moparcanuck
Deceased, But not forgotton
Stock 440 with a Six Pack setup runs great in the city and on the highway. But when you punch it, it pulls ok but it just doesn't seem to pull like a Six Pack. Suggestions?
Are the secondary diaphragms in good shape and opening fully?
on the suction side of the pump (between tank and pump)?Stock fuel pump. Fuel filter is on lower front passenger's side of block.
you can't, unless your on a chassis dyno and are watching them. if they're working properly you'll know it. make sure the vacuum connection at the center carb for the end carbs is connected to the tube coming out of the carb body.I ordered them from from Holley. As far as I know, they are opening fully but how can I tell?
on the suction side of the pump (between tank and pump)?
you can't, unless your on a chassis dyno and are watching them. if they're working properly you'll know it. make sure the vacuum connection at the center carb for the end carbs is connected to the tube coming out of the carb body.
X2, I had the same issues years ago with my 6BBl and it turned out to be low fuel pressure caused by the vapor separator. To much fuel was returning back to the tank, and the car would run out of fuel at the top end of the track. It would run fine, but just got real light on power.filter goes on the pressure side of the pump; between pump and carbs. i'm not sure about todays replacement fuel pumps. the hipo 440's had a special 8+lb pump. the lopo 440's and 383's had a 5lb pump. i've been under the impression that the 8lb pump hasn't been made for decades. you need to check the fuel pressure to see what you have. for me the 6-pak lazy syndrome has been the lack of fuel supply. check rubber connections at the tank for any kinks or cracks. i prefer the 3 valve carter pumps over the stocktype 2 valve pumps. also, heavy springs in the diaphragms will slow them down. factory springs for '69 carbs were purple and '70-'71 carbs had yellows.
Check the throttle cable to make sure its functioning properly and center carb is opening all the way.
I ordered them from from Holley. As far as I know, they are opening fully but how can I tell?