Saw video thread

[94BULLITT]

I think this thing can go 10 pin with racing fuel. I'll have to pick some up so I can try it out. This is with a 3/8 9 pin in 22" wood. It's still not the chain speed I'm after, but there are still other carbs I want to try out and a pipe I want to have made.
It's currently running a 372xp carb.

It is really cool to see an old saw cut that good

 

[Chainsaw Jim]

Be careful on what fuel you get. Some will corrode really really bad if you don't flush the system as soon as your done running it. I seen it happen. I race drag bikes and there's people buying the fancy race fuel for a few more hp but are constantly flushing out the system when they're done.

Yeah I'm not trying to cause any problems. I will definitely be flushing the system and running immediately after anything non petroleum based if I try it. At this point the seals are my main concern as I've already converted the fuel lines to silicone in case I dabble with nitromethane. I found some orange color lines to match the saw color. Lol
I'm thinking my compression is almost high enough to go with some 110 octane, but I'm only going to mix it in to raise the octane to the point of the most gain until I cut the head off the cylinder to bump the compression up to about 250psi to run straight 110.

 

[Chris Zautner]

Yeah I'm not trying to cause any problems. At this point the seals are my main concern as I've already converted the fuel lines to silicone in case I dabble with nitromethane. I found some orange color lines to match the saw color. Lol
I'm thinking my compression is almost high enough to go with some 110 octane, but I'm only going to mix it in to raise the octane to the point of the most gain until I cut the head off the cylinder to bump the compression up to about 250psi to run straight 110.

I run c-12 which is 108 in my drag bike and it has a 16 to 1 compression ratio. I tried c-14 which I think is 114 and it slowed my bike down. You said you want to try some nitro. You need lots of compression for it. I recommend a product called nitro propane. It's a fuel additive. Makes a difference in saws. Can't try it in my drag bike nor would I ever. It's illegal to run in division 1 drag racing.

 

[Chris Zautner]

Yeah I'm not trying to cause any problems. I will definitely be flushing the system and running immediately after anything non petroleum based if I try it. At this point the seals are my main concern as I've already converted the fuel lines to silicone in case I dabble with nitromethane. I found some orange color lines to match the saw color. Lol
I'm thinking my compression is almost high enough to go with some 110 octane, but I'm only going to mix it in to raise the octane to the point of the most gain until I cut the head off the cylinder to bump the compression up to about 250psi to run straight 110.

Here's a really good informational link for VP race fuels http://www.vpracingfuels.com/vp-drag-racing

 

[Chris Zautner]

Be careful with the oxygenated fuel blends as they are corrosive.

 

[jake wells]

Yeah I'm not trying to cause any problems. I will definitely be flushing the system and running immediately after anything non petroleum based if I try it. At this point the seals are my main concern as I've already converted the fuel lines to silicone in case I dabble with nitromethane. I found some orange color lines to match the saw color. Lol
I'm thinking my compression is almost high enough to go with some 110 octane, but I'm only going to mix it in to raise the octane to the point of the most gain until I cut the head off the cylinder to bump the compression up to about 250psi to run straight 110.

you got a small airport near by? see if you can get some 100 or 110 low lead it wont harm your fuel system and can last 5-10 years in good storage.

 

[MustangMike]

If you don't have a "race saw", the canned mix lasts a long time also. I may leave a saw up at my cabin with some "canned mix".

 

[Chainsaw Jim]

I run c-12 which is 108 in my drag bike and it has a 16 to 1 compression ratio. I tried c-14 which I think is 114 and it slowed my bike down. You said you want to try some nitro. You need lots of compression for it. I recommend a product called nitro propane. It's a fuel additive. Makes a difference in saws. Can't try it in my drag bike nor would I ever. It's illegal to run in division 1 drag racing.

I've been being told you want less compression for nitro or it'll diesel fire and continue running without spark. and you want higher compression for higher octane to allow the higher octane to convert into power instead of just burning off.

 

[Chris Zautner]

I've been being told you want less compression for nitro or it'll diesel fire and continue running without spark. and you want higher compression for higher octane to allow the higher octane to convert into the power instead of just burning off.

Your probably right for nitro. And yes you need more compression for higher octane. I have been told high compression for nitro. But it doesn't matter to me as I have no interest in running it anytime soon.

 

[MustangMike]

The higher the ratio of oil in the mix, the more they dilute the octane rating (but it may increase compression).

 

[jake wells]

the local oil company has old stock quart bottles of tetra ethyl lead i might buy a quart to see how it works for octane boost, he told me it takes 87 to 95 with just 1 once per gallon.

 

[Chainsaw Jim]

you got a small airport near by? see if you can get some 100 or 110 low lead it wont harm your fuel system and can last 5-10 years in good storage.

There is a solvent/fuel supply facility where they sell drums of racing fuel and will fill your one gallon can.
This is from their brochure...

 

[Chris Zautner]

There is a solvent/fuel supply facility where they sell drums of racing fuel and will fill your one gallon can.
This is from their brochure...
View attachment 28711

What other fuels do they have?

 

[jake wells]

funny you guys are talking compression when i got 2 strokes that spec 100psi and make 4hp at 3200 rpms lol.

 

[Chainsaw Jim]

What other fuels do they have?

Here's a pic of the list..

 

[Chainsaw Jim]

funny you guys are talking compression when i got 2 strokes that spec 100psi and make 4hp at 3200 rpms lol.

Are you talking direct drive? Or gear reduction?

 

[jake wells]

Are you talking direct drive? Or gear reduction?

direct drive.

 

[Brewz]

Ran the 2100 in some dead hard black butt today. It is nasty hard and made the 372 and 268 I tested in it earlier in the week struggle and stall if leaned on at all.
30: bar running 404 semi chisel.

It tuned at 12000 RPM and I am thinking it may have a bit more torque backed off with a touch more fuel at about 11500
Also going to take a touch more off the exhaust and intake

 

[drf256]

Ran two 661s side by side to compare. One has 5* less blowdown.

John,

Both saws look great. The more blowdown saw looks like it's got more balls to me.

How do you feel about it?

 

[Chainsaw Jim]

direct drive.

I guess it doesn't matter anyways since the compression topic was about necessary psi levels the different fuels favor for optimum power.