Bosch (copy) reluctor dizzy: regraphing?

[gerg 10,871]

I've inherited this P--C--- dizzy with the motor, and already a couple of things have gone wrong. One of them was The vac advance can, which blew a diaphragm... No big deal, the points one slipped right in its place (thanks Mr Bosch).

 

Now, if I advance it up to cruise nice (with vac advance connected to manifold, not ported) it rattles it's head off under load at around 2500-4000 (where the meat of torque is made). But then when I retard base timing back to stop it pinging, it's doughy and unresponsive down low and cruises crap. It feels like it's getting way too much mechanical advance. This is on E10 by the way. Premium doesn't seem to bother it.

 

I've read on one other forum that these dizzys are set up with weak springs and give too much total timing.

 

Is there a way of limiting the total advance without having to take the dizzy somewhere and pay for a recurve? If I have to do that, that's already halfway to buying an MSD 6A programmable, which is what you really want anyway.

[Trev Vaa 1,185]

E10 is 94-6ron depending where you buy it.

if premium fixes the problem use that and get a new dizzy.