[DML] Re: Bolt On Performance.
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[DML] Re: Bolt On Performance.

Bingo! My PRV runs a .040" plug gap -- one of the advantages of high
voltage ignition. Works like a charm.

Of course capacitive ignition would work better, but unless an owner
is willing to swap out the control module he or she is stuck with an
inductive coil.

You see how much grief those of us who run 40K canister coils (and are
willing to publicly admit it -- who knows what evil lurks behind the
plastic covers of those quiet owners) are getting. Just imagine how
much worse it would be if we added MSD modules to the mix....

Bill Robertson

>--- In dmcnews@xxxxxxxxxxxxxxx, Paul Gress <pgress@...> wrote:
> 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
> 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
> 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
> Paul

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