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Nothing you mentioned will cause a rich condition. I'm not sure why a Demon would run rich at 10 psi enless it was spilling out the vent holes, but 10 psi will tend to cause the needles and seats to leak, as Dwight said 4-5 psi is pleanty as long as you have a high volume fuel pump.
Your timing won't effect your rich condition directly. You should rather, close the air fuel mixture screws using a vacuum gauge as your guide. As the engine leans out the vacuum will level out and as it gets too lean the vacuum will drop. not the position it begins to drop and back it out 1/4 turn... Do this to both the primary and secondary circuts (and or four corners).
One other thing which really helps is adding a PCV valve... I know it seems counter productive but it is a controlled vacuum leak. It sucks unmetered air into the engine and will lean you right out.
My side oiler was a smelly pig with dual 660 mechanical secondary Holley's on it. It was constantly loading up. The PCV valve smoothed it right out.
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michael
A man that is young in years, may be old in hours, if he have lost no time. But that happeneth rarely. Generally, youth is like the first cogitations, not so wise as the second. For there is a youth in thoughts, as well as in ages... Sir Francis Bacon (1561-1626)
Last edited by SCOBRAC; 07-04-2005 at 11:34 PM..
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