The Ford Barn

Mart · 11-02-2012, 12:45 PM

Thanks for all the ring tech, guys, a lot more to it than I'd ever dreamt. I don't build a lot of engines, but do set the gaps apart when I do. It's no hardship, I'll keep on doing it, whether it's necessary or not.

Mart.

Ol' Ron · 11-02-2012, 05:01 PM

Very interesting

cmbrucew · 11-03-2012, 09:58 PM

I seem to remember motorcycle pistons having holes for pins to locate the rings.
I believe they were an off shore make bike.
Bruce

Works good
Lasts long time

Ross in East Texas · 11-04-2012, 07:51 AM

Many large industrial 2 cycle engines (10"-12" bore or larger) have doweled piston rings to prevent the rings from rotating. This keeps the ring end gaps passing over the webs between the ports to prevent ring clipping and port wear.

Ronnie · 11-04-2012, 09:32 AM

Many specific sets are done this way to prevent rotation.Referred to as pin mill rings.

11-02-2012, 12:45 PM	#21
Mart Senior Member Join Date: May 2010 Location: Solihull, England. Posts: 8,770	Re: Piston ring spacing Thanks for all the ring tech, guys, a lot more to it than I'd ever dreamt. I don't build a lot of engines, but do set the gaps apart when I do. It's no hardship, I'll keep on doing it, whether it's necessary or not. Mart.

11-02-2012, 05:01 PM	#22
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,884	Re: Piston ring spacing Very interesting

11-03-2012, 09:58 PM	#23
cmbrucew Senior Member Join Date: Dec 2010 Location: North of sandy ago, CA. Posts: 2,064	Re: Piston ring spacing I seem to remember motorcycle pistons having holes for pins to locate the rings. I believe they were an off shore make bike. Bruce Works good Lasts long time

11-04-2012, 07:51 AM	#24
Ross in East Texas Senior Member Join Date: May 2010 Location: Longview, Texas Posts: 282	Re: Piston ring spacing Many large industrial 2 cycle engines (10"-12" bore or larger) have doweled piston rings to prevent the rings from rotating. This keeps the ring end gaps passing over the webs between the ports to prevent ring clipping and port wear. __________________ Ross Murphy 1939 Ford Standard Coupe