Autotune saws and fuel quality

[Stihlvarna]

I have never noticed a difference between 87 and 91 in a saw

 

[NorthcentralYooper]

I can't get non E fuels or have never seen it around here. Wish I could. Do they have it at the pumps?

Well I live in the snowmobile capital so Non E premium 91 octane is everywhere up here. Most Snowmobiles require 91 or higher. Some are over 200 hp

 

[NorthcentralYooper]

I have never noticed a difference between 87 and 91 in a saw

For me it's the extra detonation protection that it gives .

 

[NorthcentralYooper]

This is a great read.

http://www.madsens1.com/saw_fuelmix.htm

 

[jake wells]

i use 87 E85 they cut faster with it.

 

[mdavlee]

For me it's the extra detonation protection that it gives .

I use 87 with saws that have 240 lbs of compression.

 

[NorthcentralYooper]

I use 87 with saws that have 240 lbs of compression.

Wouldn't the saw diesel at 240 psi

 

[mdavlee]

Wouldn't the saw diesel at 240 psi

Nope

 

[jake wells]

i use 87 E0 from the farmers CO-OP my 545 and 365 likes it fine.
husqvarna said use the minimum of 87 so i use it.

 

[NorthcentralYooper]

Nope

Well I suppose you can tune a saw for any fuel

 

[Stihlvarna]

This is a great read.

http://www.madsens1.com/saw_fuelmix.htm

Thanks that was a great read, but all I have around my area is e15 which states "do not use"

 

[mdavlee]

Well I suppose you can tune a saw for any fuel

The higher the octane the slower they got. 110 was 10% slower than 93. I need to do a good test with 87 and the VP 94 I have.

 

[NorthcentralYooper]

I'd like to hear about the results, have you tried advancing the timing with the higher octane? I know on a 2 stroke race sled it works

 

[mdavlee]

Yes some were advanced half the key with around 220 lbs of compression. There's just not enough time on these short stroke engines for it to work.

 

[NorthcentralYooper]

Yea that makes sense , I can't imagine 93 octane would be all that noticeably slower. I'm just guessing but I'm thinking under 95 octane would be great for most saws

 

[Moparmyway]

The higher the octane the slower they got. 110 was 10% slower than 93. I need to do a good test with 87 and the VP 94 I have.

Even if the VP ends up being slower, its really the only option I got if I dont want ethanol.

I could allways distill the ethanol out, but it wouldn't smell as nice, or stay good as long

 

[mdavlee]

True. I just bought VP fuel to use as storage and try it out in a few saws. Got maybe 2 gallons left. Need to drain and refill my weed eater with it.

 

[NorthcentralYooper]

True. I just bought VP fuel to use as storage and try it out in a few saws. Got maybe 2 gallons left. Need to drain and refill my weed eater with it.

VP makes a really good fuel, a friend of mine is a dealer and has been bugging me to Try it. Its suppose to burn real clean and last 2 years In a sealed can

 

[Moparmyway]

VP makes a really good fuel, a friend of mine is a dealer and has been bugging me to Try it. Its suppose to burn real clean and last 2 years In a sealed can

I got a few things that have had VP in their tanks for better than 2 years. I started 3 of them this past weekend and they started and ran just fine. Popped the fuel cap and couldn't smell anything but VP, nothing going stale or turning yet

 

[NorthcentralYooper]

I got a few things that have had VP in their tanks for better than 2 years. I started 3 of them this past weekend and they started and ran just fine. Popped the fuel cap and couldn't smell anything but VP, nothing going stale or turning yet