<VV> Detonation, pre, and post ignition

[Joel McGregor]

Your dictionary matches mine on the relay rod and drag link.
Dieseling is neither pre or post ignition it is compression ignition.  If there is no spark you don't have pre or post since that is relative to the spark timing.
I had a CanAm 370 once that ran perfectly once it was hot without a spark at all.
Joel McGregor
________________________________________
From: virtualvairs-bounces at corvair.org [virtualvairs-bounces at corvair.org] On Behalf Of Smitty [vairologist at cox.net]
Subject: <VV> Detonation, pre, and post ignition

Another good example is the term used for dieseling.  The correct term  is
post-ignition but many people (including some engineers) say  pre-ignition.


The term could not possibly be pre-ignition, since if that were the correct
term the dieseling would occur BEFORE ignition.  Pre meaning BEFORE and Post
meaning AFTER.  The dieseling occurs AFTER one switches off the ignition.
***********************************
Smitty Says;  Oh Goodie, something else to create hate and discontent.  This
is from my personal dictionary which I wrote and is therefore not to be
questioned.  Detonation is the destructive explosion the takes place inside
a combustion chamber.  It can be from hot spots or compression but is not
dependent upon electrical ignition to take place.  Detonation takes place
when the flame front is not controlled and all or part of the combustible
gasses are ignited in an instant.
Pre ignition is what it sounds like.  The fuel ignition takes place before
the electrical ignition is intended and is not dependent on electrical
ignition being present.  This usually results in detonation.  Post ignition
takes place after the electrical ignition would have taken place if it had
been present, otherwise it would have been ignited as normal.  Post ignition
usually results in detonation too but not necessarily.  This depends on how
far beyond TDC the ignition takes place.  Some engines will chug along quite
happily while dieseling, just as some are happy idling with the electrical
ignition on at TDC.  Eventually the air charge will cool the combustion
chamber enough to squelch dieseling.
In any event there are such things as both pre-ignition and post-ignition.
Another thing I find in my personally written dictionary is the miss use of
the term Drag Link.  The term drag link originally applied to the long rod
that ran from the frame mounted steering gearbox pitman arm, forward to an
arm attached to the spindle.  It ran fore and aft to the car.  FCs have drag
links.  The rod that runs from tie rod to tie rod across a Corvair and
attaches to the idler and the pitman arm is a Relay Rod.  I don't care about
what any of our illustrious VV geniuses say.  I don't care what Clarks say
or the engineers that designed the Corvair say.  They are all screwed up or
they wouldn't argue with me.  I just checked in my dictionary and it is
backing me up on this.  Don't bother arguing with me.  You are wrong before
you make the first stroke on your keyboard.