The Stovebolt Site Forums The Shop Area Engine Shop Rochester BC Choke

I've got a '50 3100 with a '55 235 out of a Bel Air. No carb on the engine when I got it. I stuck an old Carter on with a manual choke. I just picked up a rebuilt Rochester BC carb cause I want an auto choke. On the carb is a round housing with a "Rich" "Lean" adjustment plate. In the center of the plate is a flared tube connection. I need to know where the tube connects to and where I can find a tube or what size it is so that I can make one. Sorry but it's been way to long since I messed with one of these. Can't find any pics in the manual. If someone has a pic it would help a bunch. Thanks

The tube connection is where the heat "stove" pipe would connect to a piece of metal on the exhaust manifold.

Here's what I asked on it a couple of months ago with my BC carb .

Brad

One of these "universal" choke stoves will work if you need one.

The tube needs to be where it gets really hot. The hot air pulled in through it backs the choke plate off. With out heat, the choke stays on. The universal kit wraps around the exhaust manifold. V8's have a tube running into the exhaust crosser port under the intake runners making a loop with fresh air pulled in from the air filter housing. With out the factory intake with the tube ports, the exhaust manifold is next best heat source.

The hotter the air, the faster the choke backs off.

Joe

OK, so I know its been 10 months since I asked this question but things have been quite busy and I've driven the truck very little. Anyway, I've got the choke stove on. The kit had a clamp and a "cup" with a hole in the end that I clamped to the exhaust manifold. Aluminum line goes into hole where I assume the heat builds in the cup and is transferred to the choke plate. Seems I can't get the choke to work correctly. The '55 manual says "Rotate choke cover until choke valve barely closes when the air horn is wrapped lightly". Does "barely closes" mean when the valve begins to move from fully open position or just before it completely closes? I set the thing to where the valve was just fully closed. This thing is really running rich so I suspect either I don't have the stove set up correctly or I've adjusted the choke wrong. Any advice? I'll try and attach a pic. Thanks. http://s157.photobucket.com/user/jss1956/media/IMG_0797.jpg.html?o=0

Make sure you are getting vacuum at the connection going to the choke stove. Disconnect the tube & put a finger over the out let. You should feel a little suction with the engine running. If not a passage is plugged up or a gasket leaking.