[AT] Rationale for firing orders

[charlie hill]

I used to have a boat with an OMC stern drive powered by a 302 Ford.  The
funny thing was that the firing order was reversed from a normal Ford firing
order.  Turned out they had pumped the performance up by using a Ford 351
camshaft and for some reason they had to change the firing order because of
ballance.   That has been about 15 years ago and I can't remember the
details now.  It was a nice boat though.  I kinda wish I had kept it.

Charlie
----- Original Message ----- 
From: "David Myers" <walking_tractor at yahoo.com>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Tuesday, March 23, 2004 8:13 PM
Subject: RE: [AT] Rationale for firing orders


>
> --- "Larry D. Goss" <rlgoss at evansville.net> wrote:
> > Dudley does a good job of describing what's going on
> > in the engine, Rog.
> > When it comes to 1-2-4-3 vs. 1-3-4-2 firing order, I
> > remember being told
> > by the professor in the Internal Combustion Engine
> > course that used to
> > be part of the mechanical engineering curriculum at
> > Purdue, that
> > designers tried to even out the stresses in the
> > crank and camshaft by
> > spacing the firing along the line of cylinders as
> > far apart as possible.
> > The firing order probably doesn't make much
> > difference on an in-line
> > four, but it does make a difference when you get
> > into 6-, 8-, and larger
> > engines.
> >
> Larry, funny thing on the 4 cyl. firing order.  Early
> Clark and Yale fork lift trucks both used Continental
> F-163 engines.  One was 1-3-4-2 and the other was
> 1-2-4-3.  The engine turned the same direction, only
> the distributor was changed to confuse the
> weak-of-mind (namely me).  Now, even though one was a
> Delco and the other a Prestolite, why the change?  Oh,
> don't tell me it would only make matters worse. :-)
> Dave Myers
> Paw Paw, Michigan
>
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