Join Date: Oct 2014
Location: Nashville, Tennessee
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Red, well maybe. The only fly in the ointment is you seem to stop revving at 3000. That is where you might be confusing what you want your springs to do with what your total centrifigal advance really is.
If you stop revving at 3000 then all you have determined is that is all the advance you get until 3000. your may or may not have more advance.
Here is how to tell, forget 3000. remove one spring from your vac advance and just have one medium weight spring on it. set the base at 10 or 12 and start it up
now rev it up until the timing no longer will advance no matter the number once it stops and you use your light or timing tape to tell. Stop, replace the missing spring. use a medium one for now.
what is the reading? say it is 38......subtract whatever base timing you had say 12.....38 -12 = 24.......24 is your centrifigal timing. Now you want 36 or 34, say 36.
then use the centrifigal number in this example 24 and add to get 36.....add 12.....24 + 12 = 36....set your base at 12.
I think it is unlikely that you have 12 degrees of centrifigal timing, likely you have more.... and if you have say 24 centrifigal and set base at 22....that is 46 and you will destroy your engine.
so you have to make sure what your centrifigal is, once that is known subtraction gets you the base. Now don't despair that it idles nice with 22 degrees and not as good with it at 12 degrees. a properly st up vac advance can will give you 10 more degrees above idle and can go above the 36 number because vac advance drope at at WOT and does not count against total.
Make sure, I think you may have too much because you are confusing the springs and at what RPM they bring in the total centrigigal to what the total is.
The total centrifigal is limited by the weights and bushings where they reach their mechanical limits, springs have no effect on the limit,...only how fast that limit is achieved,....once you get all the things I said right then mess with the springs and change weights and bushings if required.
you will get it let us know how you do