Timing total advance

I see that WW's latest recommendation is for 26 degrees total advance.  On my distributor the numbers are  600-16-2600.  I believe that I want 16 degrees static advance at 600 rpm and have 26 degrees total  at 2600 rpm.  The original timing marks are hard to visualize.  I want to paint or mark the timing gage to 32 degrees on the alternator mounting bracket while placing the timing mark on the balancer.  This should make it easier to set the timing with a visible gage on the mounting bracket.

If I measure the circumference of the balancer and divide by 360 degrees I should know the number of degrees per inch.  I should then be able to use this to mark the gage on the mounting bracket.  

Is my thinking correct or should I re-think this?  

I hope to do fuel flow testing next week with first engine start and then set timing.  First flight in 4-6 weeks after finishing build, paperwork, inspection, and flight training at Buzzy's Flight School.

Thanks

David

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Replies to This Discussion

Permalink Reply by Fred John Thomas on February 24, 2019 at 10:44am

Do you have an advance timing light,

You could mark 0 and then just set the advance with the knob on the light

Permalink Reply by Alan Lansing on February 24, 2019 at 12:35pm

concerning the numbers on the bottom of the distributor.

600 is the maximum RPM with no advance. 

16 is the degrees advance in the distributor

2600 is the RPM at which all 16 all degrees of advance will be in.

if you want 26 degrees total advance  (at 2700 rpm minimum) , you will need about 10 degrees static advance 

the timing marks on the case are at  0, 8, and 16 degrees. it would be easy to transfer these markings to come up with the desired advance.

P.S. William Wynne shows that the length between the 0 and 16 degrees on the case is .950 inch.  Using this dimension, 26 degrees on the flywheel should be about 1.540 inch.

Permalink Reply by David Banahan on March 21, 2019 at 8:01pm

Thanks for the advice I used the .950 "/16 degrees was very helpful.  I think you may have misspoken when you wrote about total advance.  You don't adjust static advance you should only adjust the distributor for total advance of 26 degrees at 2600 rpm in this case.

Regards

Permalink Reply by Charles Miller on April 4, 2019 at 11:19pm

I believe Alan is right about setting static timing.  though it should be 10 degrees static which would be .593" from the 0 timing mark.  Set this position, then rotate the distributor until the points (correctly gapped) just break.  This should set you very close, you will still need to use a timing light to do a final adjustment when the engine is running.  Static 10 degrees plus the 16 mechanical will give you the desired 26 total. Be sure to set the gap properly before this or your Dwell will be off. if you change the gap after setting the static timing you will have to start over.

Charlie

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