Distributor trigger ?
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5th Wheeling
Joined: Feb 2005
Posts: 28
Likes: 1
Distributor trigger ?
I am trying to re-tune my stock Duraspark II distributor with some lighter springs and cannot get the trigger off the distributor shaft. Is there a trick/method to getting that little spring clip under the felt pad off?
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
The "trigger" or armature comes off with a small gear puller. Do not lose the roll pin that keeps it from rotating on the shaft.
The spring clip under the felt lubricant reservoir can be removed with some needle nose pliers if you are careful. Grasp one upright wire and "peel" it out of it's groove. The spring clip retains the "weight cam" or sleeve and plate assy onto the distributor shaft. There is a bronze bushing between the shaft and the sleeve that is lubricated by the felt pad.
Some specs if you need them:
1971 distributor & engine specifications for the 400
================================================== ==
This was the GOOD year for the 400 engine before it was smogged to death.
-------------------------------
Distributor part #D00F-U
Centrifugal Advance Start: 0-0.5° @ 350RPM Finish: 14° @ 2275RPM
Vacuum Advance Start: 0-1° @ 5" Finish: 12.5° @ 25"
Point Dwell: 26-31°
Initial Timing: 10° BTDC, 6°BTDC California.
Vacuum given in inches of Mercury (Hg).
RPM specified as distributor RPM.
Degrees specified as distributor degrees.
---------------------------------
Double those values for crankshaft figures:
Example: 0-0.5° @ 350RPM distributor becomes 0-1° @ 700RPM on the engine.
--------------------------------
The spring clip under the felt lubricant reservoir can be removed with some needle nose pliers if you are careful. Grasp one upright wire and "peel" it out of it's groove. The spring clip retains the "weight cam" or sleeve and plate assy onto the distributor shaft. There is a bronze bushing between the shaft and the sleeve that is lubricated by the felt pad.
Some specs if you need them:
1971 distributor & engine specifications for the 400
================================================== ==
This was the GOOD year for the 400 engine before it was smogged to death.
-------------------------------
Distributor part #D00F-U
Centrifugal Advance Start: 0-0.5° @ 350RPM Finish: 14° @ 2275RPM
Vacuum Advance Start: 0-1° @ 5" Finish: 12.5° @ 25"
Point Dwell: 26-31°
Initial Timing: 10° BTDC, 6°BTDC California.
Vacuum given in inches of Mercury (Hg).
RPM specified as distributor RPM.
Degrees specified as distributor degrees.
---------------------------------
Double those values for crankshaft figures:
Example: 0-0.5° @ 350RPM distributor becomes 0-1° @ 700RPM on the engine.
--------------------------------
Last edited by Torque1st; May 21, 2006 at 05:56 PM.
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
Thanks! 
I have a ton of info from here and other sources saved as a file. Sometimes I have been tempted to organize and edit it better and post it as a tech paper. I am not sure how legal it would be tho. I have attempted to preserve the sources but some of the info is edited for clarity or my own notes added etc.
I have a ton of info from here and other sources saved as a file. Sometimes I have been tempted to organize and edit it better and post it as a tech paper.
I am not sure how legal it would be tho. I have attempted to preserve the sources but some of the info is edited for clarity or my own notes added etc.
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