Blown Rotor on 050 Bosch dizzy, Resistor blown on rotor - why? Options

[Gatornapper]

Fellow 914'ers -

Two years ago Brandt sold me a great and rare 050 dizzy that instantly made my old 2.0 run better than ever.

I've run it hard for 4,000 miles with no problem. I have run an MSD in the car since it had one when I got it, but I did replace it with a new one a few months ago.

The old cap showed wear so I put in the new cap when I installed the 050, but the rotor looked good so I used it.

Engine died suddenly and wouldn't start last Saturday (27th) and I found this:

(IMG:http://www.914world.com/bbs2/uploads_offsite/hosting.photobucket.com-21449-1638838169.1.JPG)

Resistor in the rotor blown to smithereens. After 2 years and 4k miles.

Thankfully is was an old rotor that came in the dizzy, but Brandt also included a new cap and rotor - both hard to find. So the new rotor will go in tomorrow. Cap looks fine.

My question is: what blew this rotor? Was it the MSD? Is the MSD voltage too high for this rotor? Or was it just old and had lived out its life?

Due to the uniqueness of the 050, I'm pretty certain a rotor w/o the resistor cannot be found.

Thoughts from the braintrust are greatly appreciated.

Thinking of soldering in a wire where resistor was tho I'm not sure it can take the heat. Also will carry a spare rotor with me in the car.

GN

[Gatornapper]

Thanks guys. I think the resistor overheated and caused the thermal damage, eventually being burnt up itself. Lots of old rotors have resistors in them, but they are hidden.

Cracks are only on surface, not deep, so a soldered wire may be ok.

I ordered new cap & rotor at Zims - very expensive - but soon will have spares.

A 123 is on my wish list. For sure. Funds now flowing into the 924 Turbo resto.

Gotta make a plug for 914world.com here.

This is the best group on the web, by far. I'm on a lot of forums for cars, bikes, tractors, etc. This board has spoiled me. Every question - answers in a very short time.

924 board is sad. Days, weeks - no responses or replies. I know the 931 (internal name for 924 Turbo) is a rare car, but it has its own sections. But few people on them. Only 2 or 3 guys have replied to my questions. Sad.

But then, I'm spoiled here.

You all here are THE BEST! (IMG:style_emoticons/default/piratenanner.gif) (IMG:style_emoticons/default/piratenanner.gif) (IMG:style_emoticons/default/piratenanner.gif) (IMG:style_emoticons/default/cheer.gif) (IMG:style_emoticons/default/cheer.gif) (IMG:style_emoticons/default/cheer.gif) (IMG:style_emoticons/default/smilie_pokal.gif) (IMG:style_emoticons/default/smilie_pokal.gif) (IMG:style_emoticons/default/smilie_pokal.gif)

GN