PACMAN 25
Have you experimented with the lenght of the pressure line from the pipe to the tank??
This is what the late Ron Paris said about it......
"Did you know the longer the fuel line coming out from the tuned pipe the leaner you can make the midrange as the engine comes up to full power?
This is caused by the delay in time it takes the fuel tank and line to reach maximum pipe pressure.
Keep in mind that this tip should be used as a fine tuning adjustment on your motor at the track.
Experiment with different lenghts, between 10 to 17 inches is normal"
I have a SIRIO S12 EVO2, and as with all my previous engines I've used this tip with success. Every engine and carb is a whole new story.
Hope this helps.
AFM