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500 or 600 Edelbrock?
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Author:  Aggressive Ted [ Sat Sep 20, 2008 8:12 am ]
Post subject:  500 or 600 Edelbrock?
My engine specs are listed at the bottom. For those of you that have run the Edelbrock carbs, which one have you found to work the best with this build?
Are the primaries on both carbs the same?

I am looking for a little more power at 2000 rpm. Max cruise is 2500 rpm which is 60 mph.
The carb will be mounted on a Weiand four barrel manifold. I am not sure which of the two carbs will perform the best at 2000 to 2500 rpm. What should I expect the mileage to be at this cruise speed? The Swinger weighs 3600 lbs. with a full tank of gas and me in it.
Any differences between the AVS series vs the Performer series?

Thanks, :D

I have an 600 AVS on my 69 Chrysler 300, 10/1 375HP 440 and it gets 19 mpg back and forth to work, 130 mile round trip.
Author:  Reed [ Sat Sep 20, 2008 8:40 am ]
Post subject: 
I recommend the 500. If your RPMS will never get much above 3000, then you will be happier with a smaller carb.

I really like edelbrocks and have run them on several vans with v-8 motors I have had. Very easy to tune and work on, not nearly as leak prone and fidgety as Holley carbs.
Author:  68barracuda [ Sat Sep 20, 2008 9:41 am ]
Post subject: 
If you could get a 400 it would even have been better - but since it is a Vacuum secondary type carb it will only use as much of the max flow as it needs

http://www.edelbrock.com/automotive_new ... main.shtml

AVS is a newer development of the performer which in turn is a recreation of the AFB/AVS series carters
http://www.edelbrock.com/automotive_new ... nder.shtml

http://www.edelbrock.com/automotive_new ... rmer.shtml

From , what I can see I would go for the AVS 500 CFM
Author:  Reed [ Sat Sep 20, 2008 11:27 am ]
Post subject: 
Ditto. 400 CFM is better. Of course, you could try my favorite, the Holley 4360. 450 CFM, spread bore, economaster series. I love it. Never ran one on a slant though.
Author:  Aggressive Ted [ Sat Sep 20, 2008 12:28 pm ]
Post subject: 
Thanks for the tips gents! I have not seen a new 400 CFM Edelbrock listed. Got a part number or link? I wanted to buy a new unmolested carb.

The spread bore is a temptation but all that is listed new now are the 4165 and 4175 Holley's rated at 650 cfm.

Between the 500 and 600 Edelbrock's it seems the 500 AVS would be a good choice. :)
Author:  Reed [ Sat Sep 20, 2008 1:09 pm ]
Post subject: 
Edelbrock 400 cfm carbs and Holley 4360 carbs are not available new. These would be strictly swap meet or ebay items.
Author:  slantasaurus [ Sun Sep 21, 2008 6:50 am ]
Post subject: 
I don't think Edelbrock has ever made a 400cfm carb, just 500, 600, or 750 in the Performer series. I think the "new" AVS style carbs start at 650cfm.
Author:  volaredon [ Sun Sep 21, 2008 7:07 am ]
Post subject: 
wasn't the 273 4 bbl a 400 cfm? I have seen Carter (pre Edelbrock) 400 cfm carbs, universal style, at the swaps. IIRC they had the "black dial" type electric choke and had the "Competition Series" logo on the edge of the air horn. One thing to rememeber though is the '60s factory Mopar carbs took a slightly smaller air cleaner base (the hole that fits on/seals on the carb, that is)
Author:  volaredon [ Sun Sep 21, 2008 7:07 am ]
Post subject: 
wasn't the 273 4 bbl a 400 cfm? I have seen Carter (pre Edelbrock) 400 cfm carbs, universal style, at the swaps. IIRC they had the "black dial" type electric choke and had the "Competition Series" logo on the edge of the air horn. One thing to rememeber though is the '60s factory Mopar carbs took a slightly smaller air cleaner base (the hole that fits on/seals on the carb, that is)
Author:  rock [ Sun Sep 21, 2008 7:34 am ]
Post subject:  Ted, I ran the 1404 500 cfm and now use the Holley 8007
Ted,

I ran the 1404 500 cfm eddy. I loved it and my range of operation is in the rpm's you list. I have never seen for sale a 400 cfm Performer or newer eddy so it may be they are South African items, similar to the way many things are in Aussie land we don't see here. Based on my 390 cfm 8007 HOlley I run now I think if a 400 vacuum secondary eddy was available to buy I would get one and pop in on though. Admittedly I have a well built slant but it is breathing for a heavy foot and a 3.91 sure grip in a truck. I switched from the 500 cfm eddy to the 390 cfm Holley just because I am an endless tuner. WQithout using a dyno I can only describe feel, but I feel the Eddy had more power quicker in my lower rpm range...1500 to 2500. No doubt the eddy is bolt on and go, but even then I changed metering rods some to maximize jump at start. It ran so well I only allowed myself about 12 mpg but I didn't build this engine for mileage, only for power. I love the Holley and its complexities once I got the hang of it. I do have a half dozen other 4 bbl carbs laying around in the economaster series but just rebuilt them and put them on the shelf so I can't talk about them. It seems to me the economasters are spreadbore though and I made my adapter stack for all bores of same diameter.

rock
'64d100
Author:  68barracuda [ Sun Sep 21, 2008 7:35 am ]
Post subject: 
400cfm AFB Carter ......
Author:  Dart270 [ Mon Sep 22, 2008 7:58 am ]
Post subject: 
Definitely do not get the 600 Edel. Too big for your mild buildup and will likely bog at lower RPM. I ran the 600 on my '64 Dart and it worked well though. I have not tried the AVS at all.

I have a 500 Edel Performer that worked quite well for me (w/elec choke - worth it). Great street carb and should work well on your build. Easily tunable too. Unless you build a much more powerful motor, it will be more than enough.

The 400 Carter would work well too, but only OEM 40yr old carbs are available.

Lou
Author:  AnotherSix [ Mon Sep 22, 2008 9:02 am ]
Post subject: 
There were 400 cfm Performer models made. They have not been made for a long time (80s?)and are very hard to find now, I have been looking.

They were used mostly on small engines or dual carb street ram intakes.

The 500 and 600 cfm models have the same size primarys.
Author:  Dart270 [ Mon Sep 22, 2008 11:48 am ]
Post subject: 
Actually, the 500 and 600 models have the same secondaries, but 500 has smaller primaries, which is what you want for throttle response. The only difference I could see (bought/tried both 500 and 600) was that the 500 had a thicker booster assembly to constrict the venturi. Everything else seemed exactly the same.

Lou
Author:  ceej [ Mon Sep 22, 2008 12:16 pm ]
Post subject: 
My Carter AFB was a 500 cfm. It has 600 cfm boosters in it. On the AFB, they could be interchanged.

IIRC, the Edelbrock boosters won't interchange between the 500 and 600cfm models. It's been a while, so I might be remembering something wrong.

For a street car, the 500 should be the ticket. There won't be much difference in economy out on the Freeway, but your in town mileage will be better than with the 600.
The air valve will keep the secondary from pulling open too much. If you find they aren't opening quickly enough, lighen the weight. Be careful, and give yourself a provision for putting some weight back, should you encounter a bog.
As I pointed out in the PM, these engines love the bigger primary venturi's, but it requires more jet to make them work, and you'll lose some of your economy on short trips.
Setting up a 600 for a basically stock motor is do-able, as many folks have proven. Jetting needs to be a tad thicker for the bigger carb due to having less signal.
If you are going to be towing, you will probably be ahead of the game going with the 500.

CJ
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