I think many of us drive our cars regularily on the street, and some of us like to drive long hauls (eg CB). While I like my timing set-up for max performance typically, I would be willing to 'de-tune' it to save some gas on a long trip. So what are the tips??

Should I retard the timing a touch?
Should I maximize vacuum advance on my adjustable crane can (or can I have too much, not counting ping?)
Any other tips?

Thanks for any comments.

As a general rule, running just short of pinging gives you the best mileage.

Originally posted by Bow_Tied:
I think many of us drive our cars regularily on the street, and some of us like to drive long hauls (eg CB). While I like my timing set-up for max performance typically, I would be willing to 'de-tune' it to save some gas on a long trip. So what are the tips??

Should I retard the timing a touch?
Should I maximize vacuum advance on my adjustable crane can (or can I have too much, not counting ping?)
Any other tips?

Thanks for any comments. Bow_Tied,

The timing that gives you best performance is the timing that will also give you the best economy assuming that you use centrifugal and vacuum advance.

Mike

Originally posted by Greybeard:
As a general rule, running just short of pinging gives you the best mileage. Ditto on that, almost. The reason for vacuum advance is to dial in more advance at highway speed and part throttle operation. You might try adding a couple of degrees advance, but I really don't think you'll see a significant gain. The vacuum advance pretty much takes care of it for you.