Hello Abowie,abowie wrote: ↑Sat Jun 12, 2021 10:20 pmShort answer:
remove Pertronics; run with points for a while and see what happens.
consider buying a quality rotor and cap from the Distributor Doctor, not SNGB etc
The distributor shaft top section is a solid unit, and the six sided cam section can't be moved relative to the notch at the top that locates the rotor arm. The top section positively locates on the lower shaft and is held with a screw. It does rotate with centrifugal advance but this doesn't affect the relationship between cam and rotor arm. So under normal circumstances these cannot become mistimed.
It is possible for the distributor drive shaft to be incorrectly timed relative to the crankshaft. We see this pretty commonly on cars we work on.
This either occurs because allowance isn't made for the rotation caused by pushing the drive gear home on the crank, or simply not aligning the shaft properly, up to and including getting it 180 degrees out. However none of this will affect timing per se because you can compensate for it by altering lead position and rotating the distributor.
Furthermore as above the relative positions of the rotor arm and cap are fixed as both are located by notches on the shaft and distributor body respectively. With points fitted I don't think it's actually possible for the spark to be mistimed mechanically.
However the OP has a Pertronics unit fitted. If I understand them correctly, they work by the Hall effect. The trigger is a wheel which is pressed down over the cam section with a magnet located to trigger the unit. Now if this wheel is mispositioned, or the unit itself is in the wrong place on the baseplate then you can well imagine that the spark might be mistimed between the rotor and the cap. If the Pertronics units provide a stronger spark as well (not sure about that) this would potentially worsen any problem.
you have described the Pertronix very well. There are six magnets in the trigger wheel that match the cylinder number.
I think also that the Pertronix has a problem and to install a breaker contact with a condenser will show if the Pertronix is the problem or not. Could be a missposition.
I will try to mill long holes in the base plate of the Pertronix hall sensor to change the position of the trigger wheel to the hall sensor.
I have installed a lambda probe in the first exhaust duct which show me the correct mixture, which is normally optimum. My spark plugs are often very sooty, and power is not that what I expected, especially at high revs.
But first back to breaker contact, is quicker..thank you for the tip I will check...