oldsarge

Just would like an explanation on these Holley numbers. I know that stock carbs for say a 64 was a 2818, dated like 302, model 4150. Now, when were these 2818-1 carbs made, dates are like 2828, why four numbers, are they still a 4150. Are these carbs the same and are the -1 carbs correct. I would like to know more about the 2818-1 carbs, please.

Donald #31176

Holleys w. 4 digit dates are service replacements made after 1972. Correct 2818 for 64 w. 365 Hp was a R2818A w. 3 digit date.

mstanton

Both the 2818 and 2818-1 are 4150s part number 3849804 and correct for 64 365s and 65 365s and 350s. The list number changed to the -1 during the summer of 64. Most 64's should be 2818 and most 65s 2818-1. The different date codes are a factory carb, 3 digit, or replacement, 4 digit. The 3 digit is year, month, week: 302= 63 Oct second week. The four digit is julian date, year. 2828= 282d day of a year that ends in 8.

midstyle

Example : L76 3rd week of November 1963.

64_365

As far as '64 L76's go, that depends on what you mean by "correct". Are they the same carb functionally? Yes
Will a 2818-1 on a '64 L76 result in a point deduction at an NCRS meet? Yes

A '64 2818 carb will only have four digits stamped into the metering block, no -(list) numbers. I have a '64 with a date code of 451, 1st week of May '64.

6T5RUSH

Curious about the 2818 I'm running. The 3 #s are 431. So, year, month, week, right? Thought the 2nd digit in your example would have been a letter. Do I read mine to be year: '64, month: March?, then week: 1st?

Thanks!

Jim
In God We Trust!

64_365

JohnZ

The second (month) digit in a 3-digit Holley date code is only a letter if it's a November (A) or December (B) carburetor; January thru October are 1 thru 0.

oldsarge

So two answers here, were they made in the sixties or the seventies. Anyone know for sure.

Subfixer

The way I read it, both.

3 digit dates in the early 60's (63-65)

4 digit dates in the 70's

oldsarge

I understand that the 2818, 3 digit date carbs, are from the sixties. But were the 2818-1 carbs also from the sixties, saying that there are some 2818-1, 3 digit dates, or are the 2818-1 all with 4 digit dates?

Subfixer

All 2818 should be 3 digit dates (produced between late 63 and late 64). 2818-1 could be either 3 or 4 digit dates. I have a 2818-1 on my car with a date of 482 (1964, Aug, second week). The Carb is not original to my 64. I'm thinking it was originally on a very early 65.

agump

My 65 carb is dated 533. I have seen replacements, with 3 and four digit dates.

I have an early 2818 dated on the opposite side of the air horn that is fully restored , will trade for feb or march early april 65 2818.

Lots of small differences in the various castings (originals and later versions) that comprise the 2818.

JohnZ

2818's and 2818-1's used in production in '64-'65 all had 3-digit date codes. Service replacements made through 1972 also had 3-digit date codes. Service replacements made after 1972 had 4-digit date codes.

Jim1965coupe

Guys,

Have a Holley R2818-1 with 3 digit date code 135. Makes no sense, right? The 2818-1 should be for a '64 or '65, yet this 135 code would indicate 1961 or 1971, when the 2818-1 wasn't used. Thoughts?

Thanks,

Jim

JohnZ

A "135" date code on a 2818-1 simply indicates a Service Replacement manufactured the third week of March, 1971. The 4-digit date coding didn't go into effect until 1972.

Jim1965coupe

Thank you John. Any idea what it is worth? It's an extra, so I'm going to sell it. It is unrestored and hasn't been in use for the last 17 years.

Thanks,

Jim

JohnZ

I don't follow pricing like that, but whomever buys it will take a 20% (8-point) originality hit in judging for "date". Value will depend on whether it works, whether it needs a rebuild, cosmetic condition, etc.

Jim1965coupe

Thanks John.