You'll likely find one of the holes for the pickup fixing screws is slightly elongated such that it allows the pickup position to be adjusted - the amount of travel is very small as you're only looking at a 0 - 0.5mm range at most:can't see any way of setting gap
Thanks for the reply I'm sorry didn't check advance with strobe while I had it running but I set it to 10 btdc and it had no guts and didn't want to rev very high but turned dizzy while running and found an improvement but after shutting off and trying to start found way to much advance and wouldn't start . Could I JB weld advance and try some weaker springs perhaps. So do you think I have right dizzy I was thinking I got one that needed a crank sensor
Yes, that's true, but those sparks are potentially being compromised with restricted dwell time, so not as strong as they could be, as they have to fit into a shorter finite time period. If the module was designed to provide the best (potentially longer) dwell at lower effective top rpm (as required by mere 4 cylinder engines), then that would be optimal. At the other end of the rpm spectrum, an idling 4 cylinder is only half the sparks of an 8 and it seems not all modules are equal when it comes to handling this, particularly on startup. IIRC Ferrari used two coil packs on some on their 308s using a dual trigger distributor to, in effect, implement twin 4 cylinder sparking for the best performance. I don't think this is the issue the OP has here thoughFour cylinder cars use half as many sparks per revolution as a V8 so even a high rpm 4 should not overtaxed most modules
If dwell time becomes a limiting factor, it is probably best not to use a Kettering style ignition and go with a capacitive discharge unit instead since it's timing is not limited by the coil LRC. Some CD units can actually provide multiple discharges per cycle.Yes, that's true, but those sparks are potentially being compromised with restricted dwell time, so not as strong as they could be, as they have to fit into a shorter finite time period. If the module was designed to provide the best (potentially longer) dwell at lower effective top rpm (as required by mere 4 cylinder engines), then that would be optimal. At the other end of the rpm spectrum, an idling 4 cylinder is only half the sparks of an 8 and it seems not all modules are equal when it comes to handling this, particularly on startup. IIRC Ferrari used two coil packs on some on their 308s using a dual trigger distributor to, in effect, implement twin 4 cylinder sparking for the best performance. I don't think this is the issue the OP has here though
Glad you got it running. There is nothing wrong with a points distributor other than having to replace or adjust the points every once in a while. I'm using the stock 74 Ducelier distributor with a few mods (vacuum advance removed, centrifugal advance recurved) and no problems with the tach needle buried.Just to let you know how I got on I replaced dizzy with points one I had and all is well with new cam it now revs past 7k easily so for now I'll leave it till I get some springs and try again at least I know that it was that and everything thing else is ok . Once again thanks for everyone's help great forum