Points
 

With original points, as the plastic rubbing block wears, and the point gap closes, does that also slightly advance the timing?

Thank you.

Re: Points
 

yep.

Re: Points
 

Actually it retards the spark. As the point block wears, it allows the contacts to open later because the distributer cam as rotated further before the ramp engages the point block. If the distributer cam has rotated more, so has the piston meaning it is later in the firing cycle --or less BTDC degrees. (more degrees BTDC would be the same as more advance)

Re: Points
 

Brent is correct

Re: Points
 

After you go through this a few times, you will learn to recognize retarded time just by the sound. If its real bad, the car will cut off if its idling and you push the spark up.
On the other hand, if you only have one car, and you dont drive it much, it may be long enough between times that it slips up on you and you dont recognize it.
Good Luck!

Re: Points
 

Awesome explanation. Thank you very much.

Re: Points
 

The teacher in me bubbles up as I try to clarify the issue. The spark is generated when the points open (not close) and collapse the magnetic field in the coil. So a worn rubbing block will allow the points to stay closed longer retarding the the spark. In other words: What Brent said! :D

Re: Points
 

Fantastic, I can picture the scenario very well now.

I noticed that my initial point setting closed up rather quickly (200 miles). Then 500 more and I was still set at .020. I figured the point block wore into the cam ( new Stipe cam). Just was curious about what that did to the timing. I also understand now, it also effects the condenser and coil saturation timing.

Thank you so much for your input and willingness to share knowledge. I appreciate this site and the participants.

Thank You; Brian

Re: Points
 

appreciate the correction by others, This old dog learned something too.
Bob

Re: Points
 

I just received my November/ December 2015 " TheRestorer", and on pages 8,9&10 is a full description of timing and relationship to timing. This is the full lesson, on the subject.

Thank you all for contributing to my education.

Re: Points
 

Re: Points
 

You just got your Nov-Dec issue? That's two months late!

Re: Points
 

Ray:
I live in a very rural community, so I guess my mail is very slow.
It seems that all of my publications are held up somewhere.

Thank You.