[Frank Catt]

David Morton got it dead right, and JP was well on the ball as well. The unit is in fact a cooling unit which I built to slip over the webbers as soon as the car comes off the track, and which stops fuel vaporisation from heat soak from the engine. We have seen a few carb fires when hot engines have been restarted due to fuel being boiled in the float chambers and expanding onto the butterflies, which ignites as soon as the engine is turned over to start, this simple unit has worked well and we have never had a problem since. Got a few of you thinking though ! Frank