CLASS RACER FORUM - Classic Car Engine Additives

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Bill Pomponi

01-26-2009 12:55 PM

Classic Car Engine Additives

ZDDP Additive for Classic Cars with non-roller lifters

As I understand the it, the phosphorus has been removed because it plates-out on catalytic converters, causing them to fail.

Here is the web site of an additive supplier. http://www.zddplus.com

Any comments/suggestions??

Greg Barsamian

01-26-2009 01:33 PM

Re: Classic Car Engine Additives

Read Hot-Rod magazine article, June 2006 "When Good Cams Go Bad"

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