Holley carb id - Team Camaro Tech
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post #1 of 10 (permalink) Old Jul 10th, 15, 02:06 PM Thread Starter
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Holley carb id

Sorry I'm sure this in a noob question but I need to order some parts for this Holley I just picked up. It is stamped 3310-11 on the horn. Is it a 4150 or 4160? I know it is a 750 vac secondary. I need to order the fuel line kit for the bowls. Also does anyone know what size and thread it is? Thanks
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post #2 of 10 (permalink) Old Jul 10th, 15, 03:06 PM
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Re: Holley carb id

The early 3310 and 3310-1 were 4150 with vac secondary so more than likely yours is a 4160 being a later revision. Summit has this fuel line for the 4160 http://www.summitracing.com/int/part...4-160/overview and another one http://www.summitracing.com/int/part...g3110/overview that has the barb end to slip on a rubber gas line.

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post #3 of 10 (permalink) Old Jul 10th, 15, 05:38 PM
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Re: Holley carb id

4150 is for vacuum secondary
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post #4 of 10 (permalink) Old Jul 10th, 15, 07:31 PM
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Re: Holley carb id

Quote:
Originally Posted by ds1 View Post
4150 is for vacuum secondary
I did a search at Summit Racing for Holley 4150 carbs and out of a total of 78 carbs 74 were mechanical and 4 vacuum.
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post #5 of 10 (permalink) Old Jul 10th, 15, 08:23 PM
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Re: Holley carb id

Only the 3310-1 was a 4150, 4150 carbs have front and rear metering blocks and use the wider fuel line, you have a 4160 with no rear metering block and use the short fuel line.

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post #6 of 10 (permalink) Old Jul 10th, 15, 10:53 PM
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Re: Holley carb id

Quote:
Originally Posted by ds1 View Post
4150 is for vacuum secondary
4150 is the model number. Like I have a 4150 HP 850 DP. The main difference in the vacuum secondary carburetor it does not have a secondary accelerator pump. The 4160 model is a vacuum secondary carburetor. Unlike the 4150 vacuum secondary it has a metering plate instead of a metering block with a jet. The 4160 is a single feed carburetor where as the 4150 is a dual feed.
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post #7 of 10 (permalink) Old Jul 11th, 15, 08:10 AM
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Re: Holley carb id

A lot of 4160s are dual feed. The 0-08058S, 0-0310SA, 0-0310C, and 0-9015-1 models are listed as dual inlets. The dual feed 4160s are going to be the 750 CFM models.

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post #8 of 10 (permalink) Old Jul 12th, 15, 07:32 AM
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Re: Holley carb id

As said - the 4150 has a secondary metering block with replaceable jets. The 4160 has a metering plate for the secondaries and is shorter than a 4150.

Vac secondary Holleys can be either 4150 or 4160. Kits are available to convert a 4160 (metering plate) to a 4150 (metering block), so don't go by the list# stamped on the choke horn - look at the carb. If there is a metering block between the main body and the rear float bowl, get a fuel line kit for a 4150. If it looks like the rear bowl attaches directly to the main body, get a line kit for a 4160.

There are several different thread sizes for the fuel inlet nuts. I would recommend buying the line kit that you want. If the threads are correct for your fuel inlet nuts - great. If not, buy the correct nuts to match your line kit.


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post #9 of 10 (permalink) Old Jul 12th, 15, 07:48 AM Thread Starter
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It does have the metering plate between the sec bowl but w/o mixture screws. It's the 4150. I measured the center to center distance of the inlet and it was just a touch over 9". Went over to the auto parts store and picked up a cheap-o $15 mr gasket fuel line kit, the 2-1 stainless double flange tube one. I had to put it on and off 3 times, damn thing kept leaking at the connections. Now it barley leaks at the rear flange, I need to take it off and try to rear seat it again. drove it around the block and at idle and slight throttle it did great but when I tried to give it some gas she coughed and hesitated. I'm going to make sure my timing is spot on before I tinker with the carb.
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post #10 of 10 (permalink) Old Jul 17th, 15, 07:55 AM
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Re: Holley carb id

Quote:
Originally Posted by Nhurt View Post
Sorry I'm sure this in a noob question but I need to order some parts for this Holley I just picked up. It is stamped 3310-11 on the horn. Is it a 4150 or 4160? I know it is a 750 vac secondary. I need to order the fuel line kit for the bowls. Also does anyone know what size and thread it is? Thanks

You have a 4160

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