View single post by Jensen Healey
 Posted: 03-06-2015 04:07 pm
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Jensen Healey



Joined: 03-11-2005
Location: San Anselmo, California USA
Posts: 976
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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.