Weber IDA 48 info. needed

[priobe]

I would like to find out if most of you set your fuel pressure when the engine is warm or when it is cold. Fuel pressure fades after motor gets warm

Also,

I have made some changes to my setup and would like to know your thoughts.

My current setup:
37 choke
air holder 120
idle jet 65

main air 210
emulsion tube F16
main jet 165
bypass 55

Timing - 17 degrees
MSD - 1 silver (light) & 1 blue spring -- bushing - blue (21 degrees)

Fuel pressure regulator (Holey Light pressure) 3.0 psi cold
No return line

Engine runs 85 % Good, has a stumble between 2200 - 2800 RPM

Spark plugs gapped @ 40 thou.

When you pull the spark plugs they still rich (black carbon dry).


Here are some of my other findings:

choke 40 ( much better engine response)
60 idle air holder (120 too lean popping though the carb)
60 jet
F16 emulsion tube

I am tempted to try an drilling out the idle jet holder to 80 or 100 but many people do not suggest this?

Any thoughts

Btw- spark plugs are still rich