Carb Guru's, I need some help.

[DartorDemon]

My duster is running a 360 w/ an edelbrock 1406 carb. I have a 7psi electric fuel pump setup because the magnum engine has no provisions for a mechanical fuel pump. However, i learned recent that 7psi was way too high for the carb and that they need 5.5psi at idle. So i bought a spectre brand dead head regulator that is easily adjusted to 5.5psi.

I started the car up and it didnt want to idle on its own for long. Even after warming up it stayed at about 500rpm and idled rough. So i adjusted the idle screw so it would idle smoother around 750-800rpm.

Then i gave the engine a quick revv and it doesnt even sound like a V8 even though it idles that way. I checked all my spark plug wires and started it/shut it off a few times and it dieseled once during these tests.

As you'll see in these videos.Startup:(still cold):
http://www.youtube.com/embed/IY0qQqaT1cQ
revving:
http://www.youtube.com/embed/dgmt3M9S21s
revving again, maybe a little clearer in this vid:
http://www.youtube.com/embed/6i_b8MGKw1I

Is it just a mixture screw issue and that the engine is too lean?

Note: Nothing else has been changed since i last drove the car. Only the added regulator and idle screw adjustment.

[sam 74]

if it ran fine before the regulator i'd say raise your pressure a little and see what happens, try 6 psi and go from there, did you check your float level yet?