Technical questions

[Bob Culver]

Some observations on carb icing may be of interest. Javelin cars have the carbs bolted direct to the top of the heads with the exhaust remote on the other side and the engine is forward of the radiator. The carbs have small venturis and are subject to very strong suction pulses so atomisation is thorough and very prone to icing. Occurs in damp conditions (ie fog) at low temps above freezing (which dries the air). Around town shows up as stalling etc as a sheet of ice on the butterfly blocks the transfer outlets. On the open road very high consumption (due choking), lack of power, may stop, and often the throttle locks open! I imagine an SU would be very confused. If sit in the car pondering the external ice melts and there is no clue as to cause.
It is easy to partially blank off a Seven radiator so the air passing throgh is more heated.