by 1972nail » Sun Mar 22, 2020 12:03 pm
The smaller bore takes account of the pressure drop in the fuel line when the valves open. The smaller ones allow the mechanical pump to keep up with demand by smoothing out the pressure drop.
If you are using an electric pump you should have no problems with the bigger bore valves.
Editor of the VVOC Magazine ReVival
"When you have a Firenza like mine, who needs any Minis?" copyright David Maxwell 1979.