Re: MMC cap preferences? (fwd)

["High Voltage list" <hvlist@xxxxxxxxxx>]

Original poster: <sroys@xxxxxxxxxxxxxxxxx>



---------- Forwarded message ----------
Date: Sat, 12 Mar 2005 14:03:07 EST
From: Mddeming@xxxxxxx
To: hvlist@xxxxxxxxxx
Subject: Re: MMC cap preferences? (fwd)

 
In a message dated 3/12/05 12:38:58 PM Eastern Standard Time,  
hvlist@xxxxxxxxxx writes:


Hmm, Ross Overstreet says metallized film is better than  metal foil 
due to its "self healing" properties.  You and Terry say  that metal 
foil is better due to increased current capability.

So,  who's right, or is this one of those religious arguments that may 
never be  settled?





A friend of mine has a 1925 Maxwell (the car, not  the cap) that still runs. 
Based on his sample of one, he can claim that in  terms of longevity, it must 
be one of the best-made cars in the  world.
 
    The recommendation of metal over metallized caps is  based on hundreds of 
formal and informal tests reported over the years by dozens  of coilers. 
Based on many samples, the metal foil caps have been shown to have a  
significantly higher average life expectancy in TC service.
 
    But longshots occasionally do win horse  races.
 
    Another example: Life expectancy in the US has  increased over the last 
150 years. The fact that MY great-grandfather lived  eight years longer than MY 
father, does not change that fact. 
 
    So you see, it's not a good cap vs bad cap answer.  It's more likely to 
fail in x hours of use vs less likely to fail in x  hours of use, and that's 
what keeps the faithful faithful and the race tracks in  operation.
 
Matt D.