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Old 02-15-2021, 11:16 AM   #31
BUBBAS IGNITION
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Join Date: May 2010
Location: SPEEDWAY INDIANA
Posts: 4,148
Default Re: Harmon Collins build thread ...

Ok back on it this monday morning .
Assemble the shaft etc , adjust contacts to .015 before testing can begin . Both set at .015 mount on tester and use "house" Vertex" test lead will mount both condensors later.
Each wire is 4 cylinders adjust on dwell meter to be perfect ( 015 is 70 degrees of dwell) and each degree of dwell is 2 degrees of engine timing !!
Both sets MUST be synced ( cant imagine this ever being correct with out a machine !!!!???
Note that after adjusting one set and checking the sync of the other side it is 4 degrees ( 8 degrees of engine timing ) and must be readjusted , not hard to do on a distributor machine .
If left alone one gang of four cylinders would run out of time ( sync) with the other gang !!!!!!! This is true with all the dual coil sytems .
Now we have the primary ( section one) ignition adjusted and timed so we can move on to part two ( the hard part ) checking the high voltage part of the dual coil using higher voltage for the secondary ignition firing the spark plugs .
Stay tuned we are geting there .
Something we take for granite here is the BUZZ of the distributor . After a while everyone can tell if its wrong just bu sound , this one has a very smooth BUZZ at 3000 rpm !!!!!!!! yea !!!!!!
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