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Unless the greenies are hot on your trail with emissions tests, etc,
I would set it to where it runs the best, and I would do it with everything
hooked up so you don't have to go back and readjust everything after you
hook the hoses back up. I run mine at about 20° btdc and if they kick back
against the starter or show undue pinking, I back them off till it quits.
Volvos are so sensitive to insufficient advance that I avoid it like the plague.
(Problems related to retarded ignition include overheating of the engine and
even worse overheating of the exhaust manifold and pipe, also poor performance.)
On a number of occasions I have just turned the distributor to where it idles
the fastest and then checked, and found it to be very close to what I wanted.
I realize that the above is not congruent with the manual citations but I think
the engine design and manuals were generated under the watchful eye of heavy-
handed but not exceptionally experienced EPA folks. I like to do what is
quickest, easiest and gives best performance without sacrificing durability.
It works for me.
--
George Downs, The "original" Walrus3, Bartlesville, Oklahoma
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