Straight Six
Well-known member
Found an interesting page with carb info pretaining to sixes----tght people might like to check it out
http://cars.rasoenterprises.com/Carburetion.htm
"In case anyone is wondering, when I was thinking about a performance upgrade for my car several years ago, I also considered the Super Six route (using the Carter BBD 2bbl), the Holley 500 CFM 2bbl, and Holley 390 4bbl. There was no Proline Fuel offering dual 2bbl Webers and Doug Dutra hadn’t yet made the reproduction Hyper Pack intake manifold. I decided in the end that the 625 CFM Carter AFB was what I was going to try because the primary barrels had approximately the same flow capacity as the BBD and the air valves on the secondary barrels would allow more air if required. Setting up the metering rods and jets seemed to be more straight forward that the jets on the Holley 390. It also helped that someone had a scrap AFB lying around that I could have for free. After thoroughly reading the Direct Connection Slant Six Racing Manual, I was concerned about fuel distribution with the 4bbl carb. I decided to machine a new baseplate to mount the carb sideways with the throttle shafts parallel to the engine. From what I can tell from the spark plugs, my fuel distribution seems to be symmetrical and none of my cylinders run rich or lean. I have also eliminated the bog I used to have on left turns by raising float level. The AFB also gave me better gas mileage than the original Carter BBS 1bbl carb. "
http://cars.rasoenterprises.com/Carburetion.htm
"In case anyone is wondering, when I was thinking about a performance upgrade for my car several years ago, I also considered the Super Six route (using the Carter BBD 2bbl), the Holley 500 CFM 2bbl, and Holley 390 4bbl. There was no Proline Fuel offering dual 2bbl Webers and Doug Dutra hadn’t yet made the reproduction Hyper Pack intake manifold. I decided in the end that the 625 CFM Carter AFB was what I was going to try because the primary barrels had approximately the same flow capacity as the BBD and the air valves on the secondary barrels would allow more air if required. Setting up the metering rods and jets seemed to be more straight forward that the jets on the Holley 390. It also helped that someone had a scrap AFB lying around that I could have for free. After thoroughly reading the Direct Connection Slant Six Racing Manual, I was concerned about fuel distribution with the 4bbl carb. I decided to machine a new baseplate to mount the carb sideways with the throttle shafts parallel to the engine. From what I can tell from the spark plugs, my fuel distribution seems to be symmetrical and none of my cylinders run rich or lean. I have also eliminated the bog I used to have on left turns by raising float level. The AFB also gave me better gas mileage than the original Carter BBS 1bbl carb. "
