Re: Maximum input voltage for "can" style (Lucas/Bosch) ignition coil (fwd)

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Original poster: <sroys@xxxxxxxxxxxxxxxxx>



---------- Forwarded message ----------
Date: Mon, 15 Aug 2005 19:36:00 -0600
From: Terrell Fritz <terrellfone@xxxxxxxxxxxxxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Maximum input voltage for "can" style (Lucas/Bosch)  ignition coil
    (fwd)

Hi,

1200V is the max for the old GM HEI coil but they get foot long arcs ;-)

http://www.powerlabs.org/gmheicslr.htm

http://www.powerlabs.org/igncoildrivers.htm

Cheers,

         Terry




At 06:52 PM 8/15/2005, you wrote:
>Original poster: <sroys@xxxxxxxxxxxxxxxxx>
>
>
>
>---------- Forwarded message ----------
>Date: Sun, 14 Aug 2005 11:29:24 +0930
>From: Matthew Smith <matt@xxxxxxxxxx>
>To: High Voltage list <hvlist@xxxxxxxxxx>
>Subject: Maximum input voltage for "can" style (Lucas/Bosch) ignition coil
>
>Hi All
>
>Can anyone comment on what voltage can be put through the primary of an
>old canned (oil-filled) ignition coil without causing permanent damage?
>
>This would only be a pulse, non-repetitive.
>
>I'm back on my Kodak photoflash solid-state Marx idea; caps are charged
>through diodes, solid-state relays will switch the caps into series.
>I'm proposing a test using four caps, at about 300V each.
>
>At 1200V, that's only 100 times the designed input voltage of the coil...
>
>The SSRs are all 240V (therefore capable of withstanding 340V DC), 10A.
>
>And yes, this whole lot will be powered by a single 'AA' cell.  (The
>SSRs will be triggered by a 4.8V NiMH pack, but as it's just switching,
>I don't think that's cheating.)
>
>I'm no longer trying to kill snails (whacking them with a half-brick is
>doing the job fine) - I just want to see how big a spark I can get from
>an 'AA' cell...
>
>Cheers
>
>M
>
>--
>Matthew Smith
>Work: <http://www.kbc.net.au> | Home: <http://www.mss.cx>
>
>The time here is 11:20 and the temperature outside is 13.7°C; today's
>maximum is 15.7°C with a minimum of 10.6°C.  We have had 0.0mm of rain
>today, with a total of 12.6mm in the last week.  The wind is currently
>due ESE, gentle breeze, force 3 (11.4mph), gusting to moderate, force 4
>(16.4mph).