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Reply with quote  #1 
I bought my Beetle 20 years ago.  Everyone was replacing their stock coil with the Bosch "Blue" coil.  Said it gave better performance.

I burned my "Blue" coil out this summer sitting with the ignition on listening to the radio.  I also had two of the small wires crossed for the last ten years.

Question:  Is the Bosch "Blue" coil better than the stock black one?

Thank you,
IBBUGN
Wayne

Avatar / Picture

VW Guru
Registered: 02/17/04
Posts: 1,678
Reply with quote  #2 
I found this for you:

"Electrically, the blue coil is EXACTLY THE SAME as the black coil.

The joke here is that the amount of energy going into your coil is determined by the contact area of your points. If the coil used more energy you would need larger points.

The black coil uses varnish & tar in its construction, the blue coil uses Formavar (a high temp varnish) and polypropylene. (Cut them open. See for yourself. No mystery here. But lotsa sales hype.)

In theory, the blue coil should hold up better at higher temperatures but in fact, both coils do about the same.

The only time you might need more spark than the stock coil can provide is when you have a very high compression ratio or extremely wide plug gap."

Hope it helps...

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Wayne Dean

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MLTigger

VW Genius
Registered: 04/29/06
Posts: 362
Reply with quote  #3 
20 years ago Everyone replaced there vacuum advance dizzy with a 009 and "upgraded" to the supposedly better blue coil
Today everyone recommends the stock dizzy(with the Pertronix), funny how thing change
68autobug

VW Guru
Registered: 02/20/04
Posts: 1,907
Reply with quote  #4 

I had never seen a bosch blue coil in Australia, until recently being advertised locally..
shortly after I read that all blue coils will now be plain silver Aluminum..
 
a standard coil is about 3 Ohms resisitance..
 
The coil most commonly used in Australia is the Bosch GT40 coil...
it puts out much higher voltage, and will burn out if used with a High energy ignition system...
 
the Bosch 009 distributor still has the title of "Best Distributor" to use on a VW engine...   in Australia...
Many people thru away their original vacuum SDVA distrinutors over here...
 
so just about every VW engine has a 009...
 
Lee
 


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68autobug

VW Guru
Registered: 02/20/04
Posts: 1,907
Reply with quote  #5 
Quote:
Originally Posted by MLTigger
20 years ago Everyone replaced there vacuum advance dizzy with a 009 and "upgraded" to the supposedly better blue coil
Today everyone recommends the stock dizzy(with the Pertronix), funny how things change..


it looks like Australia is 20 years behind the US... 

Lee



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http://community.webshots.com/user/vw68autobug
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