Guess this piston

[bitzer]

Hey Brad, after this post I'm thinkin of puttin windows into a Stihl 310 piston. The exhasut and intake are already opened and there is little that can be done with the transfers. I'm thinkin windows will get me a little more flow that I'm after. What did you use to open? I'm thinkin drill press to start then dremel snake from there. What do you think?

 

[blsnelling]

Hey Brad, after this post I'm thinkin of puttin windows into a Stihl 310 piston. The exhasut and intake are already opened and there is little that can be done with the transfers. I'm thinkin windows will get me a little more flow that I'm after. What did you use to open? I'm thinkin drill press to start then dremel snake from there. What do you think?

I used a 1/4" carbide burr in my Dremel.

 

[bitzer]

Thanks for the quick reply. I can't stop messing with saws now! I may have to take a vacation away from AS so I can get some work done! Oh well the boss is happy with the amount of wood on the ground so what the hell. Thanks again.

 

[Guarddog1]

I have a Husky 55 I am porting now it is open transfers I have an oem jug ordered a Meteor piston. I am going to open the transfers at the bottom then match them to the crankcase try to bring the top out to round it off tword the cylinder and taper the top 6.5 mm back tword the intake. The take .010 off the base of the jug to make squish .018 then raise the exhaust up the .028 that will be removed (gasket + machine work) and leave the intake at that height widen both ports to about 65-70%. Do you think this saw would benefit from cutting windows in the piston the simple weight reduction I believe would be huge but would the ports help any.

 

[TRI955]

just subscribing...

 

[mt.stalker]

just subscribing...

yup

 

[blsnelling]

Just port yours 100, 120, 80 and see what you think. Leave the piston stock. Then, if you want, go back in and window it, raise the cylinder walls flush with the base and see if it improves. A windowed piston is not required for a good runner.

 

[Dennis Cahoon]

"I was not able to run the same chain on both bars"......"It's hard to say where most of the gains came from".

Maybe it was one dull chain that gave you the results.......Hahahahahaha!.........."Haters are the motivators"

BTW.....take a look at a good 2100 race cylinder sometime.

 

[nenicu]

Hy to all . What do you guys think about the design of the Echo 600p: high transfer openings and non windowed piston. The owners on this site and even Mastermind and Brad said the saw is very good, lots of torqe for pulling big bars. Is anybody tryed that in a 372?

 

[Chainsaw Jim]

Hy to all . What do you guys think about the design of the Echo 600p: high transfer openings and non windowed piston. The owners on this site and even Mastermind and Brad said the saw is very good, lots of torqe for pulling big bars. Is anybody tryed that in a 372?

That would be like putting a Datsun motor in a corvette.