Anyone try Seafoam?

[rocco16 at sbcglobal.net (Larry)]

I would be happy to expound, Chris.
Pre-ignition:  Ignition of the air/fuel mixture in a cylinder BEFORE the
spark occurs.  This is caused by a hot spot (usually carbon) acting like a
glow plug, is uncontrolled, and gives the same end result as WAY advanced,
random ignition timing on that cylinder.  If this is bad enough, it can
cause the engine to continue running after the ignition is shut off, at
which point it is called "run-on" or "dieseling".
Detonation: The uncontrolled explosion of the final portion of the air/fuel
mixture AFTER normal ignition has been initiated by the spark.  It is caused
by the sudden raising of cylinder pressure from the flame front, to the
point where it lights off (just like a diesel) the air/fuel mixtures that
are in the combustion chamber's dead spots. It is the reason "squish" is
incorporated in many combustion chamber/piston designs (to eliminate the
dead spots). This is the result of fuel with too low an octane rating for
the compression ratio, ignition timing that is too far advanced, lugging the
engine, or any combination of the above.
  The terms are used interchangably so often because it is often difficult
to distinquish between the two. But they are different, and caused by
different things.

Larry


----- Original Message ----- 
From: "Chris" <vze28h54@verizon.net>
To: "'Scirocco E-list'" <scirocco-l@scirocco.org>
Sent: Monday, April 26, 2004 11:16 AM
Subject: Re: Anyone try Seafoam?


> Many use the terms interchangeably. Please expand on their differences
> Professor.
>
> Chris
>
> At 04:42 PM 04/15/2004 -0700, Larry wrote:
>
> >Actually, ahem, hot spots in combustion chambers do not cause detonation.
> >They CAN, however, cause pre-igition....a completely different phenomena
> >with similar results.
> >
> >Larry
> >
> >
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