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Need help choosing a carburetor for a street 440

Posted By: Meangreen68

Need help choosing a carburetor for a street 440 - 01/18/12 12:38 AM

Looking for advice on choosing the right carb for my rebuilt 440.

It's a 440 quench motor, deck height 10.7109", 3.9" offset-ground factory crank, 6.89" Manley I-beams, Edelbrock 84cc aluminum heads, Diamond flat-tops ch 1.865", Engle K60/62 hyd cam, 727 auto, 3.55 rear, TTI 1-7/8" headers, and I'm after low-end torque. It's around 465 cubic inches. I have a new Weiand 7500 intake that I would like to use. This is a street motor.

I imagine it would be either a manual or electric choke.

The machining was done by Mike Chenoweth in 2004 and it's still in the crate: http://www.kufrin.biz/1968Charger

Once assembled I would like to deliver it to a Mopart's member to have it broken in and tuned on a bench dyno. So I could use some suggestions as to who is available on the east coast. I'm willing to have it assembled by them if it's their policy. Piston rings need to be fitted and Smith Bros. pushrods need to be ordered.

I can also use some help selecting a good torque converter.

Thanks, John
Posted By: Pacnorthcuda

Re: Need help choosing a carburetor for a street 440 - 01/18/12 12:44 AM

If you're not after every last top end HP then a Holley 750 Vacuum Secondary would suit well.
Posted By: Bill MeLater

Re: Need help choosing a carburetor for a street 440 - 01/18/12 01:13 AM

Holley 850
Posted By: MoparforLife

Re: Need help choosing a carburetor for a street 440 - 01/18/12 01:14 AM

Quote:

If you're not after every last top end HP then a Holley 750 Vacuum Secondary would suit well.

I agree. And little tuning and adding the secondary metering block it would be a very good street carb
Posted By: Anonymous

Re: Need help choosing a carburetor for a street 440 - 01/18/12 01:30 AM

AED a sponsor here is the best deal on a handbuilt proper carb for any application--please call them before you buy
Posted By: Meangreen68

Re: Need help choosing a carburetor for a street 440 - 01/18/12 01:42 AM

I can't thank you guys enough.

Should I wait on purchasing the torque converter until I have some bench dyno numbers?

The engine is going into a '68 Charger.
Posted By: RapidRobert

Re: Need help choosing a carburetor for a street 440 - 01/18/12 01:47 AM

I'd suggest as mentioned a 750ish Holley but one of the Holley clones that has adjustable systems so you can get it spot on & not leave anything on the table
Posted By: BSB67

Re: Need help choosing a carburetor for a street 440 - 01/18/12 02:21 AM

Changing nothing that you listed: 950 hp if it's in your budget. If not, a 850 DP.

Don't skimp on a converter. You'll have to decide what you like as far as stall.
Posted By: 451Mopar

Re: Need help choosing a carburetor for a street 440 - 01/18/12 02:36 AM

I just bought a Holley Ultra Street Avenger for my 440 stroked to 500" (I know it's small, but it's a street car.) I thought it would have screw-in restrictors in the billet metering blocks, but it has pressed in restrictions. I could have saved some money with just the aluminum street avenger, but the ultra does look nice (avaliable in red, blue and black)
Posted By: MidPenMopar

Re: Need help choosing a carburetor for a street 440 - 01/18/12 02:36 AM

Hi John Ive got a nice 750 Holley that's a dual feed single pump if you are interested?
Posted By: Anonymous

Re: Need help choosing a carburetor for a street 440 - 01/18/12 02:46 AM

Holley's 750 3310 is perfect for a street driver 440.

Get the trick kit (are they still available?) or just the spring set and tune the secondary's where they open to your liking.

I always found the jetting in the primary side (72 or 74 IIRC) to be pretty much spot on for a mild 440.

Get the throttle extension lever 20-7 for Mopar applications and the Fabulous Fabrication fuel lines and they practically fall into place!

Attached picture 7023993-newfuelline.JPG
Posted By: Meangreen68

Re: Need help choosing a carburetor for a street 440 - 01/18/12 04:18 AM

The last request is finding a Mopar engine shop with a bench dyno.

Early March time-frame is what I'm figuring. That puts the weather, not so bad north of the Carolina's where I live, and south to Florida.

Anyone with any leads, please chime in.

Moparts rocks!
Posted By: 451Mopar

Re: Need help choosing a carburetor for a street 440 - 01/18/12 08:38 AM

gy3 - I like the fuel line setup
Is that custom or where can I buy one?
Posted By: Von

Re: Need help choosing a carburetor for a street 440 - 01/18/12 04:14 PM

Quote:

Holley 850




The fuel curve on a stock 850 will be pretty close for you....

The fuel curve on a 950 is generally pig fat on the lower end for a 440.

If you have a AFR gauge and time to tinker a 950 might be OK...but you will have to invest some time in tinkering with it.

Throttle response a hair better with a 950 over the 850 though.
Posted By: fiddlerfingers

Re: Need help choosing a carburetor for a street 440 - 01/18/12 07:33 PM

Check out http://bigsperformance.com/ they build some awesome carbs. Tell them what cam, headers ect and he will have the data in his files to build you a carb that is practically out of the box correct.
Posted By: Meangreen68

Re: Need help choosing a carburetor for a street 440 - 01/18/12 09:08 PM

I drove down to Willow Spring, NC this morning to visit Doc Bilbrey.

He's going to help me get the engine together and run on his dyno.

He likes the 950hp carb, but I'll send him a link to the comments posted here about one.

He said not to use the TTI 1-7/8" headers on break-in but to buy a set of Hooker headers and he'll provide the 18mm bungs for the a/f sensors. He had headers for the 440 but the tubes were over 2-1/4" in diameter.

He's going to fit me in mid-March which gives me time to collect the remaining parts like the carb, aluminum water pump housing, ATI damper, and a distributor. He doesn't mind me helping out either, which is cool.

Doc said he was semi-retired but looking in his engine room, he had no less than 11 engine projects going on.
Posted By: 451Mopar

Re: Need help choosing a carburetor for a street 440 - 01/18/12 10:08 PM

Quote:

I drove down to Willow Spring, NC this morning to visit Doc Bilbrey.

He's going to help me get the engine together and run on his dyno.

He likes the 950hp carb, but I'll send him a link to the comments posted here about one.

He said not to use the TTI 1-7/8" headers on break-in but to buy a set of Hooker headers and he'll provide the 18mm bungs for the a/f sensors. He had headers for the 440 but the tubes were over 2-1/4" in diameter.

He's going to fit me in mid-March which gives me time to collect the remaining parts like the carb, aluminum water pump housing, ATI damper, and a distributor. He doesn't mind me helping out either, which is cool.

Doc said he was semi-retired but looking in his engine room, he had no less than 11 engine projects going on.



950 is a good carb for power, and pretty decent on the street. If your car is more a weekend toy it will work good. If the car is a daily driver then a smaller carb with choke would be a better choice for easier driving in cold weather, and to get into the main jet circuitry sooner at low speed to improve fuel mileage.
I never have used a proform carb, but I was looking at the jegs catalog and they have a 750 cfm vacuum secondary carb with all the goodies like notched rear float and jet extentions, and screw-in air bleads and restrictions for $430.
Posted By: BSB67

Re: Need help choosing a carburetor for a street 440 - 01/19/12 01:03 AM

Quote:

Quote:

Holley 850




The fuel curve on a stock 850 will be pretty close for you....

The fuel curve on a 950 is generally pig fat on the lower end for a 440.

If you have a AFR gauge and time to tinker a 950 might be OK...but you will have to invest some time in tinkering with it.

Throttle response a hair better with a 950 over the 850 though.



This about sums it up IMO. However, I'm curious, is there something that the 950 is not pig fat on in in low rpm and transition?

The 950 will be similar to the 750 for response, once the IFR is adjusted.
Posted By: Anonymous

Re: Need help choosing a carburetor for a street 440 - 01/19/12 01:52 AM

Quote:

gy3 - I like the fuel line setup
Is that custom or where can I buy one?



Greg at Fabulous Fabrications.

Sorry, I don't have a number or address handy but they advertise in Mopar Collectors Guide.
Posted By: Von

Re: Need help choosing a carburetor for a street 440 - 01/19/12 04:06 AM

[quote However, I'm curious, is there something that the 950 is not pig fat on in in low rpm and transition?





Porter told me that box stock 950 metering systems are pretty close on the usual run of the mill SBC builds....
Posted By: Meangreen68

Re: Need help choosing a carburetor for a street 440 - 01/19/12 05:14 AM

What do you guys think about a HO-series 850 carb from AED?

http://www.aedperformance.com/HO.htm

They're racing carbs so I imagine that there's no option for a manual choke?

If not, I'll spring for a new 850DP w/manual choke.

I agree, the Fabulous Fabrications fuel lines look good. I'm sold on them too.



Attached picture 7025968-Holley850small.jpg
Posted By: gch

Re: Need help choosing a carburetor for a street 440 - 01/19/12 12:16 PM

AED makes some nice carbs as well.You don't need a choke it is a hot rod.

Doc did my last two builds and dynoed them both.I have an old pair of super comp c body headers if you want to borrow them.They are 1 3/4 though.1 7/8 would be better.

Doc knows his way around a mopar.He raced them many years ago before he went to a sbc rail and pro stock truck.


I need to drop in and see the old dinosaur.
Posted By: Meangreen68

Re: Need help choosing a carburetor for a street 440 - 01/19/12 07:38 PM

Just got off the phone with Jeff at AED.

He recommends a Holley 850DP with annular boosters.

The carb would be wet-flow tested, they will pretty much nail the jetting, and that the carb will be fine without a choke.

The mods place it in the custom-made variety. It costs a little more.

Thanks to everyone.
Posted By: 469runner

Re: Need help choosing a carburetor for a street 440 - 01/20/12 12:25 AM

That will be a great carburetor for you. I never run chokes, or choke towers on my stuff. Pump the gas a couple times and it'll fire right up. Just feather the throttle a little until it has been running a couple minutes. These Holleys are great.
Posted By: dOoC

Re: Need help choosing a carburetor for a street 440 - 01/20/12 12:30 AM

.....
Posted By: Anonymous

Re: Need help choosing a carburetor for a street 440 - 01/20/12 01:10 AM

Quote:

That will be a great carburetor for you. I never run chokes, or choke towers on my stuff. Pump the gas a couple times and it'll fire right up. Just feather the throttle a little until it has been running a couple minutes. These Holleys are great.



Ditto.

I have had them on everything from a 360 headed 318 to a torque monster 360 to a couple of mild 440's and they work well on all of them.

They do start a little better in the winter with a manual choke but as you said, I just pump the throttle a couple of times and let the motor warm up.
Posted By: Bill MeLater

Re: Need help choosing a carburetor for a street 440 - 01/20/12 02:24 AM

Yup...Holley 850
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