low speed needle should be flush with carby housing and hi speed needle out 2 turns once engine starts let it idle and pinch the fuel tube right near the carb engine revs should rise before stalling if it dies immediatly its too lean once this is right run the car so that it has crisp accelleration and is blowing a little smoke it should return to idle smoothly. If you are running in on breakin fuel use a hotter plug set the low needle as above but run the hi needle richer once run in use a colder plug and 16% nitro fuel good luck