[AT] Rationale for firing orders

[bwhdon]

Well!

----- Original Message -----
From: "Roger Welsch" <captneb at micrord.com>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Tuesday, March 23, 2004 6:24 AM
Subject: Re: [AT] Rationale for firing orders


> Okay, enough of this thread.  I don't mind feeling innocent, or clueless,
or
> even ignorant.  But downright stupid is carrying things too far.
>
> Rog
>
>
> ----- Original Message -----
> From: "Larry D. Goss" <rlgoss at evansville.net>
> To: "'Antique tractor email discussion group'"
> <at at lists.antique-tractor.com>
> Sent: Monday, March 22, 2004 7:33 PM
> Subject: RE: [AT] Rationale for firing orders
>
>
> > I think there are probably some good arguments in favor of the in-line
> > six as being POTENTIALLY the smoothest running engine.  It has the
> > unique condition of being both dynamically and physically balanced.  I
> > have never done an actual comparison of the harmonic balancers on the
> > front end of the crank, but I was led to believe they are lighter and
> > smaller for the horsepower of the engine than other designs.  But then
> > there's also the horizontally opposed four ala Volkswagen.
> >
> > Larry
> >
> > -----Original Message-----
> > From: at-bounces at lists.antique-tractor.com
> > [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Steve W.
> > Sent: Monday, March 22, 2004 11:53 AM
> > To: Antique tractor email discussion group
> > Subject: Re: [AT] Rationale for firing orders
> >
> > The firing order is to even out the power pulses. In a four stroke
> > engine with 4 cylinders you set it up so that one piston is always
> > producing power.
> > In your example starting with No.1 firing at TDC and No2 is on BDC the
> > start of compression, No3 would be at TDC on exhaust and No 4 would be
> > at BDC on the intake stroke. This assumes a flat crank with throws at
> > 180 degrees.
> > JDs make that unique sound because they actually coast 360 degrees
> > between each power impulse.
> > That is also the reason why Harleys make a unique sound, and why they
> > shake your teeth out when they run.
> > The firing order and power impulses are also the reason why an Inline
> > engine or a 180 degree V are the smoothest running engines, Power pulses
> > come evenly spaced. The next best are the 90 degree V engines.
> >
> > Steve Williams
> > Near Cooperstown NY
> >
> >
> > ----- Original Message -----
> > From: "Roger Welsch" <captneb at micrord.com>
> > To: <at at lists.antique-tractor.com>
> > Sent: Monday, March 22, 2004 12:09 PM
> > Subject: [AT] Rationale for firing orders
> >
> >
> > > Can someone help me with a brief and simple explanation of why a
> > motor's
> > > firing order wouldn't always be one-two-three-four?  My Allis WCs are
> > > one-two-four-three but I have no idea why....  I love to kid my
> > in-laws that
> > > they've always prefered John Deere Bs because they can remember the
> > firing
> > > order.....
> > >
> > > Roger
> > >
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> >
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