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best carb for a 440 #2162065
09/26/16 02:00 PM
09/26/16 02:00 PM
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NY
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moparmatt0 Offline OP
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I have a 67 gtx with a 440 with 440 source heads and 10.1 compression it has a 557 lift soild mopar cam and a m1 intake 4:56 gears rarly driven on the street what would be the best carb thanks for the help.

Re: best carb for a 440 [Re: moparmatt0] #2162087
09/26/16 02:36 PM
09/26/16 02:36 PM
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Oregon
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AndyF Offline
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Sounds like maybe 550 hp type engine so I'd go with a 750DP carb. An 850DP might make a little more top end power.

You could contact BradH and offer to do some carb testing for him. Might be a win/win for you guys!

Re: best carb for a 440 [Re: moparmatt0] #2162138
09/26/16 03:58 PM
09/26/16 03:58 PM
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So. Burlington, Vt.
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fast68plymouth Offline
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Quick fuel "Q-850".
Those have the 1.750 throttle bore with a 1.400 Venturi.


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
Re: best carb for a 440 [Re: moparmatt0] #2162164
09/26/16 04:34 PM
09/26/16 04:34 PM
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Minnesota, USA
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minnesota guy Offline
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I have a 500HP 440 in my 71 Cuda. Old school set up with 520 hyd Racer Brown cam and Holley SD. I own both the 750 and 850 DP. Playing with both jetting, they are so close it was no longer worth my time swapping back and forth.

If you have a choice--the 750DP will be better. Chuck Lofgren verified this when he was running his 70 440 Cuda at BIR.

Provided you are in the old school build type.

Re: best carb for a 440 [Re: moparmatt0] #2162186
09/26/16 04:59 PM
09/26/16 04:59 PM
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Thumperdart Offline
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850 dp minimum imo.............


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: best carb for a 440 [Re: Thumperdart] #2162433
09/26/16 10:11 PM
09/26/16 10:11 PM
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Bend,OR USA
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Cab_Burge Offline
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Originally Posted By Thumperdart
850 dp minimum imo.............
iagree
the right foot determines how far the throttle plates are opened, even at WOT work
Every Mopar B or RB motor I've palyed with loved more air and fuel, even sixpaks or tunnel rams shruggy


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: best carb for a 440 [Re: moparmatt0] #2162438
09/26/16 10:21 PM
09/26/16 10:21 PM
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Australia
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ozymaxwedge Offline
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I agree with ^^ these guys as well and 850 will allow you to make a few other mods to the engine retaining the carb.


1963 Plymouth Max Wedge
1971 Barracuda
Re: best carb for a 440 [Re: moparmatt0] #2162448
09/26/16 10:46 PM
09/26/16 10:46 PM
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Romeo MI
MR_P_BODY Offline
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One thing no one has asked.. is this a trans brake
or foot brake car.. a trans brake can use a big carb
but a foot brake car you have to have good throttle
response to get the rpm... I was running a 1050 on
a 405ci but with a trans brake
wave

Re: best carb for a 440 [Re: moparmatt0] #2162449
09/26/16 10:47 PM
09/26/16 10:47 PM
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Jacksonville, FL
Chris2581 Offline
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My 440 has run best using a 750 Holley DP carb.The 850 didn't work as well.


Nautilus Racing-
We use Superformance gaskets and Turbo Action converters/products.
Re: best carb for a 440 [Re: Chris2581] #2162457
09/26/16 10:54 PM
09/26/16 10:54 PM
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Wichita
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GY3 Offline
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I have an 850 Speed Demon on a very similar combo. It starts, runs and drives flawlessly. Very happy with it.


'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.

Re: best carb for a 440 [Re: moparmatt0] #2162768
09/27/16 12:31 PM
09/27/16 12:31 PM
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Puyallup, WA
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StealthWedge67 Offline
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My own experience would suggest you'll be leaving a LOT on the table with a 750. My 451 has an 830DP on it and it runs pretty good on the street, but I suspect it could be making more power up top at WOT with a bigger carb. OP is running 4.56's and an M1, both of which want RPM's. I would be thinking 850 minimum, larger (4150 -1000) would likely make more power and be my choice, especially for a car that is used almost solely at the track as the OP describes.
twocents


LemonWedge - Street heavy / Strip ready - 11.07 @ 120
Re: best carb for a 440 [Re: StealthWedge67] #2162771
09/27/16 12:32 PM
09/27/16 12:32 PM
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Marion, South Carolina [><]
an8sec70cuda Offline
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iagree The smallest carb I'd run on a healthy 440 would be an 830.


CHIP
'70 hemicuda...8 sec street car
'69 road runner 440 w/ Indy SRs
'69 road runner 440-6, 4 speed
'71 Demon 340
'73 Chrysler New Yorker
'90 Chevy 454SS Silverado
'06 GMC 2500HD LBZ Duramax...toy hauler
Re: best carb for a 440 [Re: moparmatt0] #2162776
09/27/16 12:39 PM
09/27/16 12:39 PM
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Aurora, Colorado
451Mopar Offline
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If it really is not driven much on the street, and mostly a track car, then use a big carb. I like the 950-1,000 HP type with annular boosters.

Re: best carb for a 440 [Re: moparmatt0] #2162780
09/27/16 12:41 PM
09/27/16 12:41 PM
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Portage,michigan
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B3422W5 Offline
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I took a 950 off my little 318 and put on a 750, slowed the car down a tenth. Picked it right back up putting 950 back on.
So with a bigger motor I suspect the results would favor a bigger carb


69 Dart GTS A4 Silver All steel, flat factory hood, 3350 race weight
418 BPE factory replacement headed stroker
Best so far, 10.68 at 124.48
1.44 best 60 foot.
6.76 at 101.63 best 1 /8

Re: best carb for a 440 [Re: moparmatt0] #2162781
09/27/16 12:42 PM
09/27/16 12:42 PM
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central texas
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krautrock Offline
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i just picked up an 830Hp 4150 for cheap, then started doing some reading, it has the 1.56" venturi.

i would maybe look for a holley 950DP, as the venturi is smaller than the 830 and 850 holley carbs, might work better.
maybe consider picking up a clean used one (any of the above ^) and send it to Thumprdart to get adjusted...


Last edited by krautrock; 09/27/16 12:42 PM.
Re: best carb for a 440 [Re: moparmatt0] #2162856
09/27/16 02:51 PM
09/27/16 02:51 PM
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W. Kentucky
justinp61 Offline
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Years ago I ran a 850DP on a very mild 440 and it worked great. My 434 small block has a BLP main body with 1.590" venturi on a holley 1.75 base plate and works great for street/strip, according to BLP it's 1050-1100 cfm.

Re: best carb for a 440 [Re: justinp61] #2162911
09/27/16 03:41 PM
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fullmetaljacket Offline
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Ran an 830 DP years ago on a mild stock bore 440 with a 528 flat tappet purple cam. 10.1 compression and it ran great on the street and track at 3600 + lbs.

Re: best carb for a 440 [Re: fullmetaljacket] #2162943
09/27/16 04:10 PM
09/27/16 04:10 PM
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AndyF Offline
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Originally Posted By fullmetaljacket
Ran an 830 DP years ago on a mild stock bore 440 with a 528 flat tappet purple cam. 10.1 compression and it ran great on the street and track at 3600 + lbs.


I'd think that you would want to run an Edelbrock carb on your setup since they weigh a lot less than a Holley. (although the newest all aluminum Holley carbs are getting to be fairly lightweight)

Re: best carb for a 440 [Re: AndyF] #2162995
09/27/16 05:07 PM
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Thumperdart Offline
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I surely wouldn't recommend a carb based on weight and NOTHING including efi out performs a Holley carb in single and dual applications.........


72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
Re: best carb for a 440 [Re: AndyF] #2163030
09/27/16 05:51 PM
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fullmetaljacket Offline
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Andy.

That was before I got the 1 Flu over the cuckoos nest weight loss sickness.

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