I'd be more inclined to have the blocks bored out. Larger journal = more
bearing surface = less wear.
What do you go through more of, blocks or cams?
Would also guess the cam journals are hardened along w the rest of the
surface of the cam, while the blocks are not...
iii
Brad Kahler wrote:
> Amici,
>
> While looking through our pile of good cam cores for Susan's spitfire we have
>found we have a lot of the large journal cams that were used in the mk1/2 and
>1500 spitfires.
>
> I know it is technically feasible to turn the journals down. We have a Paeco
>cam in the box that was originally a mk1 cam that has had the journals turned
>to match the small journal cam. However since its a Paeco cam we aren't going
>to use it.
>
> Susan talked with Iskey yesterday and they said they could do it but
>apparently they have had very few requests to do so.
>
> Myself, I can't see any technical reason not to turn cam journals down.
>However I'd feel more comfortable doing so knowing that others have done it or
>would recommend it.
>
> Thanks
>
> Brad
> 1957 TR3 vintage racer
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