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Labor Day Putting down your wrenches or time for
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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Apr 2005 Posts: 2,832 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,832 | I have a question on multi carb chokes that the answer will probably be so simple I'll slap myself on the forehead and say "duh". There is a fellow that has a dual carb setup on his 235 that just one carb has a choke and with the plate fully closed it will roll black smoke and choke down. Why doesn't it just draw air through the other carb? I used to have a corvair (quit laughing) in the 60's and I used a carb syncronizer that fit down over one carb while you adjusted the other carb to maximum engine vacuum then switched to the other carb and did the same. As I recall it didn't cause the engine to choke down. Also had a 59 chev factory tricarb 348 that just the center carb had a choke, and a 54 vette triple side draft setup in an AD truck that just had one choke. Why does this work?
Evan
| | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | coilover,
You might slap me when you hear my take on the question. The carb that is closed on full choke is taking in almost pure fuel...little air. The other carburetor, which is open, is only flowing enough air for it...it can't double its flow to make up for the loss of air on the choked carburetor.
It is not as if the system is now working on one carb because one is blocked off..the blocked off carb is dumping tons of fuel without tons of air.
If this makes no sense, E-mail me a big old SLAP.
Stuart | | | | | Joined: Apr 2005 Posts: 2,832 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,832 | Gee Stuart; after rubbing the welt on my forehead all I can say is---Duh. Evan
Evan
| | | | | Joined: May 2004 Posts: 124 Member | | Member Joined: May 2004 Posts: 124 | Dont laugh about the corvair. I had one and I outran just about everything. I was dumb back then and I would road race on crooked roads as often as I could.Blew out a tire one evening right after I slowed down.Could have been killed. Wife and family to think about. Never raced again.
I like old trucks
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