Appropriate Carburetor for ZZ4 Performance Engine
Thread Starter
C3 Corvette Enthusiast
Joined: May 2008
Posts: 1,071
Likes: 3
Appropriate Carburetor for ZZ4 Performance Engine
My ZZ4 engine (350 CID) somehow has an Edelbrock 1803 carb on it. This carburetor is rated at 500 CFM. This may be good for increased fuel mileage but I'd like to use the ZZ4 at it's peak potential, so I'm looking for opinions of what I should do. I'm leaning towards an Edelbrock 600 CFM #1406.
Opinions? (God, this is the internet, I'll get plenty of those).
Thanks for any useful advise.
Opinions? (God, this is the internet, I'll get plenty of those).
Thanks for any useful advise.
Safety Car
Joined: Apr 2006
Posts: 4,057
Likes: 421
From: BC
I used the Edelbrock 1406 on my wife's ZZ4 equipped 78 with the GM "hot cam" and 1.6 rockers with hooker long tubes. The carb has worked very well for over 10 years. I think with 500 cfm you might be a bit light.
Race Director
Joined: May 2006
Posts: 18,690
Likes: 2,572
The complete ZZ4 engines comes with a Holley 750 CFM vacuum secondary carburetor. See the link below.
https://www.summitracing.com/parts/nal-12485506/
https://www.summitracing.com/parts/nal-12485506/
Race Director
Joined: Mar 2018
Posts: 10,641
Likes: 2,111
From: Golden Colorado
A lot depends on elevation and how you drive the car. I would look at 600 to 650 cfm. I like the Demon street carb with smaller primaries and triple stack boosters for the street. Great throttle response. It also has a 3 barrel like secondary goggle valve type which adds to top end. Easily tuneable and reasonably priced for under $300.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
z2 600 auto dp stick, perfect size. Prefer smaller and jetted over bigger and screwing with it unless its a WOT is best application
Most sbc will never fully utilize a 750 in thier lifetime
My old 350 was night and day faster with a nicely tuned 650DP over a brand new 750dp. Went from "pulled hard" to tire smoke when you wanted, response was awesome
Most sbc will never fully utilize a 750 in thier lifetime
My old 350 was night and day faster with a nicely tuned 650DP over a brand new 750dp. Went from "pulled hard" to tire smoke when you wanted, response was awesome
Thread Starter
C3 Corvette Enthusiast
Joined: May 2008
Posts: 1,071
Likes: 3
The complete ZZ4 engines comes with a Holley 750 CFM vacuum secondary carburetor. See the link below.
https://www.summitracing.com/parts/nal-12485506/
https://www.summitracing.com/parts/nal-12485506/
I have no idea how a 500 CFM carburetor ended up on my car.
Le Mans Master
Joined: Apr 2001
Posts: 5,941
Likes: 281
From: Was New Orleans but swam to Baton Rouge LA
Cruise-In IX Veteran
Demon made a ZZ4 crate demon 650 carb back in the day. I would suggest going with the equivalent holley style 650 from someone like AED performance. You could also just run a quadrajet and get the best of both worlds. If going the quadrajet approach I would have one rebuilt by Cliff's high performance so it is setup right.
Le Mans Master
Joined: Oct 2002
Posts: 7,098
Likes: 378
From: Las Vegas - Just stop perpetuating myths please.
Those Edel carbs are simple and hugely reliable. Nothing wrong with the Edel/Carter copy carbs. A more modern carb is what Summit now sells as thier own brand but it is a modern Holley design that Holley couldn't sell because it just didn't look like a Holley (enough) anymore. That Summit carb has a leak proof aluminum body and modern boosters along with electric choke.
Demon carbs are refined Holley style carbs and are sold by Holley now. Demon brand (now sold by Holley) also has a modern version of the Carter Thermo Quad. That's as modern as carbs get.
Myself I keep collecting 800cfm qjets with APT and electric choke. Buy them used at swapmeets for pocket change. But that's me.
It's all up to you and good luck with it.
Demon carbs are refined Holley style carbs and are sold by Holley now. Demon brand (now sold by Holley) also has a modern version of the Carter Thermo Quad. That's as modern as carbs get.
Myself I keep collecting 800cfm qjets with APT and electric choke. Buy them used at swapmeets for pocket change. But that's me.
It's all up to you and good luck with it.
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From: Golden Colorado
https://www.ebay.com/itm/Demon-Carbu...wAAOSw2DdbNCsD
Pro
Joined: Mar 2014
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From: Texas
Originally Posted by American [color=#c0392b
I'd [/color]Raven;1600341632]My ZZ4 engine (350 CID) somehow has an Edelbrock 1803 carb on it. This carburetor is rated at 500 CFM. This may be good for increased fuel mileage but I'd like to use the ZZ4 at it's peak potential, so I'm looking for opinions of what I should do. I'm leaning towards an Edelbrock 600 CFM #1406.
Opinions? (God, this is the internet, I'll get plenty of those).
Thanks for any useful advise.
Opinions? (God, this is the internet, I'll get plenty of those).
Thanks for any useful advise.
Race Director
Joined: Mar 2018
Posts: 10,641
Likes: 2,111
From: Golden Colorado
z2 600 auto dp stick, perfect size. Prefer smaller and jetted over bigger and screwing with it unless its a WOT is best application
Most sbc will never fully utilize a 750 in thier lifetime
My old 350 was night and day faster with a nicely tuned 650DP over a brand new 750dp. Went from "pulled hard" to tire smoke when you wanted, response was awesome
Most sbc will never fully utilize a 750 in thier lifetime
My old 350 was night and day faster with a nicely tuned 650DP over a brand new 750dp. Went from "pulled hard" to tire smoke when you wanted, response was awesome
Melting Slicks
Joined: Apr 2013
Posts: 3,483
Likes: 1,823
From: McCloud CA
C2 of Year Finalist (appearance mods) 2019
I have tried every type of carb and have to say edelbrocks are always down on power compared to a holley style. Quick Fuel Brawler Manual Double Pumper
Drifting
Joined: Mar 2006
Posts: 1,263
Likes: 188
From: Wabasha Mn
Get the Edelbrock carb tuning chart and use the rods and jets listed for a 1405 600 cfm carb which is richer than a 1406. Then you can go richer or leaner from there. Rods and jets for performer and AVS are the same.