Edelbrok or Holley?

[Durandal25]

Good mention! Use a thick gasket under the Edelbrock carbs. The factory used a thick gasket under there carbs. You should too. It will stop fuel percolation and help tune the engine. Runs cool in the driveway even at running temp. But after a good drive, the carb will get heated up really good with a thin gasket.
The phenolic spacer is a good sub part.

I'm going to order the wooden one Edelbrock makes. I have heard really good things about them.

 

[rsd859]

Holley all the way!!!

 

[Budnicks]

Budnicks,

If I were to go the Holley route, what would you recommend for a stock 383 HP motor sir?

is it a manual trans or automatic trans ??, how many mods have been done to the 383ci engines ??, what is your expectations ??, what is the intended use ??, I would suggest to use a between a 600cfm up-to about a 780cfm on a mostly stock type engine depending on what driving conditions ??, what altitude you live at ??, is it strictly a daily driver type, a hot street car or a Street/strip car ??, if it's the daily driver, then the smaller the carb, would be probably better for mileage & all around drivability... If it's more of a hot street car then a little bigger maybe middle of the road 680-700cfm, if it's a little more modified like headers, cam, intake & hot ignition, street/strip car then toward the top end of the 750-780ish/cfm... The formula/guideline for carburetor size; Cubic Inches X Rpm, divided by 3456 = total cfm example; 383 Ci's X 5500 Rpm div. by 3456 = 609cfm... that's at about an 80% efficiency ratio of useable fuel... I like Quickfuel carbs {but just my preferences} a SL-600-VS with electric choke would be about the @ beginning point {about $300, depending on where you buy} & up-to the maybe the 4160 Holley 770cfm Street Avenger with Vacuum Secondary & electric choke {about $350 depending on where you buy} or an old style tried & true 750cfm #3310 Holley would work very well also... If it's has a manual transmission you could use a double pumper, but there's also nothing wrong with a good vacuum secondary carb, especially on a car that is or will mostly be street driven, the secondaries only open if you need them, not just because you mashed down on the throttle, like on a Double Pumper... I've also seen many 750cfm Holley style carbs on mostly stock 383ci's run very well...... I hope some of this helped you...

 

[terzmo]

Budnicks,

If I were to go the Holley route, what would you recommend for a stock 383 HP motor sir?

650 holley would work well on stock 383 That same size was on stock 383 challenger r/t

 

[GTX MATT]

If you MUST buy an Eddy get it with MANUAL CHOKE ONLY. They are different carbs/calibrated differently, and from what I can tell it isn't just the jets/rods. The passages do have some variations on some models. NEVER buy the 750 with electric choke, its well documented that that carb is junk. I don't care for them, but a buddy has an 800 AVS on his 440 Dart with a 509 cam. He said it never ran as strong with his 800 and 850 Holleys as it did with the Eddy straight out of the box, and I've been in the car, it rips and has great response.

 

[Mike Z]

I have no experience with Edelbrock
A friend of mine that rebuilt and tuned carbs for a living said If you want to drive to church on Sunday morning with driveability go Edelbrock
If you wanted performance go Holley
My dad has an Edelbrock on his 383 and it works very well.
Mike Z.

 

[rumblefish360]

Great answer Budnicks

GTX Matt, why a manual choke only?

 

[GTX MATT]

The manual choke versions come with a more aggressive calibration. As I said I'm not 100% sure exactly where the differences are other than jets and metering rods, but they seem to be different. The electric choke 750 has been condemned as un-tunable BUT people running manual choke 750s haven't had trouble. I've been told by people who know more than I do that the 750s are absolutely different internally outside of jets and rods. The other carbs I'm not sure but I'd suspect they are as well.

If you look through Edelbrocks listings it even says that the electric choke carbs are calibrated for economy, while the manual choke versions are listed as being calibrated for performance. Economy is code word for SLOW/NOT POWERFUL!!!

 

[747mopar]

Recently came across this, Demon now offers they're version of the Carter available with some kind of non metal float body "said to keep fuel 20 degrees cooler".http://cdn.speednik.com/files/2012/02/street_demon_carb.jpg

 

[Budnicks]

Recently came across this, Demon now offers they're version of the Carter available with some kind of non metal float body "said to keep fuel 20 degrees cooler".http://cdn.speednik.com/files/2012/02/street_demon_carb.jpg

Now that Demon brand is now Owned by the "Holley" conglomerate, I hope that this carb will take off, give people another good alternative to the Eddy/Weber carbs... never had any experiences with any yet

- - - Updated - - -

If you MUST buy an Eddy get it with MANUAL CHOKE ONLY. They are different carbs/calibrated differently, and from what I can tell it isn't just the jets/rods. The passages do have some variations on some models. NEVER buy the 750 with electric choke, its well documented that that carb is junk. I don't care for them, but a buddy has an 800 AVS on his 440 Dart with a 509 cam. He said it never ran as strong with his 800 and 850 Holleys as it did with the Eddy straight out of the box, and I've been in the car, it rips and has great response.

Interesting I hadn't heard that or maybe I just didn't pay enough attention.. that's good to know

 

[71SandbugCharger]

Helps me! What would you suggest for a 650CFM Holley chromed carb for:
'68 383 motor mostly stock, but with improved headers and ignition
Automatic transmission
Los Angeles
Somewhat hot street, but pleasure and drive-able
Chrome appearance.

Thanks!

 

[GTX MATT]

Helps me! What would you suggest for a 650CFM Holley chromed carb for:
'68 383 motor mostly stock, but with improved headers and ignition
Automatic transmission
Los Angeles
Somewhat hot street, but pleasure and drive-able
Chrome appearance.

Thanks!

I wouldn't recommend a chrome Holley on anything! You can't beat the classic zinc dichromate look! But if you must - it wont effect performance. In fact, you know what they say about slow cars, "If it don't go, chrome it!."

650 is good size for a stockish 383, I'd stay with vacuum secondaries if the cam is stock. If you've got 4.10s you can go with something closer to 750 cfm, 3.23s stay around 650. Don't forget a jet kit and a secondary spring kit to play with it.

That Demon/Carter looks interesting. I think its ugly in the way that Demons look like ugly Holleys, but it might work well. Is it a Weber/AFB abortion like the Eddy Performers or is it an AVS? It looks like this is the new line of "Street Demons" which makes sense.

 

[rumblefish360]

The manual choke versions come with a more aggressive calibration. As I said I'm not 100% sure exactly where the differences are other than jets and metering rods, (and the internal statement)

If you look through Edelbrocks listings it even says that the electric choke carbs are calibrated for economy, while the manual choke versions are listed as being calibrated for performance. Economy is code word for SLOW/NOT POWERFUL!!!

I don't see it that way in the word "economy" (code word) for slow. It is easy to see that it is a leaner rod and jet set up.

Some of The fuel passage ways can be seen externally. Though the internal diameter is an unknown, I can not see a single reason why it would change. That is jut not cost effective. And cost/profit is a companies bottom line in order to survive next to a good product to keep the money rolling in.

That Demon/Carter looks interesting. I think its ugly in the way that Demons look like ugly Holleys, but it might work well. Is it a Weber/AFB abortion like the Eddy Performers or is it an AVS? It looks like this is the new line of "Street Demons" which makes sense.

The way I see it, it's a combo carb. Part AVS, part TQ. I like the idea of what I see. On FABO, there is a thread where someone is trying it out.

 

[GTX MATT]

Well tuned for economy is not tuned for performance, so I see it as code for slower. And you're right, it doesn't make sense that anything relating to the casting would be different, but someone found that the electric choke 750 had originally been designed for use on 70s emissions 454 Chevy engines, which is why its almost impossible to tune for overall performance as good as pretty much any other carb out there. All I have to say is I've never heard anyone complain about a manual choke 750 Eddy. It could be limited to just the 750 cfm carb only, who knows? I said above that I don't know that they all do, but if they did one they might do two. Why risk it? When Edelbrock tells you its not a performance calibrated carb that just makes me want to steer clear of it.

 

[MarPar]

"chrome dont getcha home!!"

 

[Durandal25]

"chrome dont getcha home!!"

....lol, I needed that.

 

[rumblefish360]

Well, if there is an internal differance to the carbs, I would love to know what the heck it is. I have tuned each carb to perform just fine on perfoance kills. I'm not saying they were street killer engines, but performance engines. IIRC, the 360 was cammed with a Comp cam at [email protected].

Any lean calibration carb can be enrichened. Though I certainly steer clear of emission era carbs for performance apps.

I have yet to tune up my 750 E-choke carb. I have a main wiring harrnass issue in my Cuda from sitting a long time. I'll letcha know when I get there how it goes or not.

 

[Budnicks]

That new "Street Demon" is 625cfm w/vac. sec. w/electric choke & is a "spread bore" design carburetor, with smaller primaries larger secondaries... I've never ran one, probably never will either, my type builds are generally way above that level of a carb anyway... but I would really like to see what someone who has ran one, who knows what they are talking about, actually thinks of/about them...

 

[99ss]

Having had both recently here is my though for what it is worth.. the Eddy's are ok and less money. The Holley's are better more money.. but a better carb. Never had an issue with the Holley but had a few with the Eddys.. linkage issues and stuff like that... The Holley seemed to perform better as well when accelerating

 

[71SandbugCharger]

Ok, I can make zinc work fine For the Holley 650CFM, 750CFM are there model numbers? If I got to Summit, all I see for my app is a Uremco (was that made by Gemco? ) and at Jegs they are either pushing Edelbrock or Holleys for Fords. Newbe, but learning! Model number series please!!!