- Joined
- Aug 29, 2001
- Messages
- 3,239
- Location
- Norcross, Georgia, United Stat
- Corvette
- 2017 Arctic White Grand Sport
For Father's Day I got a nice MSD Pro-Billet distributor. The actual installation seems fairly simple. Take the cap off the old, mark somewhere on the car where the rotor is pointing, mark which cylinder, pull the old and replace the new lining up the marks you made and pointing the rotor at the correct cylinder.
Setting it up is the confusing part. I have read previously that you want to get 36 degrees of mechanical advance at about 3000 rpms measured with the vacuum advance disconnected though Lars' paper has indicated that 2,500 to 2,800 is acceptable.
The graph MSD provides has two advance curves that appear relevant, though I suspect that one is too aggressive. The fastest advance has the mechanical kicking in about 6-700 rpm and hitting top advance at about 2,400 rpm. I suspect that this is too agressive.
I have been leaning toward the second most aggressive advance curve which kicks in at about 1,300 rpm and has top advance kicked in at 3,200 rpm. Anybody have any thoughts about this.
The second question relates to total mechanical advance. It appears that I want 36 degrees at 3000 rpm but the smallest red bushings limits mechanical advance to 28 degrees, 8 degrees shy of where I want to be.
Any help would be appreciated.
Setting it up is the confusing part. I have read previously that you want to get 36 degrees of mechanical advance at about 3000 rpms measured with the vacuum advance disconnected though Lars' paper has indicated that 2,500 to 2,800 is acceptable.
The graph MSD provides has two advance curves that appear relevant, though I suspect that one is too aggressive. The fastest advance has the mechanical kicking in about 6-700 rpm and hitting top advance at about 2,400 rpm. I suspect that this is too agressive.
I have been leaning toward the second most aggressive advance curve which kicks in at about 1,300 rpm and has top advance kicked in at 3,200 rpm. Anybody have any thoughts about this.
The second question relates to total mechanical advance. It appears that I want 36 degrees at 3000 rpm but the smallest red bushings limits mechanical advance to 28 degrees, 8 degrees shy of where I want to be.
Any help would be appreciated.