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| | | | Joined: Sep 2004 Posts: 241 'Bolter | | 'Bolter Joined: Sep 2004 Posts: 241 | Would a Carter YF 4371S be OK to use on a 235 CID? I know that they were originally made for 250s and 292s. Just inquiring for a friend. I'm not sure.
Thanks. | | | | | Joined: Feb 2004 Posts: 29,792 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,792 | That one will probably run a little lean on the smaller engine- - - -not enough venturi velocity to mix enough gasoline with the air passing through. You might richen up the main jet a little, but it would be a better choice to stick with the right carb for the engine.
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!
| | | | | Joined: Sep 2004 Posts: 241 'Bolter | | 'Bolter Joined: Sep 2004 Posts: 241 | I agree with using the correct carb on these engines. I think he's looking to use what he has at this point to get the truck running. Thanks Jerry. | | | | | Joined: Feb 2004 Posts: 29,792 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,792 | I did something similar when I was back in high school. I had a 47 Ford coupe with a flathead V8, bored 80 thousandths oversize. That turned a 239 cubic inch engine into a 252. I installed a 2-barrel carb for a 55 Ford 272, and got a horrible flat spot on acceleration. Even with drilled-out main jets and lousy gas mileage, the bog just off idle just wouldn't go away. I had to nurse the RPM up a little at a time to get up to the point I could nail the throttle. It ran pretty good once the engine was wound up, but getting there was a challenge!
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!
| | | | | Joined: Nov 2002 Posts: 2,766 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,766 | While I completely agree with Jerry about lower air velocity on O.E. carburetors, this one is not O.E.
Carburetion 101 - the three major methods of helping atomize fuel are: (A) heat, (B) higher air velocity, and (C) throw more fuel at the engine.
Carter released the 4371s for replacement on standard transmission 230, 250, and 292 engines. These "one size fit all carbs" are generally calibrated much richer than O.E. carbs (see "C" above).
It should work, albeit not as well as one designed specifically for the 235. And fuel mileage will probably not be good.
Jon.
Good carburetion is fuelish hot airThe most expensive carburetor is the wrong one you attempt to modify. If you truly believe "one size fits all," try walking a mile in your spouse's shoes!The Carburetor Shop | | | | | Joined: Sep 2004 Posts: 241 'Bolter | | 'Bolter Joined: Sep 2004 Posts: 241 | California gas prices are horrible. He may have to bite the bullet on poor fuel mileage with this carb for a while. | | |
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