RE:What is proper spark plug gap with electronic ignition?

[GLewis4457@domain.elided]

>Hi Kevin,
>
The use of a larger plug gap when using a high energy ignition system is 
quite common.
To allow a greater spark front the gap can be opened up.  The idea is that 
with a more potent  spark the higher voltage available can usefully be used 
to start the flame front burning over a larger area, hence the recent 
introduction of 3 and 4 point ground electrodes (Bosch and NGK being two 
manufacturers using this technique).>

If the implication here is that there are multiple simultaneous sparks to 3 
or 4 electrodes thus giving a larger total spark, that is not true.  The 
spark will ground to only one of the electrodes, whichever has the lowest 
resistance.  Which electrode it will ground to will vary from spark to spark, 
but it will only ground to one electrode per spark.

Jerry in Houston
--
to be removed from alfa, see /bin/digest-subs.cgi
or email "unsubscribe alfa" to majordomo@domain.elided