The BSA A7-A10 Forum
Technical (Descriptive Topic Titles - Stay on Topic) => A7 & A10 Engine => Topic started by: andy2565 on 26.05. 2010 18:06
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i just took a cam out of a spare da10 engine,and it has no numbers anywhere,is it possible to id it by the measurements,overall width of a lobe is 33mm,thickness 24mm,each lobe is slightly raised on one side,
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G'day Andy,
I might be wrong, but it looks like a 357. I have a few cams in the shed I will look at tonight.
The best way is to set it up in a lathe with a degree wheel and using a dial gauge work out the timing. 1 degree of the cam = 2 at the crank.
Cheers
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DA10 is a GF engine from 1958-on. According to Roy Bacon, the 1958 Flash was fitted with the 67-334 cam and the 1959-63 models had the 67-356 cam.
If you follow Muskrat's good advice, you can compare your measurements with Table 7, p.209, in Bacon's 'BSA Twin Restoration'.
David
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i'll buy the book then,ad try and learn how to dial a cam,cheers andy
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A very wise investment!! *smile*
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been to a few dealers and mates,this is different to all standard cams,could be one of the last maybe 358,but could be a one off race cam of a sort,
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G'day Andy,
now you've got to dial it up, you might have a piece of treasure.
Cheers
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be a while until i build the engine up,going to get the end feed job,i actually found a 1126 head amongst my bits,having the fins repaired now,as soon as i do i'll let you know.