What oil is best? and what ratio?

[dall]

timing advance and compressing the air such as turbo or super chargers is the reason for higher octane even the timing advance on the saws dont amount to much in degree advance

 

[junkman]

appreciate that. But already bought em and just about everything else! ugh.

You have not lived till you tried this stuff

 

[KenJax Tree]

I've used that....it works

 

[jmssaws]

[QUOT9E="jmssaws, post: 150071, member: 291"]They loose there snap with race gas.
If it'd not the octane doing it then something else is.
I'm absolutely positive that testing gas and oil your results will vary from saw to saw. Even two of the same saws will be different, I don't see how a test in one saw can mean much across the board.

Not with race gas suitable for a two stroke.[/QUOTE]
The gas station I and I'm gonna say most buy gas at doesn't have a pump with high octane 2 stroke gas. What they do have is high octane for a car and it runs worse than the lower,even if it has nothing to do with the octane rating there is something else in it that makes it run worse.
I have no doubt that there is a high octane gas that would run great but my station don't sell it.
I buy gas at a vp racing fuels station and they have 87 89 91 93 98 105 110 and trust me when I say I've tried all of it and 87 to 93 run the same as far as I can tell but the others do not. I'm not blaming the octane rating but there is something that makes it run poor. So that's why I say 87 runs better than 105 octane. I don't know what to call a different grade of gas other than the octane number.

 

[mdavlee]

Higher octane is likely best used on saws that have been modded with upped compression and advanced timing , I would think running regular would be a detonation risk .

I use the Shell V power because it's the only E free fuel I can get and the saw runs fine with it .

I run 87 in pretty much everything that runs regularly. I have some VP 94 SEF fuel. I used it some but in every saw it was slower than 87 by a little. 5% or less in cut times. Cookies or milling cuts were both used. It was faster than 89 and 93 wit all 3 grades from the same station on consecutive days. Some of these have well over 200 lbs of compression and a couple were over 230.

 

[jmssaws]

Anybody tried E85 yet? My brother runs it in his Chevy powered turbo Mustang.
I believe it's 105 octane,alcohol is 150+
I think.
That's why a alcohol car is 15:1 or more.

 

[Keith Gandy]

Anybody tried E85 yet? My brother runs it in his Chevy powered turbo Mustang.
I believe it's 105 octane,alcohol is 150+
I think.
That's why a alcohol car is 15:1 or more.

Wonder what the compression ratio is on one of your high compression 066s?

 

[jmssaws]

Wonder what the compression ratio is on one of your high compression 066s?

Not very high I figure,the highest compression saw I own now is less than 200lbs. My old 066 was 240lb and it did run better on 93 because it needed it,like I said before, run the lowest octane you can run without detonation. I don't think a saw will detonate under normal conditions.

 

[Lightning Performance]

Anybody tried E85 yet? My brother runs it in his Chevy powered turbo Mustang.
I believe it's 105 octane,alcohol is 150+
I think.
That's why a alcohol car is 15:1 or more.

Try 17-1 on 115*gas and you need the Oxy and whatever else they add. When Davey pulled the coil wire it didn't know the difference lol. Shutting down the pumps to kill the engine says, "we're living on the edge!" Damn. that car leaves hard

I don't think work saws will ever see that kind of dwell time or internal heat to need race fuels. The piston will turn to fuel first.

 

[Cut4fun]

Anybody tried E85 yet? My brother runs it in his Chevy powered turbo Mustang.
I believe it's 105 octane,alcohol is 150+
I think.
That's why a alcohol car is 15:1 or more.

EHP = Ed has.

 

[jmssaws]

EHP = Ed has.

?

 

[Cut4fun]

?

?

 

[Cut4fun]

From a thread on my site. He also has other stuff posted about using e85 on his site.

Just what he has to say about it and the Canada gases.

[quote author=EHP link=topic=4980.msg60152#msg60152 date=1438733735]
OK this is just me ok, On my autotune saws I much prefer the 10% ethanol high test gas over non ethanol gas , reason is if you take a saw that runs a carb and set it at as close to perfect for max power that you can then switch to gas with ethanol in it you will find the ethanol fuel burns abit leaner than non ethanol gas , In the autotune saws that run in my air they all run rich so the ethanol gas helps make them run leaner . If you are only after horsepower and given the choice of high test non ethanol pump gas or E85 fuel , No contest the E85 produces alot more power but you have to do lots of carb work to pump enough fuel to the motor , Its about half way between gas and 12026 alcohol/nitro fuel as far as the amount of fuel you need to burn to make power
[/quote]

 

[bwalker]

Not with race gas suitable for a two stroke.

The gas station I and I'm gonna say most buy gas at doesn't have a pump with high octane 2 stroke gas. What they do have is high octane for a car and it runs worse than the lower,even if it has nothing to do with the octane rating there is something else in it that makes it run worse.
I have no doubt that there is a high octane gas that would run great but my station don't sell it.
I buy gas at a vp racing fuels station and they have 87 89 91 93 98 105 110 and trust me when I say I've tried all of it and 87 to 93 run the same as far as I can tell but the others do not. I'm not blaming the octane rating but there is something that makes it run poor. So that's why I say 87 runs better than 105 octane. I don't know what to call a different grade of gas other than the octane number.[/QUOTE]
Most anytging you buy at the pump has a distillation curve suited to v8 fourstrokes with long intake runners. This stuff sucks in a two stroke.
The good two cycle fuels by VP are doped up with MTBE/ETBE and will actually make quit a bit more power as well as run much crisper ND cleaner.

 

[bwalker]

Ethanol doped fuel will make more power. Unfortunately it's other properties suck.

 

[bwalker]

Not very high I figure,the highest compression saw I own now is less than 200lbs. My old 066 was 240lb and it did run better on 93 because it needed it,like I said before, run the lowest octane you can run without detonation. I don't think a saw will detonate under normal conditions.

He said compression ratio. Have you actually figured out the compression ratios for the saws you build?

 

[Keith Gandy]

Ben what would be a wild guess on static / trapped on a large bore 066? Im just guessing tops MAYBE 9:1??

 

[KenJax Tree]

I liked the Vp T4 when i used it.

 

[mdavlee]

Ben what would be a wild guess on static / trapped on a large bore 066? Im just guessing tops MAYBE 9:1??

I think tree monkey figured some in the 8-8.5:1

 

[Keith Gandy]

I think tree monkey figured some in the 8-8.5:1

No need for high octane there?