A
Anonymous
Guest
I noticed that the spark towers in my new distributor cap burned only halfway across the face of the contact at the factory-required 10 degrees advance setting. I changed the setting to 8 degrees for a while as an MPG experiment and found the engine ran more evenly and got BETTER mileage than at 10 degrees (!). Then, I happened to notice that the spark burn is also all the way across the face of the contacts, too.
Now, on the 6-point 'star wheel' used as the spark trigger, the roll pin that locates it onto the distributor shaft is offset and there are 2 such locations. The 2 locations do not generate the same timing settings if you reverse it (I tried - it would not start when I just switched the positions).
I know the width of the trigger face is equal to about 7 degrees of timing, but at the moment I do not know how far the "other hole" shifts the timing - or phasing.
So, here's my question: has anyone heard anything about 'phasing' this trigger to match the distributor cap? On old points ignitions, the rotors used to have "T"-shaped ends to allow for a wide variance in timing while still engaging the spark towers. These were removed, for the most part, because of crossfire problems with the higher coil outputs of DuraSpark, which makes perfect sense.
BUT - has anyone seen any design rules regarding these trigger units and their relationship to the spark tower positions?
Now, on the 6-point 'star wheel' used as the spark trigger, the roll pin that locates it onto the distributor shaft is offset and there are 2 such locations. The 2 locations do not generate the same timing settings if you reverse it (I tried - it would not start when I just switched the positions).
I know the width of the trigger face is equal to about 7 degrees of timing, but at the moment I do not know how far the "other hole" shifts the timing - or phasing.
So, here's my question: has anyone heard anything about 'phasing' this trigger to match the distributor cap? On old points ignitions, the rotors used to have "T"-shaped ends to allow for a wide variance in timing while still engaging the spark towers. These were removed, for the most part, because of crossfire problems with the higher coil outputs of DuraSpark, which makes perfect sense.
BUT - has anyone seen any design rules regarding these trigger units and their relationship to the spark tower positions?
