A video showing the ins and outs of swapping pistons in chainsaws. in this video I'll show how to install a 272xp piston into a 372xp. thanks for watching!
I use the 272 piston. It allows me to cut a tapered squish band (13 degress). I don't cut the base at all and lately I have been cutting the cylinder head off and making my own with a cooling fins etc. This has opened up all sorts of possibilities and I far as I can tell a lot more power.
Tinman, I built a 372 with a 268 piston. I had a farmertec cylinder with .060 squish with no base gasket. I put the 268 piston in with a base gasket. The squish is now .019 and it's been ported. It has 82 degrees of intake timing because of the short skirt. It has to idle high to stay running but it's a fast cutting saw.
Recently discovered you through Buckin's channel. So interesting & technical, amazed at the experience coming out. Didnt realize how involved it is with every little modification you choose to make. Simply explained. Thanks
Love these info/ tech detailed videos I’m looking to take my time with a 266 52mm build I’m working on next , start slowly with stock, then transfers, the exhaust and intake timing like the 372 Harvey sent to you. I just didn’t have the patience with my first 266se and grinder everything I could lol. Thanks again brada tinman and see you on the next one
Why would you cut the piston? Stack base gaskets. 3 base gaskets your at about .021 squish. Then check your timing. I ended up with 80,102.5,.022 putting a 268 popup in the stock bore with 3 base gaskets. Cuts fantastic. Did some work on the lower transfers and modded the muffler. You'll probably have too much intake timing if you shave the piston.
I have tig welded a little material on the bottom of the intake skirt and trued it up in the lathe if you don't want to use epoxy in the intake port. May be an option for you here.
The pop up piston from Hyway should have had opening in it at wrist pin. They must make different options the kit I have used had openings. I only used one ring. Are you going to match your cases to cylinder?
I like where your looking to go with this build. Just curious, does the windowed piston hurt case compression? I understand a lighter piston is a benefit, just not sold on the windowed piston. I would like your opinion!
Mesin husqvarna tipe berapa sajah yang parts nya bisa di pakai misalnya 365 bisa pakai sylinder 372 atau 61 268 bisa pakai 272.yang lainya tipe berapa yang sama bos?
Go lite go lite but keep the piston short raised top one ring and turn it in. To gorilla put a 36 “ bar put in on 3 to 4 ft white oak Stump or dad oak land let it rip👍👍👍👍👍😎
As a race 2 stroke engine builder, I can tell you anything beyond .020" squish in a medium RPM ( below 15000 ) saw, and you are giving up torque from compression loss. When you cut the entire piston top, you gave up compression again. Cutting only on the squish band area would had given you the clearance, and created a pop-up into the chamber. The sharp edge could have been rolled over to enhance flow into and out of, the cylinder. The increase of torque from compression , will help the low end response with 160 degree intake.
