Fitting a 272xp piston into a 372xp. Does it work??
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- เผยแพร่เมื่อ 2 พ.ค. 2023
- 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! - ยานยนต์และพาหนะ
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.
10 49 pm that looks like it will b a runner I hv faith in ya it will b awesome I am learning a lot from u thank u for sharing
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.
Piston work only is very interesting! You and Harvey definitely have my attention!
I put a 272 popup piston in a 480cd and it ran really good! Sold it for $700!
Zing zing!!!!! Can't wait to hear this one sing!!!
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
Hey man! Like to see that kind of 372's videos!
Thanks for explaining this stuff. This is awesome video!
Tha 372 is the saw I want to build thanks for these videos!
Can't wait to see this one unfold!!! Awesome video Tinman!!
Hey buddy, thanks so much!!
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
Brilliant, just did a 272 piston in a big bore 372 on my channel. Looking forward to seeing how yours runs!
Interesting as always. Definitely lots to think about. TC Mahalo Tinman🤙🤙🤙
Just found this channel and I love it! The builds and the way you explain technical information is awesome 👍 keep up the good work.
Thabks for the kind words and welcome to the channel!!
Some JB Weld in the intake port can bring that intake timing back.
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.
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 would go with it and see what happens. I've seen some with those numbers that were wicked
Nice video buddy❤❤
Ur talking old school hot rodding 👍cheers
Mint👌💪
💪
A heavy duty belt sander or disc sander with a good guide surface would work to sand the piston crown down with patience
I’d really like to see how that piston works with the stock cylinder. I bet it does surprisingly well but may have idle issues like you where saying.
The 272 Hyway and meteor pistons I used in 372xps should be about .040 taller than stock. Maybe they changed the pistons.
I had the chrome bubble up on my Hiway nikisil 660 cylinder. It had great numbers to. Now I'm not sure about the Hiway cylinders.
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!
Would maybe the intake timing get in the desired numbers with a thicker base gasket?
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 am an OEM guy but I just bought my first highway top end for an MS 440 it was a 💩
No good??
@@cammatney6388 yeah it’s no good. The plating does not go all the way to the top of the cylinder so I cannot cut the base.
Glad I seen this. Was going to get a hyway kit for my 461, but I'll stick with oem.
Love it just do it already 😅😅
Comment from me today
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👍👍👍👍👍😎
what about lifting up the cylinder and matchning the ports to fit with another piston.making thin plate under the cylinder.
That is an option for sure.
yes,that way doesnt need to shave the piston head too mutch.
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?
Question of the day.
Does the crankcase benifit to be scuffed up when porting . Is it part of the runners
Be interesting to try that.
@tinmanssaws does that mean you have never done ?
Or is this a secret ?
Great Video as always, I’ve heard Hyway has a single ring 371/372 piston.
Hey Tinman can I use a wrist pin that is one millimeter shorter than stock
Sure as long as you think the Poston will hold it securely with 1mm less bearing surface.
@Tinman's saws Thanks Tinman!
can you cut the squish band
Can do anything you want, that's the fun of it.
I was thinking that, But cutting squish and lowering cylinder would bring the intake even further down
That's compared to leaving the squish band and leaving or raising cylinder.... Am I on the right track lol 🤔
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.
I'd like to put a 60 mm piston in my Husqvarna 235. Will this fit? (Just checking to see if you read every comment)
No, I don’t have a laeth