Talk:Hot rodding the HEI distributor

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 Note: Cliff is missing the essential point here. This is not about what some enegine "likes" or not but pure simple science. The whole idea with adding vacum-advance is to compensate for the fact that the thinner idle/cruise-mixture are burning slower, meaning it will need an earlier spark or more timing-advance to burn properly. A properly set full manifoil vacum will also prevent detonation since it goes off as soon as the enegine starts working/loosing vacum.--[[193.71.29.173|193.71.29.173]] 05:52, July 1, 2012‎
-:You need to realize that at idle the engine is running off of the idle circuit. If the idle circuit is correctly calibrated, there is no need for extra advance. The added advance from the vacuum advance using manifold vacuum is a help when a larger cam is used that has less idle vacuum.
+:You need to realize that at idle the engine is running off of the idle circuit. If the idle circuit is correctly calibrated, there is no need for extra advance unless the can timing is causing a lean condition at idle speed. The added advance from the vacuum advance using manifold vacuum can help when a larger cam is used that has less idle vacuum.
 :Under cruise conditions it makes absolutely '''NO difference''' what the vacuum source is for the vacuum advance.--[[User:Cobalt327|Cobalt327]] 18:49, 1 July 2012 (MDT)

Revision as of 00:16, 6 December 2012