[TR] TR3 Aluminum Radiators

[Randall]

> I had my modified radiator (high efficiency core with no crank
> hole)
> recored about 10 years ago and am thinking about upgrading next time it
> needs to
> be rodded out.

I'm not convinced that aluminum represents an upgrade.  It does not conduct
heat as well as copper, plus isn't as strong so it has to be thicker.  It
also corrodes easier and is harder to repair.  

Its main advantage seems to be that it is cheaper.  If you already have a
usable modern copper core, I'd stick with that.  My old one wasn't usable,
but I went with a new copper one anyway even though it cost a bit more.

-- Randall