• Hi Guest!
    You can help ensure that British Car Forum (BCF) continues to provide a great place to engage in the British car hobby! If you find BCF a beneficial community, please consider supporting our efforts with a subscription.
    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this gawd-aweful banner
Tips
Tips

It wasn't the Pertronix

Share this page

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)
Click to expand...

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:
Click to expand...
: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).
 
Back
Top