Need help choosing a carburetor for a street 440
#1159578
01/17/12 08:38 PM
01/17/12 08:38 PM
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Joined: Apr 2004
Posts: 323 Raleigh, NC
Meangreen68
OP
enthusiast
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OP
enthusiast
Joined: Apr 2004
Posts: 323
Raleigh, NC
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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
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Re: Need help choosing a carburetor for a street 440
[Re: MoparforLife]
#1159582
01/17/12 09:30 PM
01/17/12 09:30 PM
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Anonymous
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Anonymous
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AED a sponsor here is the best deal on a handbuilt proper carb for any application--please call them before you buy
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Re: Need help choosing a carburetor for a street 440
[Re: MidPenMopar]
#1159588
01/17/12 10:46 PM
01/17/12 10:46 PM
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Anonymous
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Anonymous
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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!
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Re: Need help choosing a carburetor for a street 440
[Re: Bill MeLater]
#1159591
01/18/12 12:14 PM
01/18/12 12:14 PM
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Joined: Oct 2003
Posts: 3,698 NE Oklahoma
Von
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master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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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.
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: Need help choosing a carburetor for a street 440
[Re: Meangreen68]
#1159592
01/18/12 03:33 PM
01/18/12 03:33 PM
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Joined: Jan 2010
Posts: 27 Michigan
fiddlerfingers
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Joined: Jan 2010
Posts: 27
Michigan
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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.
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Re: Need help choosing a carburetor for a street 440
[Re: Meangreen68]
#1159594
01/18/12 06:08 PM
01/18/12 06:08 PM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
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Joined: May 2008
Posts: 5,399
Aurora, Colorado
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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.
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Re: Need help choosing a carburetor for a street 440
[Re: Von]
#1159595
01/18/12 09:03 PM
01/18/12 09:03 PM
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Joined: Feb 2005
Posts: 4,318 Prospect, PA
BSB67
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master
Joined: Feb 2005
Posts: 4,318
Prospect, PA
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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.
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Re: Need help choosing a carburetor for a street 440
[Re: 451Mopar]
#1159596
01/18/12 09:52 PM
01/18/12 09:52 PM
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Anonymous
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Anonymous
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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.
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Re: Need help choosing a carburetor for a street 440
[Re: BSB67]
#1159597
01/19/12 12:06 AM
01/19/12 12:06 AM
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Joined: Oct 2003
Posts: 3,698 NE Oklahoma
Von
master
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master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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[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....
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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