To: | <WeslakeMonza1330@aol.com>, <spridgets@autox.team.net> |
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Subject: | Re: [Spridgets] ZDDP |
From: | "Deikis, John G" <John.Deikis@va.gov> |
Date: | Thu, 26 May 2011 17:39:35 -0400 |
My understanding (quite limited) is that ZDDP breaks down into phosphorus and sulfur that provides the extreme pressure protection by adhering to the sliding metal surfaces of the cam-tappet interface. Too much phos and sulfur actually attack the metal and cause eventual degradation. FWIW: the best recent article I've come across that summarizes the issues is on a Corvette site and worth reading. The author avoids a lot of the earlier hysteria and panic that characterized coverage of the topic in the popular press. http://www.corvetteactioncenter.com/tech/oil/index.html Cheers! JohnD From: WeslakeMonza1330@aol.com [mailto:WeslakeMonza1330@aol.com] Sent: Thursday, May 26, 2011 12:54 PM To: Deikis, John G; spridgets@autox.team.net Subject: Re: [Spridgets] ZDDP What happens if you have too much? In a message dated 26/05/2011 14:40:55 GMT Daylight Time, John.Deikis@va.gov writes: 5. Too much ZDDP is also bad for cams and tappets. The sweet spot is between 1300 and 1500 p.p.m. _______________________________________________ Donate: http://www.team.net/donate.html Suggested annual donation $12.75 Archive: http://www.team.net/archive Forums: http://www.team.net/forums |
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