| |
Click on image for the lowdown. 
====
| | |
2 members (BC59, 1 invisible),
152
guests, and
3
robots. | | Key: Admin,
Global Mod,
Mod | | | Forums66 Topics128,088 Posts1,056,110 Members48,434 | | Most Online14,466
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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Jun 2015 Posts: 4 New Guy | | New Guy Joined: Jun 2015 Posts: 4 | Gents, can anyone advise if a carburetor for a 261 is the same as one for a 235?
Specifically, I have a 1960 235 and would like to possibly upgrade the carb to a slightly larger one. Can this be achieved by running a carb from a similar year 261? I've heard/read mixed reviews of the Langdon option, with some people saying its not a big enough carb for the 235.
I'm not looking to spend a ton of money, nor go to a dual carb set-up. More just looking for a semi-inexpensive solution that may provide a couple more hp on the stock manifolds.
Any input you can provide is greatly appreciated.
Kick it in the guts, Barry.
| | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | Yes. The 261 carb has a larger throat & venturi. It will perk up a 235. I had a 55 that had one on it a few years ago. You thought you were driving a V-8. They are hard to come by & have often been jugald around by "Remans".
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | Yes. The 261 carb has a larger throat & venturi. It will perk up a 235. I had a 55 that had one on it a few years ago. You thought you were driving a V-8. They are hard to come by & have often been jugald around by "Remans".
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Feb 2004 Posts: 29,795 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,795 | You will be trading off low speed and midrange performance for better full throttle. One of the effects of going to a carb with a larger venturi is a drop in velocity through the venturi and less, not more fuel is delivered due to the low velocity until the engine RPM is well into the cruising range. You will have to feather-foot the gas pedal to pull away from every stoplight to avoid bogging down and/or lean backfires. Top end will be better, however, but gas mileage will be terrible due to the power valve being open due to low manifold vacuum through most of the RPM range.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | |
|
|
| |
