DIY_EFI Digest V5 #663

[John Dammeyer]

Oh I'm sure it goes right up there.  Like I said,  with a 1500:1 to
2000:1 turns ratio the theoretical voltage is staggering.  But,  even
under the high pressure of the combustion chanmer (harder to create a
spark there than in open air) most of the time with clean plugs 20Kv is
all you probably will see.

John Dammeyer


> -----Original Message-----
> From: owner-diy_efi at diy-efi.org 
> [mailto:owner-diy_efi at diy-efi.org] On Behalf Of Carter Shore
> Sent: Thursday, July 12, 2001 5:39 AM
> To: diy_efi at diy-efi.org
> Subject: Re: DIY_EFI Digest V5 #663
> 
> 
> On Wed, 11 Jul 2001 23:48:25 
> John Dammeyer wrote:
> 
> >I've never been able to measure the open circuit
> >voltage on the output but obviously the turns ratio
> >on the coil determines >that ultimately.
> 
> I use an old TV HV probe, modified with a BNC
> connector, and a flying lead with a ground clip. Hooks
> right onto my O-scope.
> 
> Lot's of interesting things can be observed.
> 
> Disconnect one of the plug leads on a waste spark
> setup, watch what happens to the other side.
> 
> Carter
> 
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