<VV> BLACK DIST CAPS REVISITED

jvhroberts at aol.com jvhroberts at aol.com
Sat Apr 3 15:09:57 EDT 2010


 Actually, the black caps DO have carbon black in them, but contrary to those who say otherwise, the concentration simply isn't high enough to lower the breakdown voltage of the material. Carbon tracking is due to flaws and impurities in the material The biggest reason the OE style caps are black is to hide the flaws! It's THE reason why nearly all materials have black pigment added to them. Nothing hides defects like carbon black! Now, things like tires use it as a reinforcing material, but most applications of carbon black is as simple pigment. 

For high voltage insulation and structural purposes, there are most definitely materials out there with fewer chances of breaking down than what the factory used. It's all about how much they wanted to spend! 

 

John Roberts
 

 

-----Original Message-----
From: N2VZD at aol.com
To: virtualvairs at corvair.org
Sent: Sat, Apr 3, 2010 10:46 am
Subject: Re: <VV> BLACK DIST CAPS REVISITED


i am not a chemist , but those black caps PROBABLY did not have carbon or  
conducting materials in them, kinda like bakelite used on high voltage 
panels  and insulators on electronic equipment since way back..(including coil 
towers).  the next best stuff was ceramic and teflon. once the stuff breaks 
down due to  moistire , that track WILL measure with an ohm meter. sometimes , 
when  conditions are right , there is a mini thunderstorm inside your 
distributor. too  large a plug gap , weak wires , a loose plug wire with a gap , 

will cause the l  voltage to build up enough to wreak havoc in the strangest 
ways, not unlike  lightning. 
i can find out the real composition from guys who know for sure later in  
the week , if this thread hangs on like most...
regards, tim colson 
 _______________________________________________
This message was sent by the VirtualVairs mailing list, all copyrights are the 
property
of the writer, please attribute properly. For help, mailto:vv-help at corvair.org
This list sponsored by the Corvair Society of America, http://www.corvair.org/
Post messages to: VirtualVairs at corvair.org
Change your options: http://www.vv.corvair.org/mailman/options/virtualvairs 
 _______________________________________________

 


More information about the VirtualVairs mailing list