86 b150 slant six carb question
Thread Starter
|
Registered User
Joined: Jan 2014
Posts: 2
Likes: 0
86 b150 slant six carb question
Got a sweet little b150 with a slant six single barrel in it. I don't really know crap about single barrel carb. choke isn't working at all and i don't see how to install a manual choke on it. really need choke working in this crap single digit weather here in ky. thanks for the help.
Veteran
Joined: Dec 2012
Posts: 355
Likes: 6
From: Chi - west
Record Breaker
Joined: Dec 2005
Posts: 1,412
Likes: 2
From: Nashville
If I recall correctly, there is a 2-barrel carb for that era of /6 making it a super /6 or known as the s/6. If makes the engine easier to press the pedal to move the van and it got BETTER mpg too. Can't remember if the carb was the Carter or not. It;s been years. I do know it's an easy swap. I did that in the 80s.
Just take a look at the intake manifold where the carb sits to see if the swap can happen. I do know on some of the older /6 engines an adapter plate being 1-1/2-in high was used.
Just take a look at the intake manifold where the carb sits to see if the swap can happen. I do know on some of the older /6 engines an adapter plate being 1-1/2-in high was used.
Last edited by stev; Feb 12, 2014 at 11:34 PM.
Registered User
Joined: Jun 2013
Posts: 1
Likes: 0
I do not recommend trying to fit a two-barrel carb to your van; replacement of the intake manifold is necessary and you will likely break multiple studs and/or bolts trying to remove it and then end up with a driveway full of useless.
My Valiant has a one-barrel slant six and the choke mechanism is about as simple as simple gets: there's a pocket on the exhaust manifold in which a bimetallic spring sits and measures the engine temperature, with a rod going from the end of the spring to the choke plate on the carb, as well as some cams with steps and slots and connecting rods for maintaining air flow and stepping down the idle speed as the engine warms up. When the engine is cold, the spring is contracted and pulls the choke plate closed, then it expands and pushes the plate open as the engine heats up.
All adjustments to the system are accomplished by bending the rods to the proper length. They key is to make sure that the choke closes completely when you prime the throttle with the engine cold, and that the choke opens fully when the engine is warm. Problems will typically be related to binding in the linkages/rods/cams, or a broken spring. Mine is an early '60s setup and is completely mechanical; later engines might have an electrical heater to help the spring unwind or vacuum thingies to pull the plate open sooner than otherwise.
Fitting a mechanical choke should also be quite straightforward. Let me know if you need me to post some photos, and good luck.
Best Regards,
Rob
My Valiant has a one-barrel slant six and the choke mechanism is about as simple as simple gets: there's a pocket on the exhaust manifold in which a bimetallic spring sits and measures the engine temperature, with a rod going from the end of the spring to the choke plate on the carb, as well as some cams with steps and slots and connecting rods for maintaining air flow and stepping down the idle speed as the engine warms up. When the engine is cold, the spring is contracted and pulls the choke plate closed, then it expands and pushes the plate open as the engine heats up.
All adjustments to the system are accomplished by bending the rods to the proper length. They key is to make sure that the choke closes completely when you prime the throttle with the engine cold, and that the choke opens fully when the engine is warm. Problems will typically be related to binding in the linkages/rods/cams, or a broken spring. Mine is an early '60s setup and is completely mechanical; later engines might have an electrical heater to help the spring unwind or vacuum thingies to pull the plate open sooner than otherwise.
Fitting a mechanical choke should also be quite straightforward. Let me know if you need me to post some photos, and good luck.
Best Regards,
Rob