Ignition only

[don.broadus at exeloncorp.com]

would the difference in the kV voltage on the waste spark side have to do
with the lower cylinder pressure  or  possibly ionized exhaust products. ?
Just wondering
                                                 Don 
> -----Original Message-----
> From:	Programmer [SMTP:nwester at eidnet.org]
> Sent:	Thursday, November 09, 2000 9:42 AM
> To:	diy_efi at diy-efi.org
> Subject:	Re: Ignition only
> 
> Measure it on an ignition scope sometime...it's not the same kV required
> to
> fire the waste side as it is the power side. That's correct about the gap
> to
> "some"
> degree--other than the rotor to tower gap and the plug gap is always on
> the
> power side. Not so with DIS. The power side on DIS may be 8-10 kV, where
> the waste spark side is 1-2kV (measured).
> 
> Lyndon.
> 
> >The same current flows across both spark gaps - this must be the case
> unless
> >we're losing or gaining electrons somewhere. The high voltage winding of
> the
> >coil moves the electrons across both spark gaps in much the same way a
> >battery moves electrons through (say) two light bulbs in series (note
> Bruce:
> >that's series, not parallel, as you stated).
> >
> >Okay, the electronic engineers among us may invoke the high frequency
> nature
> >of the actual spark current, and note that the capacitance and inductance
> of
> >the high voltage leads and the coil itself have a major influence on what
> >currents actually flow where and when. But I'm not going to argue the
> point,
> >just to note that when one of the HT leads comes off, then these factors
> do
> >become important, but this isn't the usual mode of operation for DIS.
> >
> >> In other words, a wasted spark DIS doesn't save you a gap compared to a
> >> distributor based system. It just moves it.
> >
> >Correct - my original contention  8^)
> >
> >Peter.
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