Ok, so then, within reason, can we say that knock is not related to mixture
just to timing? Obviously all bets are off if things are wacked out but,
referring back to our given car will the car knock if the mixture is off?
James Nazarian
71 MGB Tourer
71 MGBGT V8
85 Dodge Ram
----- Original Message -----
From: "Hugh Wolfe" <hugh_wolfe@hotmail.com>
To: "Max Heim" <mvheim@attbi.com>; "MG List" <mgs@autox.team.net>
Sent: Thursday, April 10, 2003 9:11 PM
Subject: Re: mixture and octane
> James you are correct. The higher the octane content the slower the fuel
> burn (spread of the flame front across the cylinder) thus resulting in a
> smoother power stroke as opposed to a sudden (relative) explosion (knock).
> Just remember that we are talking micro seconds here, nothing you can
> measure. But you sure can hear that knocking when you buy the cheep
stuff!
>
> Hugh
>
>
> ----- Original Message -----
> From: "Max Heim" <mvheim@attbi.com>
> To: "MG List" <mgs@autox.team.net>
> Sent: Thursday, April 10, 2003 4:52 PM
> Subject: Re: mixture and octane
>
>
> > AFAIK it has nothing to do with mixture, just timing. It's not like the
> > total energy contained in premium fuel is greater, it just has better
> > anti-knock qualities (which I think has to do with flame spread, but I
may
> > be talking through my hat).
> >
> > on 4/10/03 4:43 PM, James Nazarian at jhn3@uakron.edu wrote:
> >
> > > List, I'm looking for a little experience to weigh in on something
here.
> > > I'm curious, given a particular car and driving conditions, will
higher
> > > octane gas allow you to lean out the mixture? or does it just allow
you
> to
> > > advance timing? I'm not looking for any particular advice here, just
> > > curious about how octane rating and mixture interact.
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