I just built a 55 rancher, stock open port cylinder stock carb 205 psi static compression 108⁰ exaust and wide.... widened the intake no timing changes other than the base cut. It will tie with my stock 620 pw Echo with a 20" 3/8 pitch bar and chain in a seasoned 20" piece of wild cherry, i'm a big fan of compression and flow over high exaust roofs in a firewood saw.
HEY SMITTY, YOU CAN ALSO INCREASE COMPRESSION ON A FLAT TOP PISTON BY DRILLING SHALLOW "SPEED OF AIR" HOLE PATTERNS IN THE TOP. WORKED REALLY WELL IN MY OLD 394, AND MY 72CC 61...SEE: "SPEED OF AIR DIESEL PISTONS" ALL BASED ON THE "WATER HAMMER" DESIGN.
It’s really not hard. Just use sticky backed sandpaper and stick it to the top of the piston. Use a drill to spin the piston slowly. Clean it very often with soap and water during the process. The super fine shavings are not gentle on the piston and cylinder.
😊😊 U need 2 take a wire brush and clean the file out they do stop ✋️ 😮 up W filings then they won't sharpen a chain the same way and when there is no teeth left onthe file they won't sharpen nothing either including butter 😮😮 OMG 1 1 25
I just built a 55 rancher, stock open port cylinder stock carb 205 psi static compression 108⁰ exaust and wide.... widened the intake no timing changes other than the base cut. It will tie with my stock 620 pw Echo with a 20" 3/8 pitch bar and chain in a seasoned 20" piece of wild cherry, i'm a big fan of compression and flow over high exaust roofs in a firewood saw.
Happy New Year to Ya 👍👍
Good to see progress on the 61.
Looking forward to seeing it in some wood.
Coming right long bud
👍👍 good stuff! Happy New Year!
365 piston is what I use in 61s but I cut all the clearance from the band
HEY SMITTY, YOU CAN ALSO INCREASE COMPRESSION ON A FLAT TOP PISTON BY DRILLING SHALLOW "SPEED OF AIR" HOLE PATTERNS IN THE TOP. WORKED REALLY WELL IN MY OLD 394, AND MY 72CC 61...SEE: "SPEED OF AIR DIESEL PISTONS" ALL BASED ON THE "WATER HAMMER" DESIGN.
interesting
Hey Smitty, could you show how you cut the chamber with a piston, please? I'm interested to see how that's done.
It’s really not hard. Just use sticky backed sandpaper and stick it to the top of the piston. Use a drill to spin the piston slowly. Clean it very often with soap and water during the process. The super fine shavings are not gentle on the piston and cylinder.
that saw has cut a lot of wood
😊😊 U need 2 take a wire brush and clean the file out they do stop ✋️ 😮 up W filings then they won't sharpen a chain the same way and when there is no teeth left onthe file they won't sharpen nothing either including butter 😮😮 OMG 1 1 25
Great video, man will a 440 carb fit it?
I don’t know. I don’t have one handy to check
@@Smittyschainsaws a 272 carb and carb block works nicely the 272 block has a more open throat than the 61