On the subject of coils
- twin coils wouldn't help much because the high voltage would be the same (same dwell from the dizzy, same output)
- dual points help by getting more dwell ... but this mainly needed at higher rpm
- Instead of a new dizzy, you could install a Pertronix kit, then the points trigger the blackbox which fires the coil
- The newer coils (without ballast) have a higher voltage output, so they can run big plug gaps to fire lean mixtures. But a points setup would burn up from the extra current (hence need for electronic ignition retrofit)

But if you don't need it, don't bother ...

hey rc, when i had that set up runing i had a similar problem, it definatley felt to me like boost pressure was overcoming fuel pressure. i had a holley blue and the reg bypassed under boost. I tryed all sorts of ways to up the fuel pressure, i tryed streaching the spring in the releaf valve on the fuel pump, but i ended up limiting the boost to under 10 and there was never a problem.
i think to try colder plugs would be well worth a try, even just one heat range. That wouldnt cost a heap of money

I agree with phunkdocta - the standard coil is not the problem. I ran 12psi and 8000rpm on my old A14 turbo with standard coil, standard points dissy, and standard mech fuel pump.

I tend to think your overboost theory is more likely. Try adjusting the wastgates to 9psi and edging up till your limit of 10psi is reached without any cutting out. Although that's probably not so easy to do wit the TT setup either...

well i hope its something i can fix for free at the moment cause im as broke as could be but will see in the future.. cheers

Quote:

Well....it did to a high horsepower rotor. Only because standard type plugs just weren't up to the job I think. The plugs i used are meant for 2-stroke motorbikes.

The difference in your motor might not be quite so drastic, but its something worth trying. Colder plugs will help hold off detonation too.

If money wasn't the issue you can get a stoichio meter which measures fuel mixture from the exhaust using an O2 sensor, that would give you a idea on whats going on.

changing plugs made THAT much diffrence????????

Try a colder plug....that has always helped me squeeze a bit more boost out.

With standard plugs, the 13B was limited to about 10 psi and 6500 rpm. But with B9EGV's I could get 18+ psi and 10,000 + rpm

and by making it easir for the spark to jump shuld alievate the problem temporarily till more thought can produce a long term solution

the pressure of the fuel pump should go up with boost pressure 4psi @idle and 14psi with 10 pound boost, you wont get bigger spark from closing the gap, it will just make it easier for the spark to jump.