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#81523 09/07/2007 3:09 AM | Joined: Sep 2003 Posts: 181 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2003 Posts: 181 | Okay, I won the bid and this is the description of what I bought...
"operable Carter YF carb, removed from a running GMC 270ci engine."
I need to get this to work on my 261 and my rochester B will be consigned to target practice!!!!
My first question is... Will I need to change the jets or anything else to optimize this for my 261? I was thinking that the CFM for a 270 should be very close to that of a 261, but I know zero about carbs, so???? I am hoping all I will need to do is clean it and kit it. Let me know.
Thanks,
David
The only thing more amazing than my ability to cram 60 minutes of work into a 9 hour day is my talent for making it look effortless! My 1962 Chevy C-30 | | |
#81524 09/07/2007 1:06 PM | Joined: Nov 2002 Posts: 2,766 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,766 | Oly - what is the carburetor identification number stamped on the center section? Should be either 3 or 4 digits, followed by the letter "S" as in (S)am.
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 | | |
#81525 09/08/2007 12:11 AM | Joined: Sep 2003 Posts: 181 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2003 Posts: 181 | I see a 2207 inside a little rectangular box underneath a big 'X' but that is all I can make out. and I do not see an 'S' after the number.
The only thing more amazing than my ability to cram 60 minutes of work into a 9 hour day is my talent for making it look effortless! My 1962 Chevy C-30 | | |
#81526 09/08/2007 5:59 PM | Joined: Nov 2002 Posts: 2,766 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,766 | Oly - ALL original equipment Carter YF carbs were stamped. A few early aftermarket YF's (mostly for the 216 and 235 Chevrolet) were not stamped, and identified by tag only.
G.M.C. NEVER used a Carter YF on the 270. Starting about 1966, G.M.C. did use a YF on some 250's and 292's.
Without knowing exactly what you have, I am guessing; but you may have one of the early aftermarket units which are unsuitable for either a G.M.C. 270 OR a Chevrolet 261.
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 | | |
#81527 09/10/2007 7:00 PM | Joined: Sep 2003 Posts: 181 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2003 Posts: 181 | I am just going by the pic on ebay...I have not actually received the carb yet. Hope to get it today.
The only thing more amazing than my ability to cram 60 minutes of work into a 9 hour day is my talent for making it look effortless! My 1962 Chevy C-30 | | |
#81528 09/10/2007 7:12 PM | Joined: Nov 2002 Posts: 2,766 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,766 | Oly - when you get the carb, look for the stamped number on the center section. Hopefully, it will be there, and one you can use.
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 | | |
#81530 09/13/2007 1:33 AM | Joined: Nov 2002 Posts: 2,766 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,766 | Oly - the 964s is a replacement for a Chevrolet 216. This carburetor should not be used on a 261 (unless you use 2 or more of them  ). 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 | | |
#81531 09/13/2007 2:02 AM | Joined: Sep 2003 Posts: 181 Wrench Fetcher | | Wrench Fetcher Joined: Sep 2003 Posts: 181 | Hey Jon,
How about a 3211? I am getting one of those in a few days...
The only thing more amazing than my ability to cram 60 minutes of work into a 9 hour day is my talent for making it look effortless! My 1962 Chevy C-30 | | |
#81532 09/13/2007 12:53 PM | Joined: Nov 2002 Posts: 2,766 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,766 | Carter YF carbs that are suitable (using only 1) for a 261:
4080
4085
4086
4339
4367
4368
4369
4370
4371
4372
4375
4376
4480
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 | | |
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