Power in the Ports! Cylinder Porting Big Gains

Showing what goes into grinding a cylinder.

for more porting / service visit the website

[richardflagg]

Excellent Video!!! That flexible pen light is the bee knees.

[IndianaDoug]

Ahhhh, a rare glance of the secret porting station, where the wizardry happens🧐

[Super-Dave-Outdoors]

Thanks Joe! I would really like a better understanding of how altering ports and durations tailors power characteristics for torque/RPM/narrow powerband/wide powerband/etc.

[jordanmarg]

Ive always wanted to see a video where you test a saw at all the stages of porting so people can see what each step gets for gains.

Full Stock, stock + Muff mod; stock + muff mod + base gasket delete; muff mod + base delete + lower transfers opened; then a final test of muff mod + base delete + full port job

[homopit]

Yes, Zenoah 50cc clones! I acquired 2 cylinders of 45mm bore, plus the one on my Alpina saw. Cyilinders have open single port on each side.
I measured timing numbers for all of them. Thank you for your tutorial on using that digital angle meter!
And now I'm scratching my head what to do with them. Numbers on one cylinder: EX: 105, TX:128, IN:72. Second cylinder: Ex:98, TX;124, IN:80. The one on the saw: EX:112, TX:132, IN:67. The saw doesn't rev high, but it does keep around 8 to 9k rpm in the cut with 18" bar. I don't need a longer bar, but I would like it get to the power a little higher in the rpm range.
My first step with this saw will be to swap and try each of those cylinders, and see how the saw cuts with different port numbers.

[matthewotis]

Healthy bump in power. Like 25 percent more power. Awesome man. Thanks for sharing.

[BillsGarageWorks]

Awesome work. I would love to see high contrast comparisons. Also would be really nice to see how you clean the cylinder and bottom end before reassembly!

[wayneharper]

Fantastic work, thanks for showing the before and afters, i learn quite a bit from those

[onemantwohands]

Mate thanks for this excellent video 😊 you’re literally a human 29 axis milling machine lol 😂 I’ve ported heads and barrels in my garage for 30 years and you still show me so much more ! Thanks 🙏

[DaveyBlue]

I like that backhand grip on that handpiece I’m going to try that on one… interesting technique there!!! 😉👍

[zack]

Nicely done video after my first time giving it a shot it seems like laying everything out is a big part of being successful. Your recent series on the process has been really helpful saving for my next attempt at porting.

[reillystsb]

Nicely done I love doing 395 XP cylinders they make a ton of

[DaveyBlue]

I cut some length off those long shaft burrs too… so you have some length but less chatter… those longer shaft burrs last pretty good for their price point…

I like the little light through your plug hole idea there…👍😁

[diegovd]

Thank you for showing your craft and results. Amazing

[Szczyrczek]

I know I might be late, but I would like to see simple man port bulid, so I think every one can grind on exhaust, intake, lower transfer, and probably find someone to cut the base(not likely a squishband), and see how the results goes. I gonna give a shoot these upper transfers one more time LoL
I would love to see that grunt saw build, 50cc torque monster that would be so cool!
As always, thanks for sharing tips and tricks :)

[e]

Nice video! I have to get one of those pen lights, a modified Christmas tree light has worked but one must be mindful of the wire :). A Stihl MS462 built for pulling a 28" & 32" in Hardwoods. Duel port vs. Larger single port comparison on a 461 & 462.

[metall]

Great video! You are truly an artist with the die grinders! ⛓️🪚 🧰✍🏼🔎⚙️ 👨🏻‍🔧👨🏻‍🏭 👏🏼

[jackpinesavageadventures]

Another great video !! Keep up the good work Joe !!! 👍👏

[Catman-nm]

Love to see a Professional at Work!! Amazing what they teach you guys in dental school L O L!

[JohnDoe-fpmn]

Would like to see you work on open port cylinder like on a 61. See how to better shape the transfers on one of those suckers.😁