Carb question
Thread Starter
Racer
Joined: Aug 2012
Posts: 424
Likes: 3
From: Presently working under contract in Alabama
Carb question
I have a Holley double pumper on a 454 in my 68.
The carb has been wired open. It does not have an electronic choke on it nor is there a manual set-up.
Any recommendations on repairing this or get a rebuilt carb. I will try to get a photo tomorrow.
The 454 is built to 468 and I am open to suggestions on a carb.
Thanks guys
The carb has been wired open. It does not have an electronic choke on it nor is there a manual set-up.
Any recommendations on repairing this or get a rebuilt carb. I will try to get a photo tomorrow.
The 454 is built to 468 and I am open to suggestions on a carb.
Thanks guys
Drifting
Joined: Jan 2002
Posts: 1,645
Likes: 11
From: Schaumburg IL
Certainly appears the Holley is a mess and probably not worth the $$ to make it work. No choke, wired, probably ill tuned for your car. Two real choices: A well tuned Q-Jet or a Holley will both work. Do forum searches, talk to clubs by you, go to car shows and look at BBC's or Vettes to help you make a decision.
Both types of carbs are capable of supplying what is needed to make the machine run well and hard. I would look at one of the speciality carb houses; like SMI, JET, Carb shop or others and have a carb build to your cars specs. The cost will end up being the same since you have to get one anyway.
Both types of carbs are capable of supplying what is needed to make the machine run well and hard. I would look at one of the speciality carb houses; like SMI, JET, Carb shop or others and have a carb build to your cars specs. The cost will end up being the same since you have to get one anyway.
Thread Starter
Racer
Joined: Aug 2012
Posts: 424
Likes: 3
From: Presently working under contract in Alabama
Certainly appears the Holley is a mess and probably not worth the $$ to make it work. No choke, wired, probably ill tuned for your car. Two real choices: A well tuned Q-Jet or a Holley will both work. Do forum searches, talk to clubs by you, go to car shows and look at BBC's or Vettes to help you make a decision.
Both types of carbs are capable of supplying what is needed to make the machine run well and hard. I would look at one of the speciality carb houses; like SMI, JET, Carb shop or others and have a carb build to your cars specs. The cost will end up being the same since you have to get one anyway.
Both types of carbs are capable of supplying what is needed to make the machine run well and hard. I would look at one of the speciality carb houses; like SMI, JET, Carb shop or others and have a carb build to your cars specs. The cost will end up being the same since you have to get one anyway.
Burning Brakes
Joined: Oct 2008
Posts: 1,037
Likes: 14
From: Mobile Alabama
I would first ask if the car runs correctly. I assume you meant that the choke plate is wired open. If the car runs OK, you can remove the choke plate - many don't use a choke. OR you could have the choke parts replaced to make it function, and put a rebuild kit in it to freshen it up. If you buy a new or rebuilt carb, it will still need some tuning to get the best performance. So either way you will need someone to tune the carb. Find a good mechanic and let him give advise, or do it yourself, ask Lars for his paper on tuning.
Tech Contributor
Joined: Aug 1999
Posts: 14,356
Likes: 6,330
From: At my Bar drinking and wrenching in Lafayette Colorado
The Holley, if it's the right size and type for your engine configuration, can be tuned and set up to run just great without the choke system. I would suggest removing the entire choke system and properly setting up the carb - I think you'll find this to work just fine. If you send me the carb, I can do that for you and test it, if you're hesitant to do it yourself.
Lars
V8FastCars@msn.com
Lars
V8FastCars@msn.com
Le Mans Master
Joined: Mar 2008
Posts: 5,948
Likes: 72
From: Oxford MA-----You just lost the game!!!!
http://www.holley.com/data/TechServi...%20Listing.pdf
Scroll down until you come to your carb's LIST number (R4781-5) and you will see detailed info on your carb.
Keep the shiny side up!
Scott
Scroll down until you come to your carb's LIST number (R4781-5) and you will see detailed info on your carb.
Keep the shiny side up!
Scott
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Drifting
Joined: Jul 2006
Posts: 1,259
Likes: 154
From: Deplorableville Nebraska
The Holley, if it's the right size and type for your engine configuration, can be tuned and set up to run just great without the choke system. I would suggest removing the entire choke system and properly setting up the carb - I think you'll find this to work just fine. If you send me the carb, I can do that for you and test it, if you're hesitant to do it yourself.
Lars
V8FastCars@msn.com
Lars
V8FastCars@msn.com
You haven't spray bombed those covers yet?
Thread Starter
Racer
Joined: Aug 2012
Posts: 424
Likes: 3
From: Presently working under contract in Alabama
I have some nice finned valve covers picked out if this engine turns out to be street-able.
Hoping to have it down on all four tires soon.
Race Director
Joined: Mar 2009
Posts: 19,777
Likes: 4,592
From: Canada's capital
2020 Corvette of the Year Finalist (appearance mods)
C1 of Year Finalist (appearance mods) 2019
holley also has an excellent rebuilding program. Check it out, from what I know they come back like new.
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
My 69 has not had a choke since 1971. Several were just locked open, some didn't have a choke at all. Never had any problems. The Demon on there now has no choke horn at all. The 2x4 Edelbrock setup they were blocked open.
Le Mans Master
Joined: Oct 2010
Posts: 6,901
Likes: 834
From: melbourne florida
2023 C3 of the Year Finalist - Modified
there is nothing wrong there,whoever had it just wired the choke open so it couldn't close on its own.let lars set it up. all holley will do is put it back to stock, Lars can set it up for your car.
Burning Brakes
Joined: Sep 2009
Posts: 1,124
Likes: 140
From: Western New York
From what I see in your first picture, you already have the manual choke mechanism on the side of the carb that will allow you to install a cable for the manual choke. If you don't care for a manual choke, that mechanism can be removed and an electric choke installed in its place. Everything is sold at Summit Racing.
Duane
Duane
