I am continuing to chase down an issue with our 1969 Superbee and was wondering if anyone at TC could help.

The ignition system consists of an MSD 6AL, an MSD Pro Billet distributor, an MSD HVC coil, and MSD plug wires.

What is happening:

If we run the car with no rev limiter chip in it, it will rev to the moon with no issues - clear through 7,000+ rpm. No issues.

If we run the car with a rev limiter chip in it, say a 7,200, it will rev to about 5,800 RPM and then the ignition will break down. It sounds like it is hitting the rev limiter (but not as cleanly as it would if it were 'really' the rev limiter).

I have changed chips, checked chips, checked wiring - everything seems ok. The only issue is with the rev limiter.

Any help?

By the way - if it helps - pics of the engine compartment at www.adivanman.com/beespecks.html (http://www.adivanman.com/beespecks.html)

Thanks
James

James.
Dont discount the possibility that the MSD is bad.

I had to move my rev limitter pill (on that 6AL) up to 500RPM past my shift point for best MPH in the quarter mile.

Your 1400 seems like a bit too much of a window.

See if the same issues carry across the board. That is, put in a 6K pill and see if it breaks up after 4500RPM? AT least you can better hear/feel things since you not screamin' down the road.

Try calling MSD tech, too. I've heard they have some good tech people. That said, I've had a few MSD 6AL boxes that "died" on me, but not the problem you're having. Good luck.

Thanks for the replies. I have spoken to MSD and while they are very helpful, were not able to come up with anything more than possible EMI and wiring issues. I double checked everything and wanted to throw this to the TC pro's before pulling the 6AL out of the Camaro and testing it in the Bee.

It is an older box and the car was, as they say, out of my control for a little while.