Hi Rhys, unaware of filter in base of carb, can’t find reference to it on line,
more info please.

Thanks Nick

It's a small gauze one in the body of the carb where the small bowl on the bottom of the fuel tap is.

Help,advice please. Despite my best efforts my engine bay is still getting too hot, I am thinking of a fake filler cap to act as a chimney, possibly vented to stay in place or removable when racing, I had also thought of fitting a 12V computer fan on the underside to shift air out. The idea would be to switch fan on when static & off when moving.
Any comments Ideas appreciated.

Cheers Nick

Dennis Thomas' latest video shows him adding mesh to the boot lid to stop overheating.  It starts at 15:44,  two panels in the top of yours would help .

https://youtu.be/Ytv9OZNkLOs?si=gMhYWdAsuYbOf-ET

I solved that problem by ducting cooling air from outside into the suction fan built into the starter mechanism.  You have to ensure that the engine is not sucking in hot air from the engine compartment.

It's not an uncommon problem here in the UK, not one too much in the states as folks there build so that the hot air gets out. Remember that heat rises, so ducts underneath don't help much, and you also have exhaust heat to deal with, and on top of all that hot air expands, so you need quite a bit more escape vents than intake. Equally, get your aair for the carb from outside.
One thing we did have to  do with the Mercedes which used a stock tank was cool the fuel, it was boiling in the tank. That's why I use a remote tank ever since.

Help,advice please. Despite my best efforts my engine bay is still getting too hot, I am thinking of a fake filler cap to act as a chimney, possibly vented to stay in place or removable when racing, I had also thought of fitting a 12V computer fan on the underside to shift air out. The idea would be to switch fan on when static & off when moving.
Any comments Ideas appreciated.

Cheers Nick

My Bugatti uses a computer fan under a fake fuel filler hole.   It’s assisting the natural rise of the hot air.  I got the idea from Geoff May who used them on his real Austin 7 I think.

The various metal plates around these engines are important to keep the blown air passing through the fins.   They look naff and often get removed.

Hi Rhys, thanks for your reply. Rhys I have ducting taking outside air to engine fan, also have outside air ducted to carburettor. I had not thought about fuel tank is it worth insulating with foil?

Cheers Nick

hi Nick, getting the air out is almost more important than in. Personally I would move the tank elsewhere, and as Stefan says in it's place put a plate to keep air over the fins.