geo65

the 65 327/365 motor call for a 2818 holley.

are the new units available identical to the original? (if not what are differences)

were the originals stamped List 2818 OR 2818-1?

ghostrider20

No they are not identical. If you are talking about off the shelf replacements. There may be a re-make of the original with original specs, and they are 500-600 bucks.

The bleed air passages on the top are large, and unique to that carb. You could find the size and have one fitted with that size. My off the shelf spare carb is a run of the mill 1850-3 and I had to drill a small hole in the front throttle blades for make shift bleed air. The problem is that not enough air passes without the throttle being open farther then designed at idle. When this happens, you uncover the transfer circuit slots which makes idle tuning impossible because you are pulling fuel from the idle and transfer circuit. The symptom for this is having idle mixture screws that do nothing and a rich condition at idle.

There needs to be an active and regulated idle circuit. Then a richening circuit (transfer slots) to "transfer" from off idle to part throttle. In stop and go traffic, putting around etc, this is critical for smooth operation.

The accelerator pump and nozzles provide this action as well, but mostly cover the dead spot created when you open the throttle. When you open the throttle, manifold vacuum goes to down, and the fuel condenses on the walls and floor of the intake. This shot covers that momentary lean condition.

The 2818 also has rear jets, and not a generic metering plate.

Mark

JohnZ

The originals were stamped 2818 in 1964, and 2818-1 in 1965 (photo below); don't know how they're stamping the new re-makes.

Dicecal

John, whats the "521" mean on the bottom? The one I have for my 65' says 0814.

Donald #31176

Holleys prior to 1970s were dated in the form yr/month / week. On the month code digits from Jan to Oct 1 thru 0 with Nov & Dec used the letters A & B respectfully.
521= 1965-Feb-first week

After 1970s (not sure of exact year) were dated with a four digit code.

Dicecal

Thanks!

JohnZ

0814 would be a service replacement, made the 81st day of 1974 or 1984 or 1994; Holleys made after 1972 used a 4-digit julian date code - first three digits are the day, last digit is the year.

ctjackster

Holley Date Code Chart:

Dicecal

Thanks JohnZ!

stall

Is there any way to enlarge that Holley date code chart. Old eyes not so good

piper

I believe that early 1964 and most likely 63 carb. had the date on the left side of the carb.

JohnZ

Early 2818's had the date code stamped separately on the passenger side of the choke air horn, opposite the LIST number and part number.

stensrud

I have a '64 365 hp with a wrong carb. After 23 years of ownership I have aquired both a 2818 and 2818-1 carb. After reading this I now know the diffierence and will go home tonight to see the date codes for them. I think the 2818 has a date of a month or two before the car build date, December of 1963, although the memory can get fuzzy after a while. Is there any good place to have one of these taken back to new condition? I could easily put a kit in them but I am really looking for the bodies to look more as new and I have never been able to make them look as good as they should be.

Thanks

65 vette dude

The new 2818 also doesn't have the threaded hole for the chrome vacuum advance line fitting to thread into. They have a small tube that comes out and bends down. I guess the idea is to run a rubber hose from the vacuum can directly to that tube. Either that or just cut the threaded fitting off the chrome tube,and run a short piece of hose from the end the chrome tube,to the little tube that comes out the side of the carb. That latter would certainly look closest to original.

53 Blue Flame Brett

Tough carb to get with correct date. Cores are $300 and up...and the date can still be an issue. Someone correct me but I believe that Chicago Corvette sells the repro 2818 carb. I would send mine to Holley for a rebuild and re-color.

ctjackster

there are a few places that CF members have used to have their carbs restored and / or rebuilt - I think stenrud is looking for a cosmetic restoration. The NCRS restoration guru is (was) Jerry Luck, but a search of the archives (if it works) will reveal that many CFers have had success with a handful of folks. I myself have another 2818 that needs to be restored, and I am probably going to send it to Jerry MacNeish - www.z28camaro.com

stensrud

Thanks for the information. I did look at mine last night and found that the 2818 has a date code of 3A3 which is about 4 weeks before the car was made so that's the best I can do and worth having the carb restored correctly. The 2818-1 has a date of 261, which means to me that (I think) it came off some car other than a 'Vette. My 1972 LS5 came with the quadrajet on it and I don't know if the '72 LT1's had holleys. It will take some time and the right resources to sort that out. I imagine that if a 261 date code was correct for some '72 car someone in the world would like to have their hand on it.

JohnZ

A 2818-1 with a 261 date code is a service replacement made the first week of June, 1972.

stensrud

I was afraid that was the answer but I was hoping the 2818-1 could have been used on something else in 1972. I'm just fortunate the 2818 has a fairly close date. It's been a while since I looked it up but my memory is that the car was assembled around December 17th of 1963.