Holley 4011????????
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Joined: Apr 2018
Posts: 95
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From: North Central IL.
Holley 4011????????
A friend gave me a Holley 4011 spread bore carb. It is a dual feed 650 cfm vac secondary with electric choke and looks to be in very good original shape. My research revealed this Holley carb was designed and approved for marine applications due to its unique bowel venting design, (prevents fumes in the bilge), and was introduced in the late 80's. It was produce for about ten years but never really caught on so it was discontinued by Holley.
It seams back in the day hot rodders on the street really liked and touted them. Are any of you guys familiar with this carb and if so what are your opinions of it for street use. I'm running a quadrajet that Lars helped me get dialed in along with proper timing setting on my 420 HP 383 stroker.
I am curious about this carb and am thinking about trying it out for fun. I have disassembled, cleaned and have a rebuild kit on order for it. (yes kits are available)
Here's the link to the kit I have ordered: https://allcarbs.com/product/holley-...ry-model-4011/
Here's a picture link to a carb identical to mine only it has a manual choke: https://www.ebay.com/itm/Holley-List...gAAOSwGENevwY7
It seams back in the day hot rodders on the street really liked and touted them. Are any of you guys familiar with this carb and if so what are your opinions of it for street use. I'm running a quadrajet that Lars helped me get dialed in along with proper timing setting on my 420 HP 383 stroker.
I am curious about this carb and am thinking about trying it out for fun. I have disassembled, cleaned and have a rebuild kit on order for it. (yes kits are available)
Here's the link to the kit I have ordered: https://allcarbs.com/product/holley-...ry-model-4011/
Here's a picture link to a carb identical to mine only it has a manual choke: https://www.ebay.com/itm/Holley-List...gAAOSwGENevwY7
Had a 1976 L-82, 4-sp
Joined: Mar 2011
Posts: 5,338
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From: Some days your the dog and some days your the hydrant.
Royal Canadian Navy
I ran that exact carb for several years until I stepped up to Holley Street HP. I never had any issues with it except it was vacuum secondaries and I wanted mech'l in my old age.
Dr. Detroit
Joined: Mar 2012
Posts: 10,093
Likes: 4,019
From: New Braunfels Texas
They work fine but I doubt you will gain anything.......Summit bought the tooling and sells the Square bore ones now. The only rub about these is that you have to physically remove the carb from the engine to change a power valve.
I ran a square bore when they first came out in 1991 on a 350 in an S-10 that I built as a young man......it worked very well. Wanted to be able to jet without spilling gas everywhere.
Jebby
I ran a square bore when they first came out in 1991 on a 350 in an S-10 that I built as a young man......it worked very well. Wanted to be able to jet without spilling gas everywhere.
Jebby
Race Director
Joined: Jul 2015
Posts: 13,082
Likes: 3,399
From: SW Florida.
That is the real advantage in a boat. There is no float bowl gasket that could leak. Get a little gas drip in your car the wind is blowing through your engine compartment and evaporates it out. Get a gas leak in your boat there is no wind. fuel vapors can quickly get to explosive levels. functionally they are the same as any other Holley. which is not a bad thing.
Last edited by derekderek; May 20, 2020 at 12:44 PM.
