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Join Date: Aug 2007
Location: North Queensland Australia
Posts: 35
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After market ignition whoes

I'm having a little issue with rotor buttons after, say 4 good hard drives.
The insulated filler on the rotor is melting, my guess is these distributors
may not be able to cope with a very high energy coil ( 45,000 volts).
The engine starts missing under load, the rest of the system looks fine.
I'm running a Pro-comp 6AL, same as MSD ignition with the coil supplied.
Thinking of trying a MSD blaster as recommended in the 101 projects book.
Any ideas? or am I wrong?
Old 09-13-2008, 06:04 PM
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Max Sluiter
 
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Location: So Cal
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You can dig out the resistor and solder in a length of heavy gauge wire, then seal with some epoxy.

This can handle the power without heating and melting.
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Old 09-13-2008, 06:46 PM
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I had the same problem...when you switch to the MSD CDI box, you have to switch to the rotor that doesn't have the resistor in it....or it will melt the expoxy on the top of the rotor. Do a search here or on Rennlist and you'll see the problem described better. I didn't solder the wire.....just bought another rotor that was designed to accomodate the change to MSD.
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Old 09-13-2008, 08:09 PM
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Thanks men, very helpful. I did not know there was a resistor under the filler.
Just testament to this site and the people who live and breath these cars.
Old 09-14-2008, 12:07 AM
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Acceleration Junkie
 
Join Date: Aug 2007
Location: Laguna Beach, CA
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Quote:
Originally Posted by FAT930 View Post
. . .The insulated filler on the rotor is melting, my guess is these distributors may not be able to cope with a very high energy coil ( 45,000 volts).
Yes, a common effect of passing a lot of power through the rotor when switching to an MSD ignition.
Dig the remains of the resistor out, scrape the remaining copper contacts at each end of the rotor shiny clean, solder in a piece of solid 12awg wire (common wire size used in residential house wiring), and re-epoxy.
Old 09-14-2008, 08:49 AM
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