My annual pilgrimage to the Goodwood Revival last weekend – and as every time before myriad fascinating snippets about the cars, as well as some of the best motor racing on the planet.

And this year’s top snippet?

FN manifoldLook at the photo on the left.  Lots of fins on the manifold, obviously to dissipate heat.

Well, no, actually.

This 1936 Frazer Nash runs on methanol, which has such a high latent heat of vapourisation that getting heat into the fuel is a problem.  So it is suspected today that maybe these designs were as much about getting heat in as about getting it out.

So everything isn’t always as it seems.  (and many thanks to the owner for spending time to discuss the minutiae of the car, including the remarkable gearbox for a four speed chain drive transmission!)