Testing the HiRev 7500

all very interesting

you weren't as shouty and angry as i expected :) ..... some might say "real life" affable.. in fact

probably explains why the advance curve set in a points distributor from the factory differs so from the curve in an electronic...
they chose which compromise they wanted to live with,
mechanical switch that wears out, burns out, limits current and involves some owner skill to replace and set up or 2 of them that takes even more skill to set up
or
an electronic switch where the timing varied in what was probably, with one manufacturer and a known supplier of parts, a predictable way, that could be masked by a different curve...on a system that involved less skill to set up.... 1 brass feeler gauge and a light.

after all doesn't matter what happens before as long as the spark arrives at the right time

cost of support and ease of ownership won out...

its all linked to the current in the primary and the coil used...higher current, the faster coil gets to max flux, the shorter dwell needed, the higher rpm or greater no of cylinders supported. trouble is you have to switch that current and too much will wreck your switch.

i remember arguing with a fella who insisted a coil with a primary made from solid copper would be great, think of the current said he...!....
A slight misunderstanding or transformer theory was leading him way way down the wrong path


Dave