What is this Carter BBD port for?
I have this carb on my 318. Yes its a china clone of a Carter BBD. I think it's a "Super 6" carb? I could have bought the clone of the older BBD version which would have matched what I had originally, it has fewer ports. Any ideas which one works better on a 318?
Anyways, when I want a measurement of manifold vacuum I use port 4, otherwise it's capped. But when idling, if I remove the cap, engine RPM goes up a little. Should this port be routed to the nipple on the underside of my air cleaner? I've got nothing connected to it currently.
I have 3, 7 and 8 (and 4) plugged. 6 is not plugged but not connected to anything. 5 goes to the distributor. I'm wondering what 8 and 4 are for, and should 4 be open somehow because RPM goes up when its open.
I have this carb on my 318. Yes its a china clone of a Carter BBD. I think it's a "Super 6" carb? I could have bought the clone of the older BBD version which would have matched what I had originally, it has fewer ports. Any ideas which one works better on a 318?
Anyways, when I want a measurement of manifold vacuum I use port 4, otherwise it's capped. But when idling, if I remove the cap, engine RPM goes up a little. Should this port be routed to the nipple on the underside of my air cleaner? I've got nothing connected to it currently.
I have 3, 7 and 8 (and 4) plugged. 6 is not plugged but not connected to anything. 5 goes to the distributor. I'm wondering what 8 and 4 are for, and should 4 be open somehow because RPM goes up when its open.