Re: [DMCForum] Re: Eliminating pre-ignition

["Jim Strickland" <ihaveanaccount@xxxxxxxx>]

Noo!!!  Martin's right.  In your lincoln, you would "retard" it just a
hair, away from TDC (earlier).

Advancing is "late" firing of the plug in relation to the location of the
piston.

Jim

On Tue, 21 Oct 2003 14:59:50 -0000 "content22207"
<brobertson@xxxxxxxxxxxx> writes:
> Sure you're not using terms backwards? Moving spark closer to TDC
> leads to pre-detonation.
> 
> Old fashioned "power timing" (which I have to do to one of my high
> mileage Lincolns because outer ring of harmonic balancer has 
> shifted)
> involves moving spark towards TDC until valves start to clatter, 
> then
> advancing just a hair.
> 
> Bill Robertson
> #5939
> 
> >--- In DMCForum@xxxxxxxxxxxxxxx, Martin Gutkowski <webmaster@xxxx> 
> wrote:
> > No mate, you RETARD the spark to eliminate knocking/pinking.
> > 
> > content22207 wrote:
> > 
> > >Yep -- that's how you do it. Pre-ignition caused by mixture 
> exploding
> > >before a spark hits it. Can eliminate by reducing volatility of
> > >mixture (higher octane), lowering chamber temp (cooler plugs) or
> > >moving spark farther from TDC. Unfortunately last method also 
> cuts
> > >down on power.
> > >
> > >Bill Robertson
> > >#5939
> > >
> > >  
> > >
> 
> 
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