motorcraft 4300 carb info

[SSDiv6]

Originally Posted by Tom Goldman

Jeff, the problem with 7# and up of fuel pressure only is an issue when running the oem style secondary needle and seat. ....Not an issue when running only a larger primary needle and seat. .....Tom

In the past, I have used the Grose-Jet needle and seat assembly which allows you to run higher fuel pressures without flooding the engine.

They are similar to this picture:



I cannot remember if Jeff Lee tried them ion his carburetor in the past. I have succesfully used them in many foreign car applications, Quadrajets and Webers, allowing me to run higher fuel pressure without overriding the float.