[AT] Rationale for firing orders

[charlie hill]

It is because of the phasing of the lobes on the crank shaft (remember we
are talking about 4 stroke engines usually), the balance of the engine and
the sequence the intake and exhaust bursts need to be in to flow smoothly.
1,2,4 3 seems awkward when you read it that way but it is actually firing
every other cyl. in order.  If you started with 2 instead of 1 it would be
2,4,3,1.  When you think about it that is in order.  On your Allis engine,
if I remember right,  the crank is all in one plane.  I mean 2 crank lobes
are up and two are down.

Remember that you have a power, exhaust, intake and compresion stroke for
each time a cyl. fires.

Charlie

----- 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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