With any blow through situation the regulation of fuel pressure becomes more and more important. Think of it this way, if you run your carb NA at a typical 7-9 psi that is perfect because there is no resistance. Once you add boost you need enough pressure to overcome the resistant force of the boost or the fuel can't get out.

The solution is generally easy enough, boost reference your pressure regulator and make sure you have a pump that can handle providing volume at the higher pressure.



-Tim