grandas_shed wrote:do fitting bike carbs make any difference to the fuel consumtion?
Not always, but there are so many technical and mechanical things that will effect fuel consumption (hundreds if not thousands) from one car to the next you can never tell.
Unless you run the same set up as someone else where you already know the results (even then your car will still run differently).
However as a rule your fuel consumption will increase, but bike carbs are normally more fuel efficent than twin 40s and alot more reliable.
Po79.