440 breaking up at 5600 RPM
At my wits end, have a 440 10:1 flt top pistons 440 source heads with new comp 924 springs, Lunati voodoo cam, 494-513 Holley 780 street avenger carb with 75s front and 80s rear 1.6 power valve, new MSD pro billet dist. new msd digital 6al, new msd superconductor wires, new edelbrock fuel pump. (checked pressure running down the road holds 6psi) ran the Digital 6al ground straight back to the battery in the trunk, have the pos. running to the ford relay where the giant small strand 600 volt pos. battery cable runs to under the hood. I have a converted one wire Denso alt running to the same terminal. I have changed spark plugs from platinum to copper core and gapped at .035 made no difference, running a mix of Cam2 110 and 90 octane recreational gas (non ethonal) have the engine grounded to the K frame with 4 guage copper wire. All of these changes and no difference except when I went from 78s in the rear jets to 80s it seemed almost worse. Fortunately I live in the country so I was able to run the car up to the breakup point and shut it off to coast into the garage, then I pulled a plug, looks a little lean maybe? Car runs like a champ up to the breakup point. Yes I checked the rev limiter as well seems to be accurate. Anyone see anything wrong with my setup? Sorry about the wordy description just trying to eliminate some questions. Thanks!
![20160814_204510[1].jpg](https://www.forabodiesonly.com/mopar/attachments/20160814_204510-1-jpg.1714958436/ "20160814_204510[1].jpg")
At my wits end, have a 440 10:1 flt top pistons 440 source heads with new comp 924 springs, Lunati voodoo cam, 494-513 Holley 780 street avenger carb with 75s front and 80s rear 1.6 power valve, new MSD pro billet dist. new msd digital 6al, new msd superconductor wires, new edelbrock fuel pump. (checked pressure running down the road holds 6psi) ran the Digital 6al ground straight back to the battery in the trunk, have the pos. running to the ford relay where the giant small strand 600 volt pos. battery cable runs to under the hood. I have a converted one wire Denso alt running to the same terminal. I have changed spark plugs from platinum to copper core and gapped at .035 made no difference, running a mix of Cam2 110 and 90 octane recreational gas (non ethonal) have the engine grounded to the K frame with 4 guage copper wire. All of these changes and no difference except when I went from 78s in the rear jets to 80s it seemed almost worse. Fortunately I live in the country so I was able to run the car up to the breakup point and shut it off to coast into the garage, then I pulled a plug, looks a little lean maybe? Car runs like a champ up to the breakup point. Yes I checked the rev limiter as well seems to be accurate. Anyone see anything wrong with my setup? Sorry about the wordy description just trying to eliminate some questions. Thanks!