnor even existed back when i ran super m in my '96, from day 1 till and sold it 8 years later with the stock piston in it, and still good compression and firing in 1-2 kicks everytime
my recent experimentation with amsoil and klotz was directly related to info on here, but back to where i started, and will finish, with super m
nooooooooo benol!!!! hahaha that stuff is nasty sticky!!! smells awesome though... lol
don't the whats there in the us but i use Rock oil all the time and never had any problems with my engine never be'n rebuilt
Hmmm, I feel an argument coming on....Blaster01 is right guys. Fifty parts of fuel to one part of oil is definitely a richer mixture than 32:1. After all, it is the gas you are burning to make power, the oil is just going along for the ride, so to speak.
Having just seized a rod due to what I believe was poor oil choice (got cheap and paid the price!) I'm inclined to take a manufacturer's word on what ratio to run with their oil. That said, I'm still a cheap bastard and I'm leaning towards AMSOIL Interceptor which I can get for 35 a gallon as opposed to Maxima which was costing 20 bucks a QUART. My local guy runs the stuff at 40:1 (and even 50:1 is fine) in everything with no problems. He told me I was crazy to run 32:1 anyway, a total waste of oil.
Ya know, if you think about it, it is possible that a lot of us are actually running lean (fuel-wise) to keep a clean plug that we may be fouling with too much oil in the mix!
when talking about pre mix, 50:1 is leaner than 32:1 in terms of premix. but when you run a leaner premix than before, your a/f ratio because richer.
and for air cooled, you running 32:1 because of the cooling properties that oil has.
liquid cooled motors can run 40:1 and 50:1 because they dont need the oil to keep the motor cool.
and for air cooled, you running 32:1 because of the cooling properties that oil has.
liquid cooled motors can run 40:1 and 50:1 because they dont need the oil to keep the motor cool.
$20 bucks a quart for Maxima? I just got half a gallon for $23 last night. I would loom around on that price man.
Interesting argument Shee, but lean/rich refers to the fuel, not the oil. And having a good air/fuel ratio (read jetting) is what is going to keep an engine cool. Whether you want to talk about combustion temp (mixture) or the effect of latent heat of evaporation, extra fuel is what keeps an engine cool.
Oil lubricates---that's pretty much it. Certainly it helps a "little", but not even in the same ballpark as the effect of fuel. Now circulate some oil in a sump or better yet through a cooler and you have a better argument.
there is not argument, i am correct.
oil is use to cool engines.
oil is used to reduce the heat from friction, ie it is keeping it cool.
also some engines use oil to keep the piston cool. all 2 strokes do this. some engine actual have oil the is "injected" into the piston to keep it cool. some "squrt" oil onto the underside of the piston to keep it cool.
and lean/rich refers to any type of mixture. be it the amount of sugar you put into a bowl of cereal in the morning. you just need to give it units like a lean premix ratio, or a rich sugar content.
shee, you are wrong.
Reduced friction is a by-product of keeping things from locking up.
The phase change of the fuel is the primary cooling mechanism not the oil. As a matter of fact, the oil drops out of suspension as soon as it hits the crank case...
Oil is sprayed onto the bottom of certain pistons to be able to access the wrist pin bearing on engines without intake windows cut into the piston.
You are right about "when you run a leaner premix than before, your a/f ratio because (sp?) richer" I will agree with that part of your statement. You're playing word games with the rest of it.
The reason air cooled engines need more oil than liquid cooled engines has nothing to do with needing oil to keep the engine cool. Actually, the engine being cooler allows a liquid cooled engine to run less oil. There are five things that HAVE to have oil in a 2 stroke engine; the main bearings, the crank seals, the wrist pin (or little end bearing), the crank bearing (or big end bearing), and the piston to cylinder wall surfaces. Liquid cooled engines pass heat away from the piston crown more efficiently than air cooled engine requiring less oil for the piston and cylinder wall surfaces.
The moral of the story is, find a premix ratio that works for you. 32:1 for most oils, 50:1 for some others and STICK WITH IT. Then adjust your carburetor jetting to get the proper AFR. You should never adjust your oil mixing ratio to adjust your engine tune.
Reduced friction is a by-product of keeping things from locking up.
The phase change of the fuel is the primary cooling mechanism not the oil. As a matter of fact, the oil drops out of suspension as soon as it hits the crank case...
Oil is sprayed onto the bottom of certain pistons to be able to access the wrist pin bearing on engines without intake windows cut into the piston.
You are right about "when you run a leaner premix than before, your a/f ratio because (sp?) richer" I will agree with that part of your statement. You're playing word games with the rest of it.
The reason air cooled engines need more oil than liquid cooled engines has nothing to do with needing oil to keep the engine cool. Actually, the engine being cooler allows a liquid cooled engine to run less oil. There are five things that HAVE to have oil in a 2 stroke engine; the main bearings, the crank seals, the wrist pin (or little end bearing), the crank bearing (or big end bearing), and the piston to cylinder wall surfaces. Liquid cooled engines pass heat away from the piston crown more efficiently than air cooled engine requiring less oil for the piston and cylinder wall surfaces.
The moral of the story is, find a premix ratio that works for you. 32:1 for most oils, 50:1 for some others and STICK WITH IT. Then adjust your carburetor jetting to get the proper AFR. You should never adjust your oil mixing ratio to adjust your engine tune.
A cool liquid (oil) can't help but absorb some heat from a hot surface that it comes in contact with, but my point is that fuel evaporation is probably absorbing 100x the heat that the oil is. Plus, cylinder temp is in direct relation to the air-fuel mix, not the oil-whatever mix.
Oil injected at various locations of an engine ( piston pin, etc) is meant to reduce friction due to poor oiling without it. Oil reduces friction and hence heat generation. Cooling is not it's major function, especially in a 2-stroke.
Oil injected at various locations of an engine ( piston pin, etc) is meant to reduce friction due to poor oiling without it. Oil reduces friction and hence heat generation. Cooling is not it's major function, especially in a 2-stroke.
i never said that oil was the number one way to reduce heat. but that oil is used to reduce heat.
and you can run a 2-stroke on straight gas. it will just overheat and piston will expand causing it to either blow up or lock up.
also you say oil is used to keep the motor from locking up, how does it do this?
it does it by reducing the friction on that part which inturns reduces the heat.
less friction = less heat.
why do you think people will drill holes into the side of the piston? to help lube the exhaust bridge, because when the exhaust bridge gets too hot, your engine will blow.
also i dont think this piston is using the oil to lube any part. it is to keep it cool
http://www.emma-maersk.com/gallery/photo/engine_6.jpg
http://www.emma-maersk.com/gallery/photo/engine_7.jpg
read it and shhhhhhh
http://www.blasterforum.com/engine-13/pre-mix-ratios-myth-facts-read-14935/
simply put.. 50:1 will give you a richer JETTING and than 32:1 will.. more oil thickens up the fuel mix so there for gives you a leaner jetting... read the thread i posted and it will make sence
http://www.blasterforum.com/engine-13/pre-mix-ratios-myth-facts-read-14935/
simply put.. 50:1 will give you a richer JETTING and than 32:1 will.. more oil thickens up the fuel mix so there for gives you a leaner jetting... read the thread i posted and it will make sence
