carburetor problem
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Instructor
Joined: May 2018
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carburetor problem
Which carburetor would you recomend for this engine https://www.summitracing.com/int/par...make/chevrolet Is this a good one: https://www.summitracing.com/int/par...457s/overview/ I have a 68 corvette. Please link me a carburetor from Summit Racing. 
Last edited by C3ForLife1968; Mar 14, 2019 at 08:06 AM.
Dr. Detroit
Joined: Mar 2012
Posts: 10,090
Likes: 4,015
From: New Braunfels Texas
This one:
https://www.holley.com/products/fuel.../parts/0-90670
Before you go saying "It's a truck carb!" look at the features......it does not know if it is on a truck or a ski lift.....but I have used this MANY times on 300-350 HP engines and it works great.......I even had it on a hot 347 Ford that made close to 400 horsepower.....
The billet boosters make it work awesome on the street and why Holley does not add these boosters to the rest of their line is beyond me.
Jebby
https://www.holley.com/products/fuel.../parts/0-90670
Before you go saying "It's a truck carb!" look at the features......it does not know if it is on a truck or a ski lift.....but I have used this MANY times on 300-350 HP engines and it works great.......I even had it on a hot 347 Ford that made close to 400 horsepower.....
The billet boosters make it work awesome on the street and why Holley does not add these boosters to the rest of their line is beyond me.
Jebby
Last edited by Jebbysan; Mar 14, 2019 at 08:06 AM.
Thread Starter
Instructor
Joined: May 2018
Posts: 100
Likes: 4
This one:
https://www.holley.com/products/fuel.../parts/0-90670
Before you go saying "It's a truck carb!" look at the features......it does not know if it is on a truck or a ski lift.....but I have used this MANY times on 300-350 HP engines and it works great.......I even had it on a hot 347 Ford that made close to 400 horsepower.....
The billet boosters make it work awesome on the street and why Holley does not add these boosters to the rest of their line is beyond me.
Jebby
https://www.holley.com/products/fuel.../parts/0-90670
Before you go saying "It's a truck carb!" look at the features......it does not know if it is on a truck or a ski lift.....but I have used this MANY times on 300-350 HP engines and it works great.......I even had it on a hot 347 Ford that made close to 400 horsepower.....
The billet boosters make it work awesome on the street and why Holley does not add these boosters to the rest of their line is beyond me.
Jebby
what do you think of the carb I linked?
Dr. Detroit
Joined: Mar 2012
Posts: 10,090
Likes: 4,015
From: New Braunfels Texas
The one I linked is based on the one that you linked. Think of the Truck Avenger as the 0-80457 with Adjustable Vacuum Secondary, Billet primary boosters (annular), and a secondary metering block......
The Truck Avenger is expensive.......but I have had the best luck with it as a bolt on with no mods than any other carb I have every played with.
Edelbrock has yet another variation of the venerable AFB/AVS called the AVS 2 with billet primary boosters as well......may be worth a look. I like Edelbrocks on mild engines that make good vacuum but they tens to puke with large cams as the step up pistons get too easily confused. The Edelbrock would work well on that mild crate engine but not my first choice.
You missed the boat in the Parts section yesterday....there was a BRAND NEW Edelbrock Q-Jet in the box that sold for $300......that would have been the unit to use!
Jebby
The Truck Avenger is expensive.......but I have had the best luck with it as a bolt on with no mods than any other carb I have every played with.
Edelbrock has yet another variation of the venerable AFB/AVS called the AVS 2 with billet primary boosters as well......may be worth a look. I like Edelbrocks on mild engines that make good vacuum but they tens to puke with large cams as the step up pistons get too easily confused. The Edelbrock would work well on that mild crate engine but not my first choice.
You missed the boat in the Parts section yesterday....there was a BRAND NEW Edelbrock Q-Jet in the box that sold for $300......that would have been the unit to use!
Jebby
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,809
From: Cool Northern Michigan
You will have to change that style of fuel bowl vent tube on that truck carb if you use a drop-base air cleaner, which is common on C3s. The air holes on that vent will be in direct line with the bottom of the air cleaner lid.
Last edited by HeadsU.P.; Mar 14, 2019 at 08:58 AM.
Dr. Detroit
Joined: Mar 2012
Posts: 10,090
Likes: 4,015
From: New Braunfels Texas
Jebby
Thread Starter
Instructor
Joined: May 2018
Posts: 100
Likes: 4
Dr. Detroit
Joined: Mar 2012
Posts: 10,090
Likes: 4,015
From: New Braunfels Texas
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Burning Brakes
Joined: Dec 2005
Posts: 1,153
Likes: 341
And WTF is a "billet booster" or do I just need to Google it, and why it is such a good thing.
Last edited by wadenelson; Mar 14, 2019 at 10:53 AM.
Dr. Detroit
Joined: Mar 2012
Posts: 10,090
Likes: 4,015
From: New Braunfels Texas
My Father and his friends had dozens of Vette's over the years and I was right there always, eye open wide.....reading everything I could all of the time.-san is an honorary suffix in Japan that is attached to a person when thought of with respect...not necessarily of knowledge, although in Japan scholars are respected
Not like here 
..........many years ago, I lived in Long Island,NY......my name went Jeff to Jebby as I was always at the beach and chicks thought it sounded cool.....a few years after...my good friend Johnny Nova tossed the -san on the end as he was stationed in the ARMY as an escort for a high ranking Japanese/American official......the rest kinda stuck!!!Believe me though....there are a few people here (Alan is one-WHERE ARE YOU!!!???) who blast my knowledge out of the water.......and that is a good thing.
But on to boosters......I should say "billet annular" as that is what it is......The annular booster has strategically place holes placed radially (or annually) around the inside of the booster halo under the venturi step....most boosters...there is only one hole.....this annular design is much more sensitive to vacuum drop and it is much more responsive on the street..it "signals" better and signal is everything when it comes to carbs.......the downside is that they reduce over all airflow and go pig fat at very high RPM's....(verified on the dyno)......but for a 3/4 effort street engine they rock......
Jebby
Last edited by Jebbysan; Mar 14, 2019 at 11:06 AM.
Le Mans Master
Joined: Oct 2007
Posts: 7,410
Likes: 949
From: Tennessee/Rhode Island
Holley 4175 650 CFM vacuum secondary direct QJet replacement carb..been on my 78 L-82 4 speed since 1985. IT IS A GREAT CARB!
Still on the L-82 355 rebuilt with 425+ Gross HP and runs fantastically.......If you want originality go Qjet.....Want it to run correctly have LARS tune it. Want the easiest simplicastic alternative to a Qjet that will run as well if not better than a quadrajet, the Holley 4175 for these engines...period.
Still on the L-82 355 rebuilt with 425+ Gross HP and runs fantastically.......If you want originality go Qjet.....Want it to run correctly have LARS tune it. Want the easiest simplicastic alternative to a Qjet that will run as well if not better than a quadrajet, the Holley 4175 for these engines...period.
Last edited by jb78L-82; Mar 15, 2019 at 03:52 PM.