<VV> Detonation, pre, and post ignition

[Ken Pepke]

Well yeah Smitty, but what does your personal dictionary say about the more critical issue of sedans and coupes?

Ken P
Wyandotte, MI
65 Monza 110hp 4 speed 2 door
Worry looks around; Sorry looks back, Faith looks up.

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On Dec 5, 2012, at 7:38 PM, Smitty wrote:

> 
> 
> 
> 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.
>