Dual Quads??
Thread Starter
Melting Slicks
Joined: Nov 2004
Posts: 2,540
Likes: 1
From: Pineville Kentucky
CI 6-8-9 Veteran
Dual Quads??
I am debating replacing the airgap/holley 750 with this Edelbrock dual quad set-up. The carb./intake came with the car when I traded for it last Summer. It is sitting on the shelf collecting dust. I either need to put it on this build or sell it. Anybody have opinions?? I know it would LOOK great but how will it perform on a 454 built roller engine street cruiser?? [IMG]
[/IMG]
[IMG]
[/IMG]
[/IMG][IMG]
[/IMG]
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
I would put it on even if it cost me a couple of HP it looks sooo 
I was contemplating put one of those on mine not long ago and would have if I had the setup sitting on a shelf 
I was contemplating put one of those on mine not long ago and would have if I had the setup sitting on a shelf
Melting Slicks
Joined: Feb 2003
Posts: 2,529
Likes: 27
From: Auburndale Florida
2025 C2 of the Year ('64-'66) Finalist - Unmodified
St. Jude Donor '03-'05-'06-'07-'09
Brent go for it!!!!
My first car was a '57 2 door Belair, with a 283 punched out to a 302 (actually a 301) Duntov 30-30 solid cam and "Dual Quads". Two Carters on an old Vette intake. Of all the cars I have had, this setup drew more attention when I cracked open the hood. Old school but still cool..
My first car was a '57 2 door Belair, with a 283 punched out to a 302 (actually a 301) Duntov 30-30 solid cam and "Dual Quads". Two Carters on an old Vette intake. Of all the cars I have had, this setup drew more attention when I cracked open the hood. Old school but still cool..
Just another Corvette guy
Joined: Feb 1999
Posts: 8,518
Likes: 3,865
From: Palm Springs, CA.
Dude, go for it....I did!!! George is right, it may not be the most efficient but it'll be the most bitchin' car on the block! 
OK it's not a Vette, and it was years ago, but I used to rip 'em at the traffic lights.....
OK it's not a Vette, and it was years ago, but I used to rip 'em at the traffic lights.....
Instructor
Joined: Feb 2005
Posts: 188
Likes: 0
From: Kearney Nebraska
I tried a dual quad at first after the rebuild. I couldn't get it to run good and gave up. (although I'm sure part of the problem of getting it to run good was my inexperience) Replaced it with a RPM Air-Gap 2-R Intake and a Holley 850 "HO-Mod AED carb. Here is a pic of the dual quad setup.
Last edited by big69; Mar 4, 2006 at 12:00 AM.
Just another Corvette guy
Joined: Feb 1999
Posts: 8,518
Likes: 3,865
From: Palm Springs, CA.
Brent,
You can really get just as good a performance with a good dual plane high rise and a single 4 barrel. My Z-28 was a small block and an ultra high revver so got away with the Edelbrock TR1-Y tunnel ram. But that stuff is mostly show for the street.... good show,though
Best,
Greg
You can really get just as good a performance with a good dual plane high rise and a single 4 barrel. My Z-28 was a small block and an ultra high revver so got away with the Edelbrock TR1-Y tunnel ram. But that stuff is mostly show for the street.... good show,though
Best,
Greg
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Originally Posted by 2th farmer
What do you mean efficient?? MPG? or performance?
A guy with a built to the hilt 454 isn't to concerned about mileage, especially after I seen that nice duelly. Your used to puttin gas in em!!
Race Director
Joined: Feb 1999
Posts: 16,978
Likes: 7
From: In Dreams There Is Truth Ohio
I'm not talking about MPG, but since ya all brung it up...teh MPG will suck an' to boot, teh Holley will run circles around the Quads...that's what I means 'bout efficient...the dual quad intake is no match for one of the newer single quad intakes.
Now if you run a forced induction or tunnel ram, that's a complete different ball game...
Now if you run a forced induction or tunnel ram, that's a complete different ball game...
Race Director
Joined: May 2005
Posts: 10,674
Likes: 122
From: Millington Illinois
St. Jude Donor '08-'09
Originally Posted by MotorHead
I would put it on even if it cost me a couple of HP it looks sooo I was contemplating put one of those on mine not long ago and would have if I had the setup sitting on a shelf
I was contemplating put one of those on mine not long ago and would have if I had the setup sitting on a shelf 
Looks So what if it cost a few HP, you got plenty. I think if it is properly jetted and tuned It will run with the Holley if not stronger! With the engine you have I think it can handle some extra carburation. I am building a 383 forged stroker for mine now and it's getting the tripower I got now. Had recomendations for 750 to 825 CFM on it. Might cost me some HP too but it's fast enough. Your probably not worried about 1/10 at the dragstrip, The look and the sound of the dual quads kicking in will be worth it.
Drifting
Joined: Jul 2001
Posts: 1,418
Likes: 1
For a street rod it's a anything goes type deal . It don't have to pick up alot of power as long as it don't kill off a bunch
Sometimes really bitchin can outweigh really fast .
Is this guy a member here ?
http://videos.streetfire.net/video/0...8EF04A3AC2.htm
Sometimes really bitchin can outweigh really fast .
Is this guy a member here ?
http://videos.streetfire.net/video/0...8EF04A3AC2.htm
Burning Brakes
Joined: Aug 2005
Posts: 1,126
Likes: 0
From: Hudson Falls, N.Y. 76 Vette Modified L-48
Here's my 2 cents...I have a dual Edelbrock setup...but nothing (I'm finding out) under it to make it go (I will adress that in another thread)....YES, it looks very, VERY COOL ...but I am deciding on swapping for a single quad...MPG (GPM 
)?...it's a hog, the guys all smile at the pump when they see me coming..fast?...NO, at least not what I would expect anyway....but you sound like you have what it takes under the intake to make it work...for looks, you can't beat 'em...and when you open them both up, the sound is intoxicating... 
...but I am deciding on swapping for a single quad...MPG (GPM )?...it's a hog, the guys all smile at the pump when they see me coming..fast?...NO, at least not what I would expect anyway....but you sound like you have what it takes under the intake to make it work...for looks, you can't beat 'em...and when you open them both up, the sound is intoxicating...
Thread Starter
Melting Slicks
Joined: Nov 2004
Posts: 2,540
Likes: 1
From: Pineville Kentucky
CI 6-8-9 Veteran
Thanks for the input guys.I plan on getting the bugs out for a week or two and then trying the dual quad. If it stinks then off it comes. I am not worried about loosing a couple of HP though since this car will never see the track and should have more than enough to hold it's own with the local rustangs and ricers. 
Drifting
Joined: Jul 2001
Posts: 1,418
Likes: 1
Originally Posted by GDaina
Well dude...welome back, don't stay away so long...
Thanks ! I just have been playing with my motorcycles and horses but Corvettes remain very dear to me .
Corvette ......... that name is iconic
Pro
Joined: Nov 2004
Posts: 531
Likes: 118
From: Atlanta area
Brent... Obviously I'm biased in favor of the dual AFBs, since I bought them for that car, but you have to put them on!! There's nothing more awesome on a big torque motor than having 8 barrels of vacuum operated carb. It'll just keep on coming on from 2500 to 6000 RPM when you nail it. I had the same setup on a '62 Impala SS with a 409/425, (yes, it was a '65 motor). That thing was scary fast, even in a big Impala body.
The motor you're building is going to be an under-6000 RPM torquer, much like the old 409 was, and that's perfect for the "low efficiency" dual quads. The manifold doesn't flow all that well, but they're so big that it won't matter. The carbs are 600s, so you have 1200 cfm available!! If you get them set up right with the correct metering rods that Edelbrock has for dual quad operation, and then get them fine tuned by someone with experience, you won't regret it. You'll need the throttle solenoid for A/C operation, but Edelbrock sells them.
ANd then, there's the factor that others have mentioned. Lots of the guys with BBs at Pigeon Forge and other rod gatherings have them, and they definitely get the looks over the boring single Holley setups.
Just my $.02 worth.
The motor you're building is going to be an under-6000 RPM torquer, much like the old 409 was, and that's perfect for the "low efficiency" dual quads. The manifold doesn't flow all that well, but they're so big that it won't matter. The carbs are 600s, so you have 1200 cfm available!! If you get them set up right with the correct metering rods that Edelbrock has for dual quad operation, and then get them fine tuned by someone with experience, you won't regret it. You'll need the throttle solenoid for A/C operation, but Edelbrock sells them.
ANd then, there's the
factor that others have mentioned. Lots of the guys with BBs at Pigeon Forge and other rod gatherings have them, and they definitely get the looks over the boring single Holley setups.Just my $.02 worth.