Because I have an inline 6, Ford 300, with a dual port intake, the front of the carb faces the v.cover on the passenger side. I am running a front inlet QJ, 17059272, and there is not room for the oem fitting/housing w.filter. What I have found with two autolite 4100's is that when I delete the oem screw in filter in the front of the carb, fuel gurgles past the needle seats. I have only 4.5 psi fuel pressure. No matter how the floats are set. Yes, vitron tips. I have tested with multiple needle seat combos. Two carbs. So, I conclude, the oem filter on the 4100 acts as a psi reducer/regulator. Yes, I know it should handle 4.5 psi. I know that most Holley's say they can handle up to 8psi. But...the 4100 can be run without the airhorn, and fuel is gurgling past the needles.
Question: Does the oem filter on the QJ also reduce fuel psi into the carb? I guess I would see signs of flooding if that were the case.
