Dee could you send me a PM with your phone number? I can explain my procedure
for setting my mag timing and fuel set-up. Do you have a magneto tester?
Thanks
Luis R Claudio
On Monday, May 29, 2023 at 06:35:30 AM CDT, Mark Langford <[email protected]>
wrote:
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
[email protected]
http://www.n56ml.com
Huntsville, AL
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