What Carburetor do I have - Team Camaro Tech
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post #1 of 10 (permalink) Old May 4th, 11, 01:20 PM Thread Starter
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What Carburetor do I have

I have searched with no luck so far in trying to figure which Holley carburetor that I have.

The only numbers on it are 6R 3752 / P-46 / 11038 / 6C8 all in different locations on the carb.

Any help would be greatly appreciated







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post #2 of 10 (permalink) Old May 4th, 11, 05:10 PM
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Re: What Carburetor do I have

4150 750cfm double pumper with mechanical secondaries.
Look on the front somewhere and see if it says something like 4779.

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post #3 of 10 (permalink) Old May 4th, 11, 05:17 PM
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Re: What Carburetor do I have

I think the 4779 series has a choke horn and choke assembly Joe. This one looks factory without the choke horn, maybe one of the HP series...

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post #4 of 10 (permalink) Old May 4th, 11, 06:35 PM
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Re: What Carburetor do I have

Yer right...

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post #5 of 10 (permalink) Old May 4th, 11, 06:41 PM
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Re: What Carburetor do I have

Thats not an HP series. That looks like the choke horn was milled off.
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post #6 of 10 (permalink) Old May 4th, 11, 07:00 PM
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Re: What Carburetor do I have

If it was cut off someone did an outstanding job, here's what they typically look like...




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post #7 of 10 (permalink) Old May 4th, 11, 08:17 PM
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Re: What Carburetor do I have

Just a reminder to anyone thinking about milling off their choke horn. Get a stamp set and put the list number somewhere on the carb body. Someone will thank you for it later.
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post #8 of 10 (permalink) Old May 5th, 11, 04:48 AM
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Re: What Carburetor do I have

Looks like a later mech sec model carb, '80's?, due to the hex head bowl screws, and idle mixture locks, see the nub molded next to the mixture screws?, for the plastic caps over the mixture screws for an emissions block, if they were installed, stamped in place air bleeds vice screw-in.
Might measure the throttle bore diameter, 1 11/16 inch dia is the base plate used for the mech series, 47XX, 650 cfm to 800 cfm, but pri venturi dia is different for all models, smaller dia, 650-600 cfm, 1.25"; 1.312" for 700-750 cfm; 1.375 in for 750 & 800 cfm; 1.562" dia for 850 cfm. Secondary diam would confirm closer cfm as sec are 1/16" larger dia.

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post #9 of 10 (permalink) Old May 5th, 11, 07:48 AM Thread Starter
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Re: What Carburetor do I have

Thanks for the comments guys.

Factory no choke horn for sure, no milling.

I still have not nailed it down. Just going by images on the web it is in the HP / HO series. Probably an older model ?

I will take some measurements as Everett suggested and do some more comparing.

Anyone with more input would be appreciated.

Thanks
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post #10 of 10 (permalink) Old May 5th, 11, 09:36 AM
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Re: What Carburetor do I have

According to Holley Catalog, 1989, only the 4500 Dominator had no choke provision - carb body made this way.

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