thanks. i put an air/fuel ratio gauge today to see where i am at. i am running really rich at idle to mid and just as the turbo begins to spool then it gradually goes to the extreme lean. i have a after market fuel pressure regulator to compensate for the added boost making sure there is at least 4 psi of fuel above boost psi as it progress (it always be 4 psi of fuel above boost pressure reguardless of the boost psi) so the boost won't push the fuel back into the tank. i am thinking to reduce the main jets and increase the secondary jets/rods. the carb i have is a modified (blow through. no choke) holley 750 double pumper.