Post up your ported cylinder Artwork

[Mattyo]

View attachment 311712

Holy smoke show!!!! Wow!!!

 

[drf256]

View attachment 311712

Amazing. Kudos.

 

[Stump Shot]

An old guy.....a well respected fella, once told me that it makes more difference raising the transfer entrance than lowering it. At that time everyone was cutting the transfer entrance all the way to the base.

+1 with old guy and it also weakens the base to some degree as well when lowering.

 

[huskyboy]

Raising the lowers in the 395 is just copying what they did to the 394 from the factory. It’s pretty obvious when you hold a 394 cylinder next to a 395. As to why they did that?… I’m not sure. Would be interesting to do timed cuts or a dyno test to see the difference. Would save a lot of time grinding if it wasn’t any gain.

 

[Mastermind]

Raising the lowers in the 395 is just copying what they did to the 394 from the factory. It’s pretty obvious when you hold a 394 cylinder next to a 395. As to why they did that?… I’m not sure. Would be interesting to do timed cuts or a dyno test to see the difference. Would save a lot of time grinding if it wasn’t any gain.

Timed cuts have been done.

 

[huskyboy]

Timed cuts have been done.

Do you feel that intake duration (or port timing in general) effects how much the lowers like to be opened?

 

[Maintenance Chief]

Didn't the 394 come out before the 395? How would that be a copy?

 

[Mastermind]

Do you feel that intake duration (or port timing in general) effects how much the lowers like to be opened?

I use conservative numbers.....and they still like to be raised.

 

[huskyboy]

Didn't the 394 come out before the 395? How would that be a copy?

Tying to replicate the 394 lowers on the 395’s. Didn’t mean copy in a bad way. Just my way of thinking.

 

[srcarr52]

I’ve never raised the lowers on a 395.

 

[Nutball]

Professional overthinker's been missing out.

 

[huskyboy]

I’ve never raised the lowers on a 395.

Me neither. I only knocked the lip off the lowers.

 

[NightRogue]

084 nothing fancy
Just a dumb kid from middle of nowhere having fun lol

 

[Slumberjack]

084 nothing fancy
Just a dumb kid from middle of nowhere having fun lol

Know the feeling. Nice work!

 

[Gullet]

I always wondered if CNC milling was possible on cylinders?

 

[Gullet]

You could mill (port) any timing #'s you desire with CNC...

Just curious.

 

[Slumberjack]

You could mill (port) any timing #'s you desire with CNC...

Just curious.

Sounds like a cool idea. If someone had means to do so.

 

[cus_deluxe]

im not a machinist, but i cant really picture a way to do anything meaningful to a chainsaw cylinder via cnc. it would certainly be cool for repeatability but just cant see the tooling aspect being workable.

 

[NightRogue]

im not a machinist, but i cant really picture a way to do anything meaningful to a chainsaw cylinder via cnc. it would certainly be cool for repeatability but just cant see the tooling aspect being workable.

Maybe not with an existing cylinder
But with a fresh block of aluminium and chrome sleeve? Not gonna be cheap but boy the possibilities are endless

 

[NightRogue]

Know the feeling. Nice work!

Porting game so strong....
You run into clutch issues.....