25-07-2019, 08:43 PM
I'm not sure it is the Ethanol that is the problem, as I believe its boiling point is 78 degrees C whereas a fair percentage of the rest of the fuel will have an even lower boiling point. You have tried most things but I wonder if you could reduce conducted heat from the manifold into the carb body by use of a tufnol washer ? I would suggest at least 3 mm thickness, and stainless bolts would prevent a bridging heat path via the fasteners. This is only based on surmise - I haven't actually tried this out but it has been standard fitment in more recent carburettor cars.
Today I went out in 30 C heat and had a few periods of hesitation and unhappy running after climbing a hill. This is the first time I have experienced this "on the road", the only previous incidents having been due to "heat soak" when restarting on a hot day after leaving the car parked for only a few minutes.
Today I went out in 30 C heat and had a few periods of hesitation and unhappy running after climbing a hill. This is the first time I have experienced this "on the road", the only previous incidents having been due to "heat soak" when restarting on a hot day after leaving the car parked for only a few minutes.