|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
10-22-2015, 01:45 PM | #41 |
Senior Member
Join Date: Jul 2010
Posts: 2,593
|
Re: Four ring pistons
All of the four ring style pistons I've dealt with are cam ground. These are all NOS or NORS.
The fourth ring does nothing to stabilize the piston skirt, the ring is free to float in the ring land. I'd still leave it out. With a nice honed bore and your cast rings, you'll not have any need for the fourth ring. Martin. |
10-23-2015, 06:17 AM | #42 |
Senior Member
Join Date: May 2010
Location: Long Island, NY
Posts: 1,052
|
Re: Four ring pistons
Just to keep the record straight here I had the chance to check after I posted about the OEM pistons being "cam-ground" and they are definitely done on a cam profile. I wasn't able to check during the day!
Thanks, Gary in N.Y. P.S. Having established that fact I would stand by my post and use the 4th ring. It isn't something we've tested and if we did choose to leave it out we would most likely remove that section of the piston. I would say this issue would most likely be a customer choice.
__________________
http://www.stromberg-bulletin.com/me...berg-equipped/ |
Sponsored Links (Register now to hide all advertisements) |
|
10-23-2015, 11:31 AM | #43 | |
Senior Member
Join Date: May 2010
Location: Santee, California
Posts: 3,505
|
Re: Four ring pistons
Quote:
|
|
10-23-2015, 11:48 AM | #44 |
Member
Join Date: Jan 2011
Posts: 78
|
Re: Four ring pistons
|
10-23-2015, 02:15 PM | #45 |
Senior Member
Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 10,259
|
Re: Four ring pistons
Harry and Russ, Just curious, have either one of you built and engine without the fourth ring? My concern here is not so much reduced friction, but that the top rings may be compromised by "too good" oil control caused by modern rings and bore finishes as reported by others here.
|
10-23-2015, 09:58 PM | #46 |
Senior Member
Join Date: May 2010
Location: Santee, California
Posts: 3,505
|
Re: Four ring pistons
Sponsored Links (Register now to hide all advertisements)
|
Thread Tools | |
Display Modes | |
|
|
Sponsored Links (Register now to hide all advertisements) |
|