CDI powerfull multi-spark

[Jemison Richard]

Not from a spark but preignition can sure do it.  So can detonation.  Is the
hole edges nice and smooth (preignition) or kinda rough or atleast mottley
looking (detonation)?  I've never heard of the spark itself melting anything
(maybe your engine was using the piston as the grounding electrode? :-)
What does the plug look like?  If it looks good - you know the spark was
going there.  Funny the piston would melt and the plug wouldn't even look
hot.  

Hope this helps.  Couldn't avoid the humor (or at least the attempt at it).
I know this can be really frustrating.  I'd also be curious what the timing
actually was on the engine!

Rick

> -----Original Message-----
> From:	Michael Farrugia [SMTP:mikefarr at hotmail.com]
> Sent:	Thursday, December 10, 1998 3:04 AM
> To:	diy_efi at efi332.eng.ohio-state.edu
> Subject:	CDI powerfull multi-spark
> 
> Hello all,
> I have put a CDI which gives a fairly powerful multi-spark on a 2 litre 
> Ford pinto engine.  This engine is tuned to go up to 8500 RPM.
> However after some runs the engine broke.  When we opend the engine up 
> we found that on piston was melted.  A friend of mine told me that a 
> powerfull spark may be the cause.  Has anyone encountered such a 
> situation and how can it be rectified.
> Thanks in advance
> Michael
> 
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