I have just completed my first attempt at rebuilding coil units, and am now trying to make point adjustments before I put them on the HCCT. I understand that I need to adjust the cushion spring to .005", but the spring is resting right against the vibrator bridge. How do I go about making this adjustment to the initial .005"?
Grab another bridge and start from there. If the cushion spring is not resting on the rivet there's nothing left to adjust.
Give me a call tomorrow after 11AM EST and I will coach you through the process.
Ron the Coilman
Thanks Ron, I'll call you tomorrow. By the way I do have the MTFCA CD no. 3. You did a very good job in it, but I just couldnot get that part.
Here is another reference for coil point adjustment you may find of interest.
See sections 4.4 and 4.4.7 for some illustrations of cushion spring adjustment.
Forgot section 4.5 on coil firing consistency.
Proper cushion spring adjustment is more involved then just making sure a Double Spark does not occur.
Improperly adjusted cushion spring tension can cause significant coil firing inconsistency that causes ignition timing variation and degraded engine performance.
Thank you for the ECCT site. There is a lot of good info there.
Best information I have seen on line is here Gary:
Thanks Royce, This is very interesting.
Instruction on 1913-1927 coil point adjustment is woefully deficient if it does not cover the critical importance of proper cushion spring tension adjustment in my experience.
There are 4 key variables typically associated with coil point adjustment; Point gap, Vibrator Spring Tension, Cushion Spring Tension and Cushion Spring Travel. Finding the correct balance between them to achieve the same firing time with good consistency, on all 4 coils, can be challenging, especially if you do not have a way to observe the effect of each adjustment.
Glad the information was of help.