As I remember ther was no difference in materials between the early and late
cranks
but, the later parts are cross drilled on the rod throws and thus a much better
part.. Nitride hardening the crank will give about a 50% increase in strength.
There is a little system to follow in doing this and if you actually intend to
do
this contact me and I'll fill you in on how I did (for years). If you are not
going
to spin the motor don't bother with the effort.
Kas Kastner
Bob Lang wrote:
> Hi All...
>
> Great topic.
>
> I have a question though, and I suspect Mr. K can provide some insight.
>
> Early TR6's use a different crank than the later ones, I have no idea
> what the cutover engine number was, but I suspect it was CC50000... at
> any rate, folks refer to this crank as a "long snout" unit.
>
> The question is, is a long snout crank inherently any better or worse for
> one of the mega RPM applications? Or does it matter?
>
> I was told by a TR250 Autoxer named Jeff Janick that long snout cranks
> are better, and then subsequently realized that they are also made from
> "unobtainium" when I started to look for one. As luck would have it, at
> least one of these has become part of my "collection", and I figured it
> would be nice to know this info for the inevitable "phase two" motor that
> I'll probably be building in the next calendar year or so.
>
> Wow. 8000 RPMs with a TR6 motor. Koool!
>
> rml
>
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