10-03-2020, 09:14 PM
I note that LM Williams in his Specials book, immensely revered on this Forum, recommends .004 which I recall was the company recommendation. He does not distinguish various valve steels. Austin book 843/C 1957 states .004, hot!
I presume all cars are now running modern exh valve steels which expand more than XB and earlier, so somewaht greater gap appropriate.
I presume all cars are now running modern exh valve steels which expand more than XB and earlier, so somewaht greater gap appropriate.