400 carbs heating
Dorien,
I dont believe the carbs will get hot enough to vapourise the fuel , even
"down under " on the hottest day .
If the carbs are set too lean you will have lack of power , possible
coughing /spitting . If they are STD needles my guess is it runs too rich ,
as the jetting is set for pool petrol in the late 40's which was about 85
octane . You are probably now using 92 - 98 octane . What fuel consumption
do you get on a trip, if tuned correctly it should be between 26 - 30 mpg at
60 - 70mph. 400's on BOCA economy runs in the past have got up to 35mpg.
Even my D2 engine could acheive 28mpg.
Get the use of a mobile gas analyser and find out if it is lean?
The float level of the front starter carb has the fuel level set too low
when you follow the workshop manual .(the level is about 3/8 in lower than
the others)
I usually bend the fork up to almost straight to raise the level the same
as the centre & rear carb.
I believe the front float was designed for a side draft SU.
To open the bonnets will only make a very little difference to the temp of
the carbs or fuel .
Regards
Geoff
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