zoomiepipe

Take a look at this page. It has a good description of what I'm talking about: http://www.bioinspired.com/users/ajg112/electronics/debounce.shtml

You need a capacitor, not a diode. A more complex circuit adds a diode and a resistor to prevent the cap from shorting when the switch closes. The stock condenser is beefy enough to not need the diode and resistor. It would be nice to know what happens when condenser is connected. It would solve any bounce problems, but it might also retard the timing. I don't know how much, but I'll see if I can find out what the capacitance of the typical condenser is and do some math.

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Speedster</div><div class="ubbcode-body"> So you Never used a points distributor with the HEI module, in the Z, is that correct ? </div></div> Correct. I've only used the points setup in motorcycles.

I originally used an MSD 6A on my Z so I had to have an electronic pickup distributer. I got one off a later Z. When the MSD failed, I swapped in a 4 pin HEI. The only detectable difference was the amount of money in my wallet and the amount of time I spent standing on the side of the freeway.

You could easily go half the resistance of the 330Ohm, but I'm not sure that's the problem given that you can't get it to run at even 1000 rpm. Are you sure the module is well grounded? The module body itself should be grounded as well. There could be very small points bounce that would normally be masked by the condenser when it is in the circuit. While the condenser's primary function is to prevent the points from arcing, the usual solution for switch bounce problems is to put a capacitor across the switch. Increasing the points gap causes the points arm to contact the cam higher up on the ramp. This reduces the amount the cam moves the points arm.

I'll chime in here. I'm the guy who came up with this gadget. It's not the coil. I've used the 7 pin module with two different Honda points motorcycle coils and a generic aftermarket motorcycle coil. I've used the 4 pin module which uses the same core chip as the 7 pin with everything from an MSD Blaster II to something I dug out of a dumpster. I suspect it's the triggering mechanism. Your V8 is triggering the module more frequently than my motorcycles. My 10,000 rpm 4 cyl Honda uses two coils each firing two cylinders simultaneously so it fires 10,000 times per minute. That's equivalent to a V8 at 2500 rpm. It could be too high resistence in the 330Ohm that limits current through the points or it could be points bounce that would normally be damped by the condenser confusing the module. You could try a lower resistance resistor, increase points gap to reduce points movement (also reduces wear on the rubbing block so timing is more stable) or connecting the condenser. I'm not sure what the condenser might do to timing since current charging the condenser will be much lower. - Mark