Re: Harmon Collins build thread ...
Ok some more work today :
One of the weak points on a collins is the plastics , think about it they are are at the least 50 years old . When new they used 6 volts and very low current levels ( maybe 4 to 5 amps at the most ) . One of the problems is what i call "chevrolet mentality" . Chevrolet mentality is when you and your "chevrolet " friend think that 12 volts and a .4 ohm msd super coil made Grumpy Jenkins Camaro run fast it should work on your early ford !!! And it will work at least for a little time .
We suggest using the Bosch blue coil from amazon .com # 00012 Bosch Blue ......
Heres a secondary ignition law for you ....
YOU CAN NOT PREVENT SECONDARY IGNITION FROM FINDING A PATH TO GROUND !!! EVEN IN A VERY OPEN CIRCUIT "IT WILL SEEK AND FIND A GROUND SOMEWHERE "
IF YOU OPEN CIRCUIT THE SPARK WILL TRAVEL THRU SOMWHERE EVEN THOUGH YOU MAY NOT SEE IT OR WHERE IT WENT .
So using those thoughts the other issue with these distributor is they often will only run on four cylinders . What we have found is that the secondary spark is grounded somewhere ???
To help prevent this we use GE Gyptal insulating paint , the holes for the coil screws are a great place for voltage to arch and kill four cylinders are treated with a coat of gyptal paint as well as the inside the distributor cap.
These parts are kinda hard to get but dzus on the board used to make some replacements . ( more about that later )
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