Originally Posted by hobby28
I am not running a fuel pressure regulator and have raced for 10 years without one. The vent at the fuel cell is clear. The float level is good and the needle and seat appear free and in good shape. I don't have an isolator on the intake we a forced to run an aluminum carb adaptor from a performer eps intake to a 2 barrel rochester.
You should consider running a bypass regulator that will constantly circulate the fuel from the tank to the regulator. If the regulator is placed near the carb, there should be no problem w/fuel percolation.
I'm going to guess you are already using an insulator between the carb and intake. You could also try blocking the heat crossover under the plenum. Use a good quality mechanical fuel pump.