eot52

Corvette Black Book shows this carb as the 2nd design for a 1970 350/300 car.

My car has a birthdate of 6/24/70 and I have been told by NCRS people that this is the correct number for my car.

I have also been told (by a person that says he has the books) that GM engineering books doesn't list this number and it wasn't produced.

I am a novice when it comes to C3's and just want to get to the bottom of this.

Does anyone have one or has anyone ever layed their eyes on the numbers on the carb itself?

NCRS Members, please feel free to chime in here. I need to know.

MelWff

You can email Lars for a more up to date document but on this version he does not list that carburetor number.

http://www.corvettefaq.com/c3/QJetTuningPaper.doc

eot52

Thanks for that info.

lars

The Delco/Rochester Parts "C" Bulletin published November 1980 (which is the master carb listing and spec/parts list for all Rochester carbs), does not list the 7040212 carb number, neither as a production carb or as a crossover to any other number as a booking number.

If anyone has a copy of the actual Bulletin 9C spec sheet for the 7040212, I would really like to have a copy of it so I can document the actual configuration and application of this carb number.

Lars
V8FastCars@msn.com

Easy Mike

Do you have the 1970-72 NCRS Judging Guide? It may address the 212. I have a copy but will not be able to take a look until this evening.

Are you intending to have your car judged? Which carburetor is on the car now?

63vette427

The NCRS Judging guide show the 7040212. It's for a 1970 300 base Automatic. It says that it's a 2nd Design, ECS indicates Corvettes equipped with Evaporative Emissions Control Systems..

Revi

In 1970 ECS(NA9) would only have been installed/required on vehicles originally sold in California.

eot52

No I don't. Thanks for checking it out for me.

eot52

So if mine didn't have ECS, am I to assume it had the 7040202?

Revi

I would say yes.

MelWff

according to this 7040202 is for Chevelles and Camaros

http://www.lbfun.com/warehouse/tech_...ng%20Paper.pdf

Revi

7040202 is correct for a 1970 base engine Corvette with automatic transmission.

http://corvettec3.ca/carb.htm

eot52

That's what I have so I'm going to assume I have the correct carb.

Thanks everyone for your input.

lars

I'm aware that the NCRS shows the carb, but NCRS is not the original source for the information - they are second-hand, and got the info from somewhere... I also know the carb number exists, because I have seen them and rebuilt them. But there is no GM-sourced hard info on that number: The Delco Parts C Bulletin is the authoritative original listing of all Rochester carbs and part numbers, along with the Booking Number crossover sheets published by Delco. The ...212 number does not show up anywhere. I'd like to see the Delco/Rochester Bulletin listing for that number, but in several years of sourcing for the info, nobody has ever been able to show me the "real" documentation for the number, including other hard-core carb guys like me who have been hoarding original hard info and collecting stuff for 40 years. The Rochester "C" parts bulletin listing lists carb numbers 7040206, 7040207, 7040208, 2040213, 7040221... it skips ...209, ...210, ...211 and 7040212, and there are no numbers from ...214 until ...221.

If anyone has "real" documentation on this carb number, I'd really like to see it (the NCRS is not the original source, and the fact that it's in their "book" does not mean anything without factual original source backup).

Lars

Easy Mike

Correct.

Also correct.

Peterbuilt

That carb number is on page 4 of the 1970 Corvette listings.
http://www.gmheritagecenter.com/gm-h...tion-kits.html

lars

That's my point: The carb number just keeps showing up on random secondary "lists" as being an OK number for a Vette. I have no doubt that the number exists (I've seen them and worked on them), and I really don't doubt that they were used on Vettes. But where is the primary documentation from Rochester/Delco with the 9C Bulletin to show the 64 part numbers in the carb, the actual application, and all the specs? Where is the primary documentation for this carb? If anybody has it, please send me a copy..!

Lars