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It wasn't the Pertronix

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RAC68 said:
... However, it would be beneficial if, other then the use of a rivet, additional characteristics that could help identify those rotors that have shown the greatest potential to fail.

Ray (64BJ8P1)
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Not sure why it's worthwhile to take this beyond the rivet - it's been a known problem for a long time - also the Advanced Rotors are 2 for $15.00 - pretty cheap for an item that represents a single-point-of-failure on the car.

IMO this is a cart-horse situation: putting the electricity before the crack. What seems to happen is the metal drive-rivet causes a crack in the rotor; electricity follows the crack and grounds out. I think these failures are mechanical. Just saying... :smile:
 
steveg said:
Not sure why it's worthwhile to take this beyond the rivet - it's been a known problem for a long time - also the Advanced Rotors are 2 for $15.00 - pretty cheap for an item that represents a single-point-of-failure on the car.

IMO this is a cart-horse situation: putting the electricity before the crack. What seems to happen is the metal drive-rivet causes a crack in the rotor; electricity follows the crack and grounds out.
I think these failures are mechanical. Just saying... :smile:
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:iagree: Some may be mechanical:

However, in other cases the rotor performs well then suddenly fails
Consequently, one would expect immediate failure upon installation if the rotor was cracked during manufacture.
 
Keoke said:
:iagree: Some may be mechanical:

However, in other cases the rotor performs well then suddenly fails
Consequently, one would expect immediate failure upon installation if the rotor was cracked during manufacture.
Click to expand...

I was thinking the drive rivet probably heat-expands at a different rate from the plastic and after cycling for a while, a crack, or even more of a crack develops. But whatever the reason the problem has been known for over a decade.
 
Just in case no one else mentions it, there is usually a specific break-in procedure for new diffs.
:lol:
 
RAC68 said:
... My thought is that there may be more rotor failures when the increased voltage from a 40K volt charge is directed by the rotor then may occur when using an original-spec 25K volt coil....
Click to expand...

Completely agree; the increased secondary voltage will stress all the secondary components (rotor, cap, wires).
 
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