MSD ignition timing?

Z28-69 · 05-10-2009, 02:40 PM

Hey guys could use some help. I am running small block chevy with MSD 7AL-3 box, MSD distributor. Timing is locked out and I set timing at idle. If I run motor up the timing changes 3 plus degrees. Everything seems tight, only thing that maybe question would be I use the caps j hooks to hold cap down. I know I can cut those off and run screws just didn't think I needed to. Is this just part of the muli spark playing with timing light? I can use cheap light or expensive Mac timing light and get same read. Next question....which timing mark do I believe? At idle or rpm's up?

05-10-2009, 02:40 PM	#1
Z28-69 Junior Member Join Date: Dec 2007 Location: Grand Rapids MI Posts: 66 Likes: 0 Liked 0 Times in 0 Posts	MSD ignition timing? Hey guys could use some help. I am running small block chevy with MSD 7AL-3 box, MSD distributor. Timing is locked out and I set timing at idle. If I run motor up the timing changes 3 plus degrees. Everything seems tight, only thing that maybe question would be I use the caps j hooks to hold cap down. I know I can cut those off and run screws just didn't think I needed to. Is this just part of the muli spark playing with timing light? I can use cheap light or expensive Mac timing light and get same read. Next question....which timing mark do I believe? At idle or rpm's up?