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And then it went Bang

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And then it went Bang
Austin in the Shed Offline
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#51
29-09-2017, 06:47 PM
(15-08-2017, 08:54 PM)Ian Williams Wrote:
(15-08-2017, 08:44 PM)Charles P Wrote: February 1935. That blows them"1937" date for the extra holes out of the water.

Different foundries with different patterns?

Charles

Interesting Charles, I will dig out all the spare blocks I have to examine them to see if there is any pattern. I have also seen the matching drillings on some crankcases, I will be fascinated by what Tony finds as he obviously has a far larger stock of parts than I do. I guess this is purely of academic interest but I wonder why it was done, as I mentioned earlier I assumed it was to increase valve chest oil mist, however why would the drillings not be consistent???
I've got a crankcase here 209000 with matching holes
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Charles P Offline
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#52
29-09-2017, 11:49 PM
In my book the extra holes are solving a problem that didn't really exist.
The block im preparing is a nice screw in core plug one. Extra holes and their matching crankcases are on my "not wanted" list!

Charles
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