The Forestry Forum

General Forestry => Chainsaws => Topic started by: weimedog on April 07, 2016, 09:43:42 AM

Title: Whats an Open Port Cylinder & Whats a Clam Shell?? Video explanation for Newbies
Post by: weimedog on April 07, 2016, 09:43:42 AM
Some saw terminology...because I get a pile of messages on this topic!


https://www.youtube.com/watch?v=F_Wm5fpvZF4&ebc=ANyPxKo8Vhxh9cBYO55A0HpJO2To8-XoBuv4iBqEDFD0NpQsKlFPDfgpjFg-P-PuHYLvyJ5TfGsePiM94LLC2gbxV-W1rmIhMw
Title: Re: Whats an Open Port Cylinder & Whats a Clam Shell?? Video explanation for Newbies
Post by: Caloren on April 07, 2016, 11:47:41 AM
Thank you for this video, I now understand a lot better about open and closed port, as well as other aspects of cylinder design.
Title: Re: Whats an Open Port Cylinder & Whats a Clam Shell?? Video explanation for Newbies
Post by: Ljohnsaw on April 07, 2016, 12:42:53 PM
Thanks!  Now I know how much I never knew! :-\  Very interesting.
Title: Re: Whats an Open Port Cylinder & Whats a Clam Shell?? Video explanation for Newbies
Post by: RIDE-RED 350r on April 07, 2016, 04:04:00 PM
Good vid!!

Now, I'm sure I am taking my obligatory shots at a long dead horse.. But I wonder why some saws are of the open port design?? Is it purely a manufacturing cost thing?
Title: Re: Whats an Open Port Cylinder & Whats a Clam Shell?? Video explanation for Newbies
Post by: woodsdog2015 on April 07, 2016, 04:40:57 PM
This is good information.  Thanks.
Title: Re: Whats an Open Port Cylinder & Whats a Clam Shell?? Video explanation for Newbies
Post by: ladylake on April 07, 2016, 05:28:01 PM
Quote from: RIDE-RED 350r on April 07, 2016, 04:04:00 PM
Good vid!!

Now, I'm sure I am taking my obligatory shots at a long dead horse.. But I wonder why some saws are of the open port design?? Is it purely a manufacturing cost thing?

Yes it's a cost thing, open ports are cheaper to make, most closed port 50cc  saws cut faster than 55 to 60cc open port saws,  the one exception would be a Dolmor 6400 which has huge open ports and cuts good for 64 cc.  Steve