cjmarzoli

1931 Dual Point Timing- Advice?

Recommended Posts

If for some reason the advance unit went to full advance when you were trying to adjust secondary points with the Syn 6 marks lined up the rotor would be past or near past terminal 6 on the cap.  That's probably wishful thinking but possible.  As far as the springs being weak the only real way to test is with a distributor machine.  My experience is if the original springs are taut enough to install over the spring posts on the advance rotor and flyweights with flyweights all the way collapsed in and no slack between spring end and groove in the post that's pretty normal.  They are very weak springs at best because the distributor rotates half engine speed and the advance unit is supposed to start at 10-14 degrees at 800 crank or 400 distributor shaft speed, 19-23 at 1800 crank/900 distributor and is fully advanced at 30-34 degrees at 3000 crank or 1500 distributor speed.  Keep in mind 34 is the total advance including the initial advance you dial in using the flywheel marks with engine stopped.

 

One other thing to try if you are game.  Someone mentioned the fact that if there is a mis match of points to the distributor THAT could affect the geometry and cause the secondary points not to be capable of being synchronized at the Syn 6 mark.  Do you know for sure that the distance from the pin the movable point pivots on to the center of the contact point on the movable point is equal for both primary and secondary movable points, I.E. are the arms the same length?  The point bases should also be symmetrically opposite each other.  If you took both bases off and matched up the bottom plates of the stationary point bases all the adjustment holes should line up perfectly.  If not you have the wrong point base on one of the point sets.  The bases should match perfectly.     

20190714_170508_LI.jpg

20190714_170435.jpg

20190714_170447.jpg

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...