I should also mention that there is only one firing order for a normal
VW type 1 engine, and that's 1-4-3-2. For some reason, the GPASC manual
has 1-4-3-2 for distributor ignition, and 1-2-3-4 for magneto. I have
no idea what Steve was thinking when he put this in his manual, unless
the magneto terminals and wires are numbered differently, but that
simply doesn't change the firing order of the cylinders, and when they
need a spark delivered for the engine to run.
Bottom line is the cam and crankshaft determine proper firing order, and
unless it's a very weird VW, it's 1-4-3-2 (and I know of none, other
than maybe the "half VW"). So if you set up number one cylinder at Top
Dead Center (TDC) on the compression stroke, with spark plug firing on
number one, and then work through the rest (as previously mentioned) in
the 1-4-3-2 order. Rotate 180 degrees and check the next, etc.
Obviously, you need to mark TDC on the spinner backplate or somewhere
else visible, so it's easy to do the next time too.
And all of this is meaningless if you don't know how the cylinders are
numbered on the actual engine. The one closest to the pilot is number
one, and the one forward of that is number 2. Closest to the passenger
is number 3, and forward of that is number 4. See enclosed image, where
"front of car" is actually "rear of airplane".
Mark Langford
m...@n56ml.com
http://www.n56ml.com
Huntsville, AL
Type 1 VW Firing Order - Specialty Buggy Supply
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