Dual Quad
Thread Starter
Drifting
Joined: Jun 2010
Posts: 1,781
Likes: 15
From: Oxford Ohio
Dual Quad
I have a 75 with Dart Little M 400. I'm considering using a dual quad intake. Has anyone tried that or similar combination? Is there clearance issues with the carb height for that length? The heads are Canfield with 2.100 intake and 1.60 exhaust. Thanks for your knowledge/opinion.
Le Mans Master
Joined: Aug 2006
Posts: 7,431
Likes: 1,562
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
I can't answer your question but I'd put the dual quads on just for looks!
You gave me a flashback!
A long time ago I had dual's on my 440 Chrysler.
Forget about mpg, lol.
You gave me a flashback!
A long time ago I had dual's on my 440 Chrysler.
Forget about mpg, lol.
Melting Slicks
Joined: Dec 2009
Posts: 3,235
Likes: 658
From: Thunder Bay
I remember reading an article many years ago that compared dual quads, six pack, and single carb setups for power output. The single four barrel was the clear winner. But nothing looks as cool as a dual quads. 
Race Director
Joined: Mar 2003
Posts: 11,608
Likes: 780
From: Eustis ( Area 51 Bat Cave ) Fl
But yeah, multi carbs have old school coolness if i could afford them this is one place i would go simple and better and just get fuel injection,
Drifting
Joined: Aug 2015
Posts: 1,939
Likes: 477
From: NSW, Australia
C3 of Year Finalist (track prepared) 2019
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,276
Likes: 9,417
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
i like the Weber down draft six pack look, then the 3 carb six pack, duel quads.
but a dual quad setup on a 4-71/ 6-71 blower....OOOH MY!!!!!
but a dual quad setup on a 4-71/ 6-71 blower....OOOH MY!!!!!
Le Mans Master
Joined: Aug 2006
Posts: 7,431
Likes: 1,562
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
5 Best & 5 Worst Corvette Daily Drivers
Joe Kucinski
The Headlights of Every Corvette Generation Explained
Joe Kucinski
5 Best & 5 Most Overrated Corvette Track Packages of All Time!
Joe Kucinski
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,276
Likes: 9,417
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
REALLLLY BIIIGG hood scoop...LOL
Race Director
Joined: Jun 2000
Posts: 10,053
Likes: 679
From: FL
Last edited by SteveG75; Mar 15, 2018 at 07:27 PM.
Is my vette stock?? HAHA
Joined: Oct 2015
Posts: 20,276
Likes: 9,417
From: Im not allowed to tell you
2020 C3 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (performance mods)
2019 C3 of Year Winner (performance mods)
2016 C3 of Year Finalist
thats very cool!!!!
Racer
Joined: Apr 2009
Posts: 331
Likes: 44
From: Cincinnati Ohio
Considering that C1's had some dual quad options, I would suspect it might fit. BUT, I would check the height difference on carb mounting surface from single carb manifold you have to the manifold you are considering. Then look at the difference in carb heights between what you have and what you are going to run. You might also contact your head manufacturer to see if they raised the intake ports compared to 'stock'. You have a lot of different non-stock items that could affect the overall install height.
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
I don't want to be a Barney Bummer but any dual quad intake short of a tunnel ram will have no chance feeding a 400 inch engine. The low rise units could barley flow enough air for the 283's they came on......the Edelbrock C36 is almost identicle to the GM unit and is woefully inefficient......it might support 300 horsepower.
The only dual quad intake that has a chance is the Performer RPM dual quad manifold and even it is down compared to a 1x4 Air Gap setup.......I would pass on the 2x4 deal unless you really have to have the looks.
Now a Tunnel Ram on the other hand......will pickup everywhere in the curve.....but it is important to use a 1 to 1 linkage and front to back carbs only on the street.
Jebby
The only dual quad intake that has a chance is the Performer RPM dual quad manifold and even it is down compared to a 1x4 Air Gap setup.......I would pass on the 2x4 deal unless you really have to have the looks.
Now a Tunnel Ram on the other hand......will pickup everywhere in the curve.....but it is important to use a 1 to 1 linkage and front to back carbs only on the street.
Jebby
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas