treemonkey stuff

[tree monkey]

you are correct that lowering the cylinder changes the timing on all ports.
i'll do my best to explain stratto's in a latter video.
thanks for the reply

 

[ZERO]

Scott,

Could you at some point explain why you leave your ports rough. I think I know the answer but don't want to be accused of leading the witness. Sad that some said they will not have a saw ported by you because of the rough ports. They just don't see the bigger picture.

This is the other video of yours that I saw in the oil question thread.

Thanks for sharing the wealth of knowledge.

 

[tree monkey]

 

[tree monkey]

Scott,

Could you at some point explain why you leave your ports rough. I think I know the answer but don't want to be accused of leading the witness. Sad that some said they will not have a saw ported by you because of the rough ports. They just don't see the bigger picture.

This is the other video of yours that I saw in the oil question thread.

Thanks for sharing the wealth of knowledge.

i sure can

 

[tree monkey]

 

[gmrahn]

This is my saw, this is about Cool. I thank you for all your help Scott, we are very fortunate to have you...

 

[tree monkey]

i sure can

Scott,

Could you at some point explain why you leave your ports rough. I think I know the answer but don't want to be accused of leading the witness. Sad that some said they will not have a saw ported by you because of the rough ports. They just don't see the bigger picture.

This is the other video of yours that I saw in the oil question thread.

Thanks for sharing the wealth of knowledge.

 

[ZERO]

Scott,

Very nice explanation.

I was thinking intake but never thought about the science of exhaust.

Learned something new today.

 

[tree monkey]

 

[Fabulous]

It looks like that saw will cut up a cord of wood very quickly! I’d venture to guess 35% faster cut (or more) than one off the dealers shelf. More wood cut and job done much quicker. If you were doing firewood on a larger scale or even residential tree work 2 men could just about do the work of 3 as far as the bucking goes. Is that a carb or mtronic version ?

 

[2000ssm6]

Scott, I have read on the fb groups where a builder(s) have ran the 500i's fuel system to it's max output. One guy posted a solution is in the works but didn't mention any details.

Short of building an all out race saw, I'd think the system could provide enough for a work saw.

 

[tree monkey]

It looks like that saw will cut up a cord of wood very quickly! I’d venture to guess 35% faster cut (or more) than one off the dealers shelf. More wood cut and job done much quicker. If you were doing firewood on a larger scale or even residential tree work 2 men could just about do the work of 3 as far as the bucking goes. Is that a carb or mtronic version ?

mtronic, it needs a more aggressive chain

 

[tree monkey]

Scott, I have read on the fb groups where a builder(s) have ran the 500i's fuel system to it's max output. One guy posted a solution is in the works but didn't mention any details.

Short of building an all out race saw, I'd think the system could provide enough for a work saw.

it's very easy to get to the fuel limits on those. i can go a long ways on most mtronic saws with no problems

 

[tree monkey]

 

[tree monkey]

 

[Fabulous]

Interesting … rather than use words a pic might show it better. If stock piston is used and the cylinder was dropped by “x” amount (lathe cut) the cutouts on the piston are going to open the stratos later vs where they opened stock. I’m speculating this most likely won’t make a lick of difference at 10000 rpm in the cut tho I’ve never tried building a stratos in this fashion. Any tips appreciated

 

[huskihl]

Interesting … rather than use words a pic might show it better. If stock piston is used and the cylinder was dropped by “x” amount (lathe cut) the cutouts on the piston are going to open the stratos later vs where they opened stock. View attachment 473471I’m speculating this most likely won’t make a lick of difference at 10000 rpm in the cut tho I’ve never tried building a stratos in this fashion. Any tips appreciated

Stratos open earlier than stock after lathe work, just like the intake. They usually open about the same time, as that’s how it works, fuel and air goes in the bottom and a layer of air is sucked through the strato ports and into the upper transfers. The strato ports are visible through the intake, but they open on the way up when the cut out in the piston reaches the bottom of the upper transfers. Not visible when it happens

 

[Fabulous]

I’m referring to the power-stroke when the piston is being forced in a downward direction. I wonder IF a small hole or tunnel connecting the stratos to the intake might just make a fuzz more powa at “in the cut rpm” - should get a bit more fuel in theory, then again the “theory” can be off by quite a bit when you actually test the saw.

Stratos open earlier that stock after lathe work, just like the intake. They usually open about the same time, as that’s how it works, fuel and air goes in the bottom and a layer of air is sucked through the strato ports and into the upper transfers. The strato ports are visible through the intake, but they open on the way up when the cut out in the piston reaches the bottom of the upper transfers. Not visible when it happens

 

[huskihl]

I’m referring to the power-stroke when the piston is being forced in a downward direction. I wonder IF a small hole or tunnel connecting the stratos to the intake might just make a fuzz more powa at “in the cut rpm” - should get a bit more fuel in theory, then again the “theory” can be off by quite a bit when you actually test the saw.

It would need to be in a spot that wouldn’t affect case compression on the way down and up. Like a finger or boost port

 

[Fabulous]

It would need to be in a spot that wouldn’t affect case compression on the way down and up. Like a finger or boost port

I’ve seen builds where the stratos ports were gutted / divider removed and yes I believe it would increase the output , however the fuel mileage might be unbearable.