I need to ask you guys that know engines better then I do, I have a 440, believe its a mid 70's quite possibly from a motorhome, not sure just have a feeling it is, not sure of the internals although I was told when I bought it that it is a 440, 030 over bore, closed chamber heads, mild cam, not sure of what it is just told its a mild cam, Edelbrock intake and 750 Edelbrock carb, it has a fuel regulator and a large electric pump under the tank plus a mechanical fuel pump on the engine, stock cast performance exhaust, more then likely stock heads, they are cast also, I have been told by a mechanic that has worked with hotrods all his life that he suspects it is higher compression, 11:1 or higher, again a guess. I have tried using high octane gas and also used octane boost while it helps it still knocked once it gets warmed up and have now installed a Snow Performance water methanol injection that really does help and now no more knock but now when you get your foot into it hard it seems to be starving for fuel and will almost bog and actually died on me once, now when I feel this happening I have turned on the electric fuel pump for a couple seconds and all is well again. Now my question to you is this, is the mechanical fuel pump going or do I have a small leak somewhere, when the Snow Performance water methanol kit was installed you have to put a spacer plate in that has a port that you thread in a nozzle to spray the water methanol or windshield washer fluid into it. The electric pump can't be left on all the time as it pumps too much fuel and can't be regulated properly it is just used to start the car after it has sat for a few days and loses its prime, it has always done this so nothing different here. So what do you guys think could be the problem, sure would like to have it reliable and not doing this, thanks for any help and advice. Here is a picture of the engine too.
