Carb choice, Holly or Eledebrock?

[moparfanUSA]

I have a 69 440 that I have rebuilt and have had the one from the factory rebuilt twice, but it still does not work right, so I put an Eldelbrock on it last year, but when it was rebuilt and put on the dyno it was down on HP, so the builder put on his Holly and the HP was back to normal.

I want to know if anyone is using a Holly on their 440. I am going with the street avenger carb. The holly's are much longer than the factory or Eldelbrock carbs, so will it mount up ok?
Any comments would help.
Thanks

 

[YY1]

It's been my experience that Holleys dump more raw gas (or fuel mixture) into the motor, but for the life of me, I can't get one to be consistant or maintain a set idle speed for more than 2 days. My one experience with Eddy was pretty much a bolt on and go. Much easier to adjust and keep adjusted, but perhaps, as you say, not quite the horsepower inducer.

 

[74Satellite]

It's been my experience that Holleys dump more raw gas (or fuel mixture) into the motor, but for the life of me, I can't get one to be consistant or maintain a set idle speed for more than 2 days. My one experience with Eddy was pretty much a bolt on and go. Much easier to adjust and keep adjusted, but perhaps, as you say, not quite the horsepower inducer.

I agree with YY1, from my experiences, Hollys have longer durability and IMHO are a better carb but do require a ton of maintenace and adjustment. Edelbrocks although didnt last as long required much less work.

 

[moparfanUSA]

carb

Thanks for the input, I am suprised to hear about the holly's. I spoke with them and they (holly) tell me with the street avenger carbs, there is only 2 things you can adjust, and it is easy to change jets. I'll keep trying to research it.

 

[Ron 73]

Im not at this time running the 440 but having used both Carbs on a few different cars one being a 383 the Holly worked great on it . The Holly seem to love all out going that, ive found out and like everyone says the Eddy is, ill put it more user friendly. Holly would be my pick, and depending on whats been done to the engine the Holly would work much better. they do seem to need adjusted a lot that i learned quick. A guy told me once and i do tend to agree with him the Holly is for all out GO. Ron

 

[Meep-Meep]

I have an AFB carb (Edelbrock) on my 440 and it runs great. I have also run Holley's with good success. To me the AFB runs crisper and cleaner so it makes a good street carb. As far as Holley's go (carbs in general) you want to make sure you have the correct one for your application. The typical DP's and other high perf models are tuned for racing and don't have the low speed circuit dialed in for part throttle drivability like the AFB does. There are replacement Holley's that are designed for street use and they work fine. In my opinion the AFB design is better than the Holley for daily use. Partly because there is no fuel across a gasket, thus minimizing leaks, and they don't have the needle and seat leaking o-ring issue, which causes the carb to flood.

Years ago on a test and tune day at the track I was running a 440 AVS on my 383. I figured it was set up lean from the factory so I started with bigger jets and made a pass. Then for fun I leaned it out a bit and the car went faster. I did it again and it went faster yet. On the last jet installation I noticed I had stock jets in it.

 

[rumblefish360]

Between the AFB and the AVS, go for the AVS style. The secondary door is adjustable when it opens up.

 

[moparfanUSA]

carb

ok, sounds like most vote for Edelbrock. I'll go with the AVS, but should I go with a 650 or the 800cfm?

 

[Ron 73]

750 Heck I had a 750 double pumper on my 69 RR on a 383 and she loved it. Cant see why a 800 wouldn't work..

 

[moparfanUSA]

carb

anyone know what the max RPM is for a 440?

 

[Ron 73]

If your engine is stock original id guess 375 at about 4600 rpm This is just my guess at it. So much depends on what, if anything you've done or had done to the engine, headers alone will add to HP.

 

[moparfanUSA]

carb

no headers..all stock. I looked at Edlebrock's carb Calulator, and at 5000rpm it calls for a 600 cfm carb. so the 650 should work ok.

 

[rumblefish360]

That will be absouletly fine. The OE carb size for the ol'land yachts were 600 cfm AFB's. Small necked Secondary doorless units.

 

[SUPERSTOCKRACER]

ok, sounds like most vote for Edelbrock. I'll go with the AVS, but should I go with a 650 or the 800cfm?

go with the afb edelbrock 800. much easier to tune. the avs thunder series is a pita to adjust the secondaries.i have a brand new set if your interested.ive been playing with carters and edelbrocks for years. the best for driveability .imo.

 

[rumblefish360]

go with the afb edelbrock 800. much easier to tune. the avs thunder series is a pita to adjust the secondaries.i have a brand new set if your interested.ive been playing with carters and edelbrocks for years. the best for driveability .imo.

Saaaaaaaay what!?!?! 2 screw flat head drivers to adjust.

 

[SUPERSTOCKRACER]

Saaaaaaaay what!?!?! 2 screw flat head drivers to adjust.

yeah right.too loose and your secondaries open too fast causing a lean condition,causing a major bog off the line. too many variables affecting the outcome of the carb. It will take a ton of tuning to get them right. For track conditions the afb is your best choice.

 

[Ron 73]

no headers..all stock. I looked at Edlebrock's carb Calulator, and at 5000rpm it calls for a 600 cfm carb. so the 650 should work ok.

moparfanUSA, I didn't say the 650 wouldn't work I just thought and still do that the 750 or 800 would be a better application.. Choice is yours..

 

[rumblefish360]

Hum, never had that problem plauge me. I also have not yet got my hands on the Edel. AVS hybred version. Mostly, it's an OE design I have layin around. They don't take to big cms to well.

I figure tighten it up a tad much rtather than loose. Track use or not to keep the opening steady. It's not excatly the carb I'd go racing for money with. But Like'em I do.

 

[rumblefish360]

moparfanUSA, I didn't say the 650 wouldn't work I just thought and still do that the 750 or 800 would be a better application.. Choice is yours..

Alot depends on RPM turned and arena the car is driving in.

04-19-2011 05:22 PM
Ron 73 If your engine is stock original id guess 375 at about 4600 rpm This is just my guess at it. So much depends on what, if anything you've done or had done to the engine, headers alone will add to HP.

04-19-2011 06:04 PM
moparfanUSA carb

no headers..all stock. I looked at Edlebrock's carb Calulator, and at 5000rpm it calls for a 600 cfm carb. so the 650 should work ok.

 

[Ron 73]

"Alot depends on RPM turned and arena the car is driving in." Couldn't agree more... Have no clue how the man drives, races ect.. Later on IF he decides to up the HP he already has a carb where as He might be looking larger IF things change. I didn't mean to start some argument, ive had them, i know they will work . It was and is just my opinion thats all..