jeff1216 Posted October 24, 2003 Share #1 Posted October 24, 2003 1978 280zHead is back from the machine shop ( e88 head all new 280 valves and springs, hot cam)Arizona intake with a holley 390.MS square port headerI am going to be putting it all back together this weekend. I am interested pinning the dizzy at full advance......How do I do this?I can see how to pin the vacuum advance with a small machine screw but doesnt this car also have a mechanical advance?If so how do I pin it?Do I need to remove the entire dist. to do this?How many degrees of advance do I need to set it at while at 3k rpm?What type of performance gains can you get by doing this?Thanx in AdvanceJeff Link to comment Share on other sites More sharing options...
Dtsnlvrs Posted October 24, 2003 Share #2 Posted October 24, 2003 I would not recomend trying to "pin" the mech advance cams.....but I will tell you that you want around 33-35 degrees total advance at 3k rpm. Link to comment Share on other sites More sharing options...
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