View single post by Mark Rosenbaum
 Posted: 05-02-2005 03:10 pm
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Mark Rosenbaum



Joined: 03-12-2005
Location: Kingman, Arizona USA
Posts: 532
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 Judson, if the figures you're quoting for post-10480 cams are from the shop manual, General Specifications pg. 2, then it's my understanding that the exhaust cam timing shown as 66 BBDC / 21 ATDC is a typo, and that the correct figures are 66 BBDC / 26 ATDC.  According to section A52 of the shop manual, and service bulletin 75-9, engines 10480-up were timed at 100 IN / 110 EX using the appropriate gears.

Also, in regard to cam lift -- I don't find any sources that list either maximum lift, or the lift at which the cam timing is measured.  So one could perhaps argue to a scrutineer that a cam with any maximum lift was therefore acceptable, and that the specified 272^ duration occurred at, say, 0.050" rather than the zero lift, provided the cam manufacturer specified it that way.... 

Just a thought.

Last edited on 05-02-2005 03:26 pm by Mark Rosenbaum