Dave, I just dug out my SkiDoo manual copy and the 494 spec reads "Opening 135 deg - 64 deg", "Closing 509" (?!?).
Word of warning: the file below is about 471k. You might want to pass on opening it if you are on dial-up. Here's a scan of the SkiDoo manual page referenced above: http://69.254.181.115/09-02-2.gif Using a protractor and marking on tape stuck to the primary, here is what I observed the valve doing: begins opening - 12 deg ATDC (yes, ATDC) fully open - 57 deg ATDC begins closing - 167 deg ATDC fully closed - 210 deg ATDC And yes, I triple checked the direction of rotation of the crank by pulling the starter cord. It's almost as if the rebuilder assumed the incorrect rotation direction on the crank. Thanks, Kenneth --- Dave Phaneuf <[EMAIL PROTECTED]> wrote: > Ken > I guess my brain must have died but those are really > odd > sounding numbers. That means the rotary valve is > only > open for 71 degrees of crank travel.......??? > Port timing is usually from the time the port just > starts to open > till fully closed. > Dave Phaneuf > ________________________________ > FormulaCar Magazine - A Proud Supporter of Formula > 500 > The Official Publication of Junior Formula Car > Racing > Subscribe Today! www.formulacarmag.com or > 519-624-2003 > _________________________________ > > > > _______________________________________________ > F500 mailing list - [email protected] > To unsubscribe or change options please visit: > http://f500.org/mailman/listinfo/f500 > *** Please, DO NOT send unsubscribe requests to the > mailing list! *** ________________________________ FormulaCar Magazine - A Proud Supporter of Formula 500 The Official Publication of Junior Formula Car Racing Subscribe Today! www.formulacarmag.com or 519-624-2003 _________________________________ _______________________________________________ F500 mailing list - [email protected] To unsubscribe or change options please visit: http://f500.org/mailman/listinfo/f500 *** Please, DO NOT send unsubscribe requests to the mailing list! ***
