Mark, This is where I stand.
In my number one cylinder,, the magnitor is firing (sending a spark in the exhaust phase. When the air is coming out. Million dollar question is 1. Where is top dead center? Is there a marking for it? 2. How do I adjust the mag to fire in the compression at 28 degrees BTDC. 3. Talked to a mechanic - he said he needed a procedure or timing marks. 4. Is there a Hapi manual out there that is electronic that someone can share? Dee On Mon, May 29, 2023 at 7:36 AM Mark Langford <m...@n56ml.com> 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 LangfordML@N56ML.comhttp://www.n56ml.com > Huntsville, AL > > > [image: Type 1 VW Firing Order - Specialty Buggy Supply] > -- > KRnet mailing list > KRnet@list.krnet.org > https://list.krnet.org/mailman/listinfo/krnet >
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