What really goes on underneath your timing cover…

greg brillus

Well Known and Active Forum User
VOC Member
Must be a bugger when you get one tooth out.........:rolleyes:...........Do they use a + or - 4 half time pinion to get the backlash right...........;)
 

highbury731

Well Known and Active Forum User
VOC Member
Fabulous. There must be practical applications. Anybody know of any?
A late version of the Aspin rotary valve used eccentric gears to vary the valve speed. The idea was to slow the valve during combustion pressure, and speed it up during port opening. I think some of them had an eccentric drive pinion and an oval driven pinion to get a 2:1 reduction as well as varying the relative speeds.
 

timetraveller

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VOC Member
I hope that after watching the video you all feel suitably humbled and realise that working on Vincents is not as difficult as it sometimes seems.
 
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