440 six pack high idle
Im working on my sixpack setup right now too. Heres an honest truth about most sixpacks.
They’ve all been fiddled with or touched at some point.
Most notoriously is the fuel distribution plates inside the outboard carbs. Notice how they do not have metering blocks? Under the bowls of each is a factory tuned plate with a precision drilled holes at the bottom. These essentially act as “jets” but are not really meant to be messed with. Well guess what? Most “Shade tree guys” end up drilling those out “a size up” to compensate for power adders they’ve put on the motor. A good tell tale for this is light scoring in the channels through the bottom holes where the drill bit went. Not only did they affect the primary circuit but these plates also feed the idle circuits from the same holes!
Your best solution to this is the Promax Jettable plates above. they replace the Original holley ones that came in these carbs. They aren’t terribly expensive either.
Like mentioned above the promax rear base plate is also worth the money. It turns the tuning needles out at a 45° angle so you can tune the rear carb without having to remove it. Here i have it mounted on the front flange for picture purposes but it is made for the rear carb so you can get to the screws.
Edit: I noticed i posted a picture with the throttle shaft and butterflies installed incorrectly. Yes i fixed this. Classic case of too excited and slapped it together.
I realize this is long winded but honestly sixpacks require it.
Im working on my sixpack setup right now too. Heres an honest truth about most sixpacks.
They’ve all been fiddled with or touched at some point.
Most notoriously is the fuel distribution plates inside the outboard carbs. Notice how they do not have metering blocks? Under the bowls of each is a factory tuned plate with a precision drilled holes at the bottom. These essentially act as “jets” but are not really meant to be messed with. Well guess what? Most “Shade tree guys” end up drilling those out “a size up” to compensate for power adders they’ve put on the motor. A good tell tale for this is light scoring in the channels through the bottom holes where the drill bit went. Not only did they affect the primary circuit but these plates also feed the idle circuits from the same holes!
Your best solution to this is the Promax Jettable plates above. they replace the Original holley ones that came in these carbs. They aren’t terribly expensive either.
Like mentioned above the promax rear base plate is also worth the money. It turns the tuning needles out at a 45° angle so you can tune the rear carb without having to remove it. Here i have it mounted on the front flange for picture purposes but it is made for the rear carb so you can get to the screws.
Edit: I noticed i posted a picture with the throttle shaft and butterflies installed incorrectly. Yes i fixed this. Classic case of too excited and slapped it together.
I realize this is long winded but honestly sixpacks require it.
