Thoughts on Helmet Dizzy rebuild?

[Ziggster]

Was having issues loading the rest of the pics. Kept saying I had already uploaded the pics.

[Ziggster]

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[Ziggster]

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[Ziggster]

Now some from the crab dizzy.

[Ziggster]

Crab dizzy breaker point mounting plate.

[Ziggster]

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Crab dizzy mechanical weight plate.

[Ziggster]

Crab dizzy mechanical weight plate - lower?

[Ziggster]

Comparison of both "upper" mechanical weight guide plates. The one on top is from the helmet and the lower one is from the crab. The opening for thr helmet is larger which I'm guessing allows for more movement and more "advance". Is this correct as this seems opposite from what I read meaning the 11A version has more "advance" than the 68 version.

[Ziggster]

Comparison of both the "lower" mechanical weight quite plates. You can see that they are quite a bit different in terms of the position of the openings versus the slot. Does anyone know why and what this differences equates to?

[35fordtn]

Originally Posted by Ziggster

Comparison of both "upper" mechanical weight guide plates. The one on top is from the helmet and the lower one is from the crab. The opening for thr helmet is larger which I'm guessing allows for more movement and more "advance". Is this correct as this seems opposite from what I read meaning the 11A version has more "advance" than the 68 version.

That does not control the total advance. The slots in the shaft is what controls the advance limits. That is what I am calling the index plate that you have pictured. When using 68 weights you have to use the 68 plate and vice versa. The 11A is marked and the 68 has no markings as your picture shows. You'll also feel the difference in the weight of the springs amongst the 68 versus the 11A. That is what controls the initial curve

[Ziggster]

Comparison of both the mechanical advance weights. They look identical to me, except the ones from the crab have a slight angular "notch" cut out from the one side. The crab weights are the ones on top.

[Ziggster]

Damn pic won't load...

Ok. Makes sense. Didn't check spring force.

[Ziggster]

Didn't get a chance to order the parts, but did try out the glass bead I picked up yesterday. Very impressed with the results.

[Ziggster]

A few other pics...

[Ziggster]

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[Ziggster]

Just ordered a bunch of stuff from Mike at Third Gen including a used 11A shaft. Super nice to deal with. Hoping I'll have my flattie running in the next month or two. Lol!

[motordr]

Originally Posted by Ziggster

Just ordered a bunch of stuff from Mike at Third Gen including a used 11A shaft. Super nice to deal with. Hoping I'll have my flattie running in the next month or two. Lol!

When you have it all done stop in at my place and we can spin it up on the SUN 404 Distributor Tester to check the advance curve, dwell and point float.

[Ziggster]

Haha! Thanks for the offer! I grew up in London, ON and was meaning to head down there to visit some relatives over Christmas, but because of COVID that plan has been shot to hell. I did pick up a nice Allen syncrograph last year down in Rochester, NY. I need to get that up and running as well.

[Ziggster]

Just came across this nice vid on rebuilding the helmet 68A distributor.

https://youtu.be/li6IlgzgWh8

[Ziggster]

Got the first coat of my aluminum high heat paint on. Someone went to town with a grinder or belt sander on the nose. Not sure if I'll try to fill it in a bit.