Hey Guys,
I am having a difficult time with my 428. The timing is set to 32 degrees total and the plugs are a perfect light brown color. It will idle (very lopy) and if you gas it you get tons of power. I have about 6 pounds fuel pressure (measured). I have been to 4secondsflat.com and tuned my Speed Demon 750 with the instruction provided. This resulted in great pedal response. However at slow rpms (under load) or during braking the engine stalls. FYI - I have a Comp Cam 292/.560 (244@.50)). I am not sure at this point what the issue is. I called Barry Grant before ordering the carb and I went with this one as they suggested. The only thing I have not played with to much is the floats. Any help would be greatly appreciated.
--Mike