Pendine Prep 7. Reworking an incorrectly machined cam back to stock.

[Mart]

Hello and welcome to Mart's Garage. In today's video update I continue with the French Flatty build by reworking the camshaft drive slot to stock specs. It was machined wrong and I had to run a modified drive tang on the distributor. I ran it in with a similar job, to modify some 8BA cams to 59A type drive. So a bit of machining this week, lathe work, drilling, tapping and some horizontal milling work.
I hope you find it interesting, it's another step in the right direction in getting the car ready for racing on the beach at Pendine.
https://youtu.be/Ydy38R7EPL8

[corvette8n]

Mart: the wrong machining was it the cam makers fault?

[Mart]

Originally Posted by corvette8n

Mart: the wrong machining was it the cam makers fault?

Yes, either them or whoever supplied the blanks. It happens, I guess. I did have correspondence with them at the time, but with the distance involved and the fact that the motor was built up and relatively easy to adapt the distributor I said not to worry about it.

I think I may have heard someone else report a similar problem. Not 100% sure on that, though.

Mart.

[VeryTangled]

Thanks again for bringing us into the garage, Mart! Very good episode.

[mfirth]

I'm learning the ways of a 59a by watching. THANKS Mart!!!

[Mart]

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Thanks for tuning in, fellas.

[Ol' Ron]

Atta boy Mart, Making mistakes make you smarter. I convert 59 and earler cams to 8BA. I know they make adapters, but most are not concentric, and are quite expensive. I jut bore a hole into the snot of the cam , press in a short shavt and drill the oil hole and turn it down for the gear. Not as complicated as your slotting job. This is one reason I like working on these engines, making parts, allot more fun than buying them.
Gramps

[Bored&Stroked]

Originally Posted by Ol' Ron

Atta boy Mart, Making mistakes make you smarter. I convert 59 and earler cams to 8BA. I know they make adapters, but most are not concentric, and are quite expensive. I jut bore a hole into the snot of the cam , press in a short shavt and drill the oil hole and turn it down for the gear. Not as complicated as your slotting job. This is one reason I like working on these engines, making parts, allot more fun than buying them.
Gramps

Yes! Any your method actually delivers oil to the thrust surface at the front (none of the bolt-on ones do that I've ever seen). Secondly, the bolts don't hit the timing cover and throw a bunch of iron/aluminum shavings down into the oil.

The thing to note for anybody reading this is that you STILL need to drill the 59AB cam for an oil passage down to the pressed in shaft - to mimic a 49-53 cam. If you don't do this, then there is no way for the pressurized oil to get through to the front thrust.

Also, this means that you can't just throw a 'Speedway' adapter onto the front of a 59AB cam (in the engine) and not have issues at some point.