06-08-2009, 09:41 AM | #1 |
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Join Date: Mar 2003
Location: Uvalde, Tx
Posts: 407
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Carburetor Help
Need some help, my old man is tring to hookup a Holley 750 carb on his project, and we have been unable to figure where to connect the line that goes to the vacuum advanced. I have added photo's of the carb in question. Any assistance with this will be greatly appreciated. I believe it's the one in the second photo but I have been unbale to locate any documentation to verify this.
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1969 C/10 Longbed undergoing rebuild. Old Chevy's Never Die, They Just Rust Around The Edges |
06-08-2009, 10:24 AM | #2 |
Blaze-Air
Join Date: Nov 2008
Location: Virginia
Posts: 1,117
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Re: Carburetor Help
First pic, above the choke. Plug any vac ports not in use.
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06-08-2009, 04:32 PM | #3 |
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Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,229
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Re: Carburetor Help
The openings in the top photo are for an exhaust heated choke. Beings you have an electric choke you don't need them. Block them off or connect them together. The outlet in the second photo is for the dist. advance. It is ported vacuum. Sometimes manifold vacuum works better especialy if you have a performance cam. You could get manifold vacuum from the outlet under the carb. with the plastic cap. You will have to reduce it down. There might be an outlet on the manifold in back of the carb you could use also for full manifold vacuum.
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06-08-2009, 04:54 PM | #4 |
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Join Date: Mar 2003
Location: Uvalde, Tx
Posts: 407
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Re: Carburetor Help
Thanks for the Info. I will pass it on to my dad.
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1969 C/10 Longbed undergoing rebuild. Old Chevy's Never Die, They Just Rust Around The Edges |
06-09-2009, 06:31 AM | #5 |
ENGINE BUILDER
Join Date: Apr 2006
Location: Shortsville n.y.
Posts: 344
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Re: Carburetor Help
The ported vacuum is on the primary metering block behind the float bowl sight plug.
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