As I understand it, the older carbs didn't like more than about 3.5 psig. If the fuel pressure is too high, it will push the needle off the seat and fill the carb with gas, which will eventually spill over into the engine.
You might want to consider a Spectre 2517 from Summit Racing.
Last edited by starkweatherr; 07/09/2008 2:17 PM.
