Carb conversion rough idle and misfire

[Callump]

Okay so got a new “performance” non ballast coil on today. This allowed me to retard the timing down to 10~12° From the original “40°” at idle. The car runs much smoother now but still not perfect, rpm still hunts and sounds still slightly rough. A new fletcher su manifold arrived today and a 1 1/2 hs4 su coming soon. Hopefully this will fix my issues. Cheers guys for all the help.

[Callump]

catman said:

Don't forget that such a drastic change of the timing could mean that an adjustment of the carb will be needed. Have a try at slowly screwing the mixture screw in or out, when warmed up. It will probably make a difference.

Cheers mate, got the colour tune onto the carb today and got it running perfectly, but the Nikki carb has now sold and my new su arrived today. Even though it is now running well glad to have the su going on now much simpler and many more parts available.