Next little bit of work on the Spitfire done.
There's a bit of an issue with overheating and subsequent cavitation on both the stock Lucas pumps on the Triumph PI system and the Bosch replacements that a number of companies sell.
So, this is the beginnings of my solution. I've cut a little patch out of the rear of the car and welded in some mesh where there should be a low pressure recirculation when the car's at speed.
I've also done a similar thing to the rear face of the axle tunnel which will hopefully be a higher pressure area when the car's in motion.
The net effect of this should be a flow of air over the pump which will be mounted on the boot floor and covered in a box, thereby keeping it cool.
For extra cooling, and cooling while stationary, I'll put a cooling coil in the pipe feeding the pump, and underneath that mount a small 12v electric fan pulling air up through the floor of the boot, cooling the fuel and thus cooling the pump.
The little fan will be wired into the radiator fan at the front so it should only cut in when it's stationary in traffic or running extra hot. Also, by mounting it away from the other vents the fan won't block any airflow when the car's moving :) #Spit6