400 carbs heating
Well now Dorien, as you assure us that the cooling system is on the top
line, and I presume that you have the correct gaskets fitted between the
head and the carburetors, then there is another reason for this problem. If it
was a known fault with the 400 then other members would be reporting the
same thing, however, there is not an outcry from other members.
So, you say that you use a very low grade petrol, this could be slow
burning and building up a massive heat sink in your manifolds which then causes
heat to rise to your carburetors. I have seen certain other cars running at
night with their manifolds glowing, so there are two things to try, first
change your petrol to a higher octane one and second check that you are not
running with retarded ignition. You did say it was running very smooth
which leads one to think it could be retarded, we will wait and see.
Good luck, my regards,
Bellerophon
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