View single post by Jensen Healey
 Posted: 03-06-2015 03:07 pm
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Jensen Healey

Joined: 03-11-2005
Location: San Anselmo, California USA
Posts: 983
There are many vacuum advance and vacuum retard diaphragms available for the 25D. The JH used vacuum retard for pollution control, exactly the opposite of what is needed for performance.
Adapting an actual vacuum advance seems like a great idea to me.