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carburetor recommendation

Posted By: BigBlockScamp

carburetor recommendation - 12/05/10 11:00 PM

What carburetor would you guys recommend for a daily driver 440 truck? It is a mild 440 (9.5:1, maybe 400 hp). I would like maintain a hint of mileage at least.

I'm currently running a 750 cfm vacuum secondary Edelbrock #1407. I'm chasing a stumble and have gone through it several times and am looking to move on and try something different. I'm considering an Edelbrock AVS.


Thanks.
Posted By: amxautox

Re: carburetor recommendation - 12/05/10 11:35 PM

Eddy, but not the 750. Almost every 750 they made stumble. I've had GREAT responce out of every Eddy carb I've used.
Posted By: 79powerwagon

Re: carburetor recommendation - 12/05/10 11:45 PM

Spread-bore. A well tuned spread-bore on a well tuned engine.
I'm a HUGE fan of the Eddy/Carter AFB's, but if you want fuel economy, you're off to the wrong start with both your vehicle AND carb choice!

FWIW, my 79 PW had a 360 with an Eddy 600 and I got 8mpg on a good day. And I drove this thing daily for a decade,and 8mpg was about it! It was FAST and it was RELIABLE to a fault, but HUNGRY!
Posted By: 79powerwagon

Re: carburetor recommendation - 12/05/10 11:46 PM

And you need to read and understand the manual for the Eddy carbs. They also really like a 4-hole spacer under them.
Posted By: RapidRobert

Re: carburetor recommendation - 12/06/10 12:55 AM

Quote:

I would like maintain a hint of mileage at least.

A small eddy maybe a 1406 (600) but make sure w it that the choke is right, the tension and esp that the "pulloff" opens it a small correct amt when it starts. If you have a spreadbore I'd have Demonsizzler prep you a thermoquad. I had one on a C boat 440 & it ran good and pulled hard considering. EDIT meant to say had a PO installed 600 on the C body
Posted By: johnedod

Re: carburetor recommendation - 12/06/10 01:09 AM

I've got a thermoquad on my 440 and really like it. I got 16 mpg on a trip last summer in my road runner. Drove like grandpa though!
Posted By: Rug_Trucker

Re: carburetor recommendation - 12/06/10 04:35 PM

A good TQ core is in the BB section. 73 or 74 440 truck carb. Good price too.
Posted By: BigBlockScamp

Re: carburetor recommendation - 12/06/10 07:19 PM

Thanks. Has anyone ran a Road Demon on the street and know anything about mileage? And by the way, I consider "good mileage" to be in the double digits (I set my goals low).
Posted By: joedust451

Re: carburetor recommendation - 12/06/10 09:30 PM

Your best bet would be a spreadbore style carb, The TQs are good on gas but they can be finicky if not set up right, another carb that will do well is the Holley 6210 650dp spreadbore, it will be easier on gas then a squarebore, but it'll have that kick in the ass feeling when you get on it & open the larger secondaries, i had one on a mild 340 back in the 80s & it was a tire fryin mother.
Posted By: 1fastcuda

Re: carburetor recommendation - 03/05/11 05:17 PM

Hi

I have a barracuda 340 4 speed I have a holley 750 on it now. Also have a LD340 Intake 1 inch spacer bar. X Heads The motor is very slugggish at take off. I do not race car just for street. Can anyone tell me if this carb is to big not sure. Running 3/8 fuel line. Also its a manual choke which i disabled the choke. dont need it. The car runs great at faster speed Its hard to even smoke the tires. Have a pretronics in my points Dist. Starts right up have about 10inches vaccumm. 35 total timing. Cant figure it out any thought's Thanks Kevin
Posted By: RapidRobert

Re: carburetor recommendation - 03/05/11 08:21 PM

Quote:

any thought's

What cam/initial/springs/gears/exhaust/ACTUAL cr/cranking compression
Posted By: Anonymous

Re: carburetor recommendation - 03/05/11 09:05 PM

Call AED a sponsor on here and ask for John Dickey--mention you are a Moparts member and see what he says--they are one of the best carb shops if not THE best in the country --they will take good care of you
Posted By: Dean_Kuzluzski

Re: carburetor recommendation - 03/05/11 09:14 PM

Quote:

Hi

I have a barracuda 340 4 speed I have a holley 750 on it now. Also have a LD340 Intake 1 inch spacer bar. X Heads The motor is very slugggish at take off. I do not race car just for street. Can anyone tell me if this carb is to big not sure. Running 3/8 fuel line. Also its a manual choke which i disabled the choke. dont need it. The car runs great at faster speed Its hard to even smoke the tires. Have a pretronics in my points Dist. Starts right up have about 10inches vaccumm. 35 total timing. Cant figure it out any thought's Thanks Kevin



What gear? Initial timing? Cam? LSA? Compression?

All those things left out affect as a whole. Especially, a short stroke smallblock with a biggish carb. A 650 would help driveability. BUT, I would try dialing in more initial mech. advance and some carb tuning. Are the idle mixture screws responsive when adjusted??
Posted By: 1fastcuda

Re: carburetor recommendation - 03/05/11 10:42 PM

Hi

Running a 28/484 108 centerline 50% I have a 3.55 Gears 17 in Tires

Purple cam. Have 2 1/2 dual back to cutouts Have the cherry bombs square ones.

Compression cranking is 140-150

Thanks Kevin
Posted By: 1fastcuda

Re: carburetor recommendation - 03/06/11 03:01 AM

Hi

Mixture screws seem sluggish

can turn them all the way in runs but not very good. It should stall

out but does run. I had the carb rebuilt a year ago Cant drive it now

live in north East. Thanks Kevin
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