[AT] Rationale for firing orders

[Roger Welsch]

I didn't mean to sound like an ingrate.  It's just that as always I am
dazzled by 1) how much there is to know, 2) how much of it one can find at
this site, and 3) how little I know about how little I know!  I have found
this whole thread fascinating, even the parts I didn't understand.  A real
seminar...

Rog


----- Original Message ----- 
From: "bwhdon" <acton at onramp.bz>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Tuesday, March 23, 2004 8:41 AM
Subject: Re: [AT] Rationale for firing orders


> 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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