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Carb selection for mild 383 4-spd 3:54 rear end #1457219
06/23/13 04:47 PM
06/23/13 04:47 PM
Joined: Dec 2011
Posts: 120
Vancouver,Canada
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70 Roadrunner* Offline OP
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Vancouver,Canada
I've just rebuilt my 383 in my 70RR and am looking at getting a new carb.The engine is running a Comp Cams hydraulic flat tappet XE274H...488/491 valve lift.It's an air grabber car so I went with the Edelbrock DP4b intake.It's bored .030 over,flat-top pistons and stock HP exhaust manifolds through an entire 2 1/2 mandrel bent system.It's a 4-spd with 3:54 gears and I was thinking along the lines of a Holley 750 double pumper or a Quick Fuel HR series 750...anyone with any experience along these lines?
I'm a novice at this so if I missed something take that in mind...I was figuring a 750 DP would be good.I'm planning on TTI headers down the road...any help would be great,thanks

Dave

Re: Carb selection for mild 383 4-spd 3:54 rear end [Re: 70 Roadrunner*] #1457220
06/23/13 05:07 PM
06/23/13 05:07 PM
Joined: Jan 2003
Posts: 16,373
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dogdays Offline
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dogdays  Offline
I Live Here
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Joined: Jan 2003
Posts: 16,373
Holley Street Avenger 770.
Or Edelbrock 800, either AFB or AVS.
Quadrajet or Tquad
R.

Re: Carb selection for mild 383 4-spd 3:54 rear end [Re: dogdays] #1457221
06/23/13 06:07 PM
06/23/13 06:07 PM
Joined: Aug 2003
Posts: 12,291
Kent, Wa
340SHORTY Offline
Truck Nut
340SHORTY  Offline
Truck Nut

Joined: Aug 2003
Posts: 12,291
Kent, Wa
Holley 3310 all the way.


I am truckless..
Re: Carb selection for mild 383 4-spd 3:54 rear end [Re: 340SHORTY] #1457222
06/23/13 06:57 PM
06/23/13 06:57 PM
Joined: Nov 2007
Posts: 21,177
Kirkland, Washington
Pacnorthcuda Offline
Too Many Posts
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Posts: 21,177
Kirkland, Washington
Quote:

Holley 3310 all the way.




The car in question is a 4 speed...I'd go with a 750 dp

Re: Carb selection for mild 383 4-spd 3:54 rear end [Re: Pacnorthcuda] #1457223
06/23/13 08:56 PM
06/23/13 08:56 PM
Joined: Mar 2005
Posts: 3,033
Central NC
gch Offline
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gch  Offline
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Posts: 3,033
Central NC
It doesn't need any more than a 750.What kind??That is up to you.I really like the Holley HP series.I have a couple of the older ones and they have been great.I also have a plain old 3310 vacuum secondary with a milled choke horn and a metering block kit in the rear that has been flawless for 20 years and run on everything from a 350 to a 427BBC to my 496 stroker.
The bottom line is what ever you get you will have to tune it some to get the best drive ability out of it.I had screw in air bleeds put in mine and the tuned on a dyno so I know the fuel curve is spot on.
Your car will run fine with a DP or a vac secondary.The choice is up to you.I still favor vacuum secondary carbs that are street driven more than not.They feel crisper and if the secondary spring is correct you have no performance loss IMO.You can get away with a slightly larger carb this way also without it stumbling around at part throttle in a higher gear.

Re: Carb selection for mild 383 4-spd 3:54 rear end [Re: 70 Roadrunner*] #1457224
06/23/13 11:03 PM
06/23/13 11:03 PM
Joined: Feb 2005
Posts: 4,174
Prospect, PA
BSB67 Offline
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BSB67  Offline
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Posts: 4,174
Prospect, PA
4779

Re: Carb selection for mild 383 4-spd 3:54 rear end [Re: BSB67] #1457225
06/24/13 10:08 AM
06/24/13 10:08 AM
Joined: Mar 2008
Posts: 5,741
Ontario, Canada
Dodgem Offline
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Ontario, Canada
Quote:

4779






If it's a 4 speed a 750 Double Pumper

Re: Carb selection for mild 383 4-spd 3:54 rear end [Re: Dodgem] #1457226
06/24/13 10:16 AM
06/24/13 10:16 AM
Joined: Aug 2006
Posts: 2,112
junction city oregon
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viperblue72 Offline
top fuel
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junction city oregon
Quote:

Quote:

4779






If it's a 4 speed a 750 Double Pumper





Re: Carb selection for mild 383 4-spd 3:54 rear end [Re: 70 Roadrunner*] #1457227
06/24/13 11:55 AM
06/24/13 11:55 AM
Joined: Nov 2003
Posts: 35,913
Lincoln Nebraska
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RapidRobert Offline
Circle Track
RapidRobert  Offline
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Lincoln Nebraska
You said mild 383 & street driven. As said several good ways to go. A correctly functioning OE thermoquad, one with 1&1/2" primaries (850 CFM). Several of the Eddies except for the infamous #1407 750. If a holley then one of the clones with the adjustable circuits


live every 24 hour block of time like it's your last day on earth
Re: Carb selection for mild 383 4-spd 3:54 rear end [Re: RapidRobert] #1457228
06/24/13 12:16 PM
06/24/13 12:16 PM
Joined: Oct 2012
Posts: 1,106
Northeast
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VincentVega Offline
super stock
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Joined: Oct 2012
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Northeast
t-quad


Looking for 1975 through 1978 B body 4 door sedan sheet metal or parts cars - monaco, fury, coronet. Please let me know
Re: Carb selection for mild 383 4-spd 3:54 rear end [Re: RapidRobert] #1457229
06/24/13 04:50 PM
06/24/13 04:50 PM
Joined: Mar 2004
Posts: 2,536
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wunderless Offline
master
wunderless  Offline
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Quote:

You said mild 383 & street driven. As said several good ways to go. A correctly functioning OE thermoquad, one with 1&1/2" primaries (850 CFM). Several of the Eddies except for the infamous #1407 750. If a holley then one of the clones with the adjustable circuits




Why not the 1407?


But existing is basically all I do.
Re: Carb selection for mild 383 4-spd 3:54 rear end [Re: wunderless] #1457230
06/24/13 05:23 PM
06/24/13 05:23 PM
Joined: Nov 2003
Posts: 35,913
Lincoln Nebraska
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RapidRobert Offline
Circle Track
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Lincoln Nebraska
Quote:

Why not the 1407?


Way too many reported issue with them. Enough that I would be leery of it tho I'm sure alot of em are fine. I do have one that the guy said ran OK but needs rebuilt so I got it for cheap. It's my first one & I'm fixing to find out first hand. It'd be the perfect size for my upcoming street 451.


live every 24 hour block of time like it's your last day on earth
Re: Carb selection for mild 383 4-spd 3:54 rear end [Re: RapidRobert] #1457231
06/24/13 05:31 PM
06/24/13 05:31 PM
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Posts: 2,536
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wunderless Offline
master
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Quote:

Quote:

Why not the 1407?


Way too many reported issue with them. Enough that I would be leery of it tho I'm sure alot of em are fine. I do have one that the guy said ran OK but needs rebuilt so I got it for cheap. It's my first one & I'm fixing to find out first hand. It'd be the perfect size for my upcoming street 451.




Okay. Thanks.
Odd you mentioned it as that's what I have on my 383 and it seems to be running rich. I have gone down a metering rod but its still rich. Granted I am trying to learn about carbs and am very novice when trying to understand them. That's why I asked.


But existing is basically all I do.
Re: Carb selection for mild 383 4-spd 3:54 rear end [Re: RapidRobert] #1457232
06/24/13 05:31 PM
06/24/13 05:31 PM
Joined: Nov 2003
Posts: 542
WV
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JohnH Offline
mopar
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Posts: 542
WV
No more holley's for me, Go Edelbrock

Re: Carb selection for mild 383 4-spd 3:54 rear end [Re: wunderless] #1457233
06/24/13 05:44 PM
06/24/13 05:44 PM
Joined: Nov 2003
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Lincoln Nebraska
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RapidRobert Offline
Circle Track
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Lincoln Nebraska
Quote:

that's what I have on my 383 and it seems to be running rich.


Actually the multiple reported problems are the internal metering circuits are screwed up somehow & there's severe driveability problems & not just runnning rich & nobodys' figured out what's going on with them. With you just running rich you may have one of the good ones. On yours when is it rich? idle/cruise/power. #1 the idle fuel psi must be below 5.5 psi with a known accurate gauge (alot of gauges are inaccurate). Then as you know float level then the rods/jets/springs depending if the issue is on the cruise or the power circuit. I like Eddies & my 1406 starts/runs flawless ex the choke vac break is messed up & I need a good reg to drop the psi.


live every 24 hour block of time like it's your last day on earth
Re: Carb selection for mild 383 4-spd 3:54 rear end [Re: RapidRobert] #1457234
06/24/13 07:44 PM
06/24/13 07:44 PM
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wunderless Offline
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Thanks! Seems to be mostly at cruise and start up.
Float is the next thing I'm looking at. I'm just starting to learn as about carbs as I always found them daunting and mystifying.


But existing is basically all I do.
Re: Carb selection for mild 383 4-spd 3:54 rear end [Re: 70 Roadrunner*] #1457235
06/24/13 10:52 PM
06/24/13 10:52 PM
Joined: Oct 2003
Posts: 3,859
South Park, Pa.
68LAR Offline
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MY 750 - 800cfm "Q" series Quick fuel. Definitly has to be a double pumper with a stick car.


4 speed street legal. Best time 10.99 @ 124 mph on 93 octane pump gas @ 3926# total weight
Re: Carb selection for mild 383 4-spd 3:54 rear end [Re: 68LAR] #1457236
06/25/13 01:58 PM
06/25/13 01:58 PM
Joined: Dec 2011
Posts: 120
Vancouver,Canada
7
70 Roadrunner* Offline OP
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Vancouver,Canada
Guys thanks for helping out this rookie with all your info.From what I gather it's a Holley or Quick Fuel DP carb and tune it as I go along.Both those carbs appear to have the most room for adjustments,etc.Thanks again for all the input...

Dave

Re: Carb selection for mild 383 4-spd 3:54 rear end [Re: 70 Roadrunner*] #1457237
06/25/13 02:03 PM
06/25/13 02:03 PM
Joined: Mar 2005
Posts: 1,936
Pendleton NY
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terzmo Offline
top fuel
terzmo  Offline
top fuel
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Joined: Mar 2005
Posts: 1,936
Pendleton NY
proform...alot of features...750 dual feed/double pump







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