Im very familiar with EMI, thats part of being a real auto technician.

So the best you can come up with is that these are robust and are resilliant to the voltage??

Phone that alternator rebuilder I mentioned earlier, and let him tell you how robust they are! A simple sulphated battery can cause the the rectifier to fail. Rectifiers fail because of heat, so alot depends on the heat dissipation capabilities of the alternator, where its mounted in the car, the load placed on it etc....

very good, but is it still advisable to disconnect the battery with the engine running???

what about your aftermarket stereo, your electronic autometer tach, or your replacement mechanical voltage regulator with the electronic internals?? anyone have an MSD? or some type of spark amplifier?

just how robust are the Chryco electronic regulators?? or ignition boxes?? Maybe you can test one???? And issue us safe limits with a mil spec on them??

how many of peoples cars have no up to date electronics in them??? Or an alternator??!!! and what makes you so sure the old chryco ones can take it??? and if so, why would you subject them to that abuse???

get a voltmeter for $9.99!!

is it still ok to disconnect it???

any questions?


oh, p.s. A vehicle doesnt have to be new to be succeptible to EMI. A simple magnetic pulse generator is capable of it. ie your pickup coil!

Big trucks used a twisted pair with a shielded wire for a speed sensor. This is prehistoric as it gets. It doesnt have to be a late model car to be sensitive to it like you said! often these give erronous readings due to EMI.