Re: [DML] Re: Bolt On Performance.

[Paul Gress <pgress@xxxxxxxxxxxxx>]

welmoedj wrote:
> Cap and rotor already had been replaced.
> Old wires and new wires (factory type) would not have made much 
> difference as the resistance would still be higher than that of the 
> cables provided by John.
> You may be aware of the fact that a higher output voltage of the coil 
> improves the quality of the spark.
> A standard 18 kV coil is no match for a 40 kV coil.
>   
I thought one form of a voltage regulator was called a "spark gap".  It 
was used for pulsed lasers in the early days, as voltage built up it 
would then conduct to provide a pulse of voltage to the illuminate the 
laser light source.  What I'm trying to say, is you need no more voltage 
then that required to produce a spark.  If 18,000 volts takes care of 
that, having 40 kv is not needed.  The voltage is not stored then 
released as in capacitive discharge, it is built up gradually until the 
spark is created.  It has a rise time.  The things that influence the 
rise time are, resistance, leakage, and fuel ionization.  Resistance is 
affected by wire conductor condition, carbon deposits on distributor 
cap, rotor and spark plugs; leakage is caused by insufficient hv wire 
insulation; and fuel ionization is affected by sharp edges on spark plug 
electrodes (so multi-electrode plugs do help).

So yes I agree, having a higher output voltage will not improve 
performance unless one of the items I pointed out above are deficient.  
Higher output voltage can extent the useful life of those components.

You can increase the spark plug gap to utilize your higher output 
voltage and thus maybe ignite a leaner fuel mixture that may not have 
ignited with a weaker spark.

Capacitive discharge is better that it will overcome some insulation 
leakage that a standard ignition cannot, thus increasing the useful life.

Paul


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