Quote:
Originally Posted by Bill Verburg
yes, 19.05 was used for most of the pre '77 911s
there was a 1 year early 69 911 that used a 20.5 mm mc Porsche # 901.355.012.04, 911.355.012.02 updated version,
ATE # 3.2120 - 3901.3
but these are very difficult or impossible to come by
changing from the M/M to A or S/M doesn't change the hydraulics at all, so for performance use going bigger than 19 is a good and 23.8 is a bit much for most users
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Interesting. I have a Sept '68T built '69 that appears to have it's original MC, but it has no part number on it, and the only markings are ATE and "19".