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73-87 Chevy _ GMC Trucks => Performance => Topic started by: scoob4444 on February 12, 2014, 01:40:25 AM

Title: Hey just curious
Post by: scoob4444 on February 12, 2014, 01:40:25 AM

How many degrees should my vacuum advance, advance the spark on a 350?

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Title: Re: Hey just curious
Post by: Irish_Alley on February 12, 2014, 04:27:47 AM

it should be only 20° so lets say you set your timing at 16° your advance should be 36°. now not all advances are the same stock is different than aftermarket and 20° should be stock

Quote from: rich weyand on June 20, 2013, 11:46:02 PM

You want 36* of advance at 3000 rpm with the vacuum advance disconnected.  For stock distributors, this should 16* at idle with the vacuum advance disconnected.

Title: Re: Hey just curious
Post by: scoob4444 on February 12, 2014, 03:54:06 PM

Why thank you

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Title: Re: Hey just curious
Post by: Stewart G Griffin on February 16, 2014, 09:41:24 AM

These are some very good papers on timing, ignition etc.:
http://www.digitalcorvettes.com/forums/showthread.php?t=75830