Ya it could be the impeller in the fuel pump is clogged or worn not enough volume but good pressure could be the floats are set to low and the pump wont keep up to the need 4 fuel

Well, as an update. Pulled and drained both tanks. Had them pressure checked, they're OK. Pressure checked tohe pickup tubes and all fuel lines, they're fine. Replaced the faulty filler neck hoses that were a serious gas leak on the port side.

Shoulda taken a pic of all the oil that was under the rotor in the ignition. Changed out the cap/coil/rotor (HEI unit), and dizzy was full of oil! Cleaned it all out, coil looked pretty bad. Is there oil in these HEI coils? If so, problem I think found, if not, Hello new dizzy!!

Starts up and runs much better than it did. We'll find out this weekend if the problem is solved. I'm leaving the old pump in place, bringing the new one along JIC, but I don't think that's the issue.

Anyone got a good BBC Unilite? 

Ray

Hence why I dislike HEI units. Hopefully all runs well and the pump is fine. It seems to be, still holds pressure just fine. We'll see what it does under load........

Ray

Yeah I know. Wasn't that excessive, but enough to let me know the dizzy probably needs replacin'. Gonna take a mag with me anyway, JIC. (Only other BBC dizzy I own).

Ray

Well, seems MUCH better. Found out some things here yesterday with it. I think Skip mighta nailed it that it needs a pressure regulator. The problem persists now ONLY when you lift! Some pics will pop up of N8 and I racing , well more like N8 repeatedly handing me my ass, but was fun and my intention was to run the dog piss out of it and see where the problem lies. (Which we did! Ralph said it sounded like we were trying to break 'em, I actually drove through N8's roost at one point, THAT HURTS!!!! )

Come out of the gate with your hair on fire, hits 4700 RPM (New tach), will stay there all day if you let it with some lil hiccups and sputtering sometimes. Lift AT ALL, you'll never get it above 3000-3500 without it dying. Stop, idle it or just float it a few minutes, flatfoot it again, will hold 4700 again all day long.

Ralphs answer, "Then don't lift Dummy!"

Ray