Nos carbs.
Looking for information on the following CARBS.
Theses are nos holley carbs that i am trying to Find out if they are used in any class racing. This is not a for sale ad, information only. What we do not want to do is sell them as just nos carbs if racers van use them. List: 9834 Julian date 3037 8418-1 jd 961 4781-3 jd 1780 4781-2 jd 2712 3310 jd 923 3310 jd 584 4781-8 jd 2516 4781-2 jd 1758 4881-8 jd 2516 6210-3 jd 2554 Quick Fuel 585 Can someone tell me if this carb number is legal and used on a 1968 or 1969 big block camaro. Stock or superstock. Thanks for any help. It goes much deeper than you will know. |
Re: Nos carbs.
These are the only Holley #s I found in the NHRA Engine Blueprint Specifications.
1969 Chevrolet 400/427 3-2 Holley F&R R-3659A R-4055A 375/396 1-4 Holley R-4346A 425/427 1*4 Holley R-4346A 430/427 1-4 Holley R-4296A 435/427 3-2 Holley F&R R-3659A C R-4055A 1968 Chevrolet 375/396 1-4 Holley R-4053A 400/427 3-2 Holl F&R R-3659A C R-4055A 425/427 1-4 Holley R-4052A 430/427 1-4 Holley R-4054A 435/427 3-2 Holley F&R R-3659A C R-4055A |
Re: Nos carbs.
When you're unsure of the original specs, parts, or potential OEM application of a specific List Number Holley carburetor, you need the Holley Illustrated Parts & Specs Manual. Available as Holley part number 36-51-7, around 50 bucks from many popular locations (including the Big"A".
I'm sorry, mine's somewhere in storage boxes 500 miles away so I can't look them up for you. PS If your doing online shopping and it seems like the seller "SuperShops" has lots of Holley 'Group' stuff available, that's because it's.....Holley. |
Re: Nos carbs.
Thanks the info and the lead on how to find them going forward.
Much appreciated |
Re: Nos carbs.
Read pp.58-62 of this document -
https://www.nhraracer.com/Files/Tech...edProducts.pdf Also, from the Rule Book, Section 11A, page 3: "CARBURETOR Must be correct year, make, and model specified for car’s engine; fuel or air bleed passages may be resized. Drilling idle holes in primary throttle blades permitted. Other modifications prohibited. Sandblasting, grinding, flash removal, dry film coating, or any other modification to carburetors prohibited. Replacement carburetors permitted provided they are same model, type, throttle bore, and venturi size. Computer carburetors use latest model non-computer carb for engine application. " (Emphasis mine) |
Re: Nos carbs.
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engine; Year was eliminated years back. Model has been modified some. Example; Chevy's can now run a front fuel inlet Qjet instead of 90degree inlet as they came out with. Main thing they do now is measure butterflys, and Venturi's. |
Re: Nos carbs.
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From my 1989 Holley Illustrated parts and spec manual |
Re: Nos carbs.
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