Is my 440 over carbureted? Summit says so..
#1156565
01/13/12 10:29 PM
01/13/12 10:29 PM
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Joined: Oct 2003
Posts: 984 Colorado
dssaa
OP
super stock
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OP
super stock
Joined: Oct 2003
Posts: 984
Colorado
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I have a 69 Coronet with a 440. It was a 78 low compression block that I built, mild cam, stock intake, headers...nothing to brag about, but a solid driver. I have a rebuilt Edelbrock 750 on it, and it gets terrible gas mileage,less than 10. Its also a dog, I hate to say, takes forever to build power, but once it does, its quick. Should I dial down to about a 600 cfm carb? Was going to upgrade to a aluminum intake from Summit, and ran their carb calculator. Whats everyone runnin? Dave
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Re: Is my 440 over carbureted? Summit says so..
[Re: dssaa]
#1156566
01/13/12 10:37 PM
01/13/12 10:37 PM
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Joined: Jan 2006
Posts: 587 IL . usa
cjs69mope
mopar
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mopar
Joined: Jan 2006
Posts: 587
IL . usa
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I would go to Holley 600 if it were me.
1969 Dodge Charger
1969 Dodge Superbee
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Re: Is my 440 over carbureted? Summit says so..
[Re: cjs69mope]
#1156567
01/13/12 10:41 PM
01/13/12 10:41 PM
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Joined: Jun 2006
Posts: 5,167 CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,167
CT
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Put on any carb but the Eddy 750, it has a reputation for being an un-tunable and poor performer. I'd stick with a 750, a 600 is a bit on the small side for anything other than a stock 440 with a towing cam but to each their own. You will be happy with anything that is not the carb you have now!
Now I need to pin those needles, got to feel that heat Hear my motor screamin while I'm tearin up the street
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Re: Is my 440 over carbureted? Summit says so..
[Re: dssaa]
#1156570
01/13/12 11:39 PM
01/13/12 11:39 PM
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Joined: Aug 2003
Posts: 43,317 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,317
Bend,OR USA
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Quote:
I have a 69 Coronet with a 440. It was a 78 low compression block that I built, mild cam, stock intake, headers I have a rebuilt Edelbrock 750 on it, and it gets terrible gas mileage,less than 10. Its also a dog, I hate to say, takes forever to build power, but once it does, its quick.Dave
Two things, did you degree the cam in or did you align the dots and let ir rip? Also what do the spark plugs look like after normal driving? Rebuilt low compressio 1978 motor and rebuilt 750 Eddy carbs, two things that may not be working very well together I have never ran a low compression late model motor like that in any thing other than a class A motor home so I don't know what they like or what they feel like in a noraml size car your Coronet My point is all the street and street and strip and race only 440 motors that I have tuned on like big carbs, the bigger the better I have had problems in motors that where caused by the cam being ground wrong, once the cam timing was corrected everything got better ![](/ubbthreads/images/graemlins/scope.gif)
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Is my 440 over carbureted? Summit says so..
[Re: dssaa]
#1156578
01/14/12 01:37 AM
01/14/12 01:37 AM
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Joined: Aug 2003
Posts: 12,291 Kent, Wa
340SHORTY
Truck Nut
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Truck Nut
Joined: Aug 2003
Posts: 12,291
Kent, Wa
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Holley 3310 in my book. even ran my 340 on 1 till I got the 6 pack..
I am truckless..
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Re: Is my 440 over carbureted? Summit says so..
[Re: dssaa]
#1156582
01/14/12 06:17 AM
01/14/12 06:17 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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what cranking compression/gears/converter/timing/exhaust?
live every 24 hour block of time like it's your last day on earth
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Re: Is my 440 over carbureted? Summit says so..
[Re: dssaa]
#1156583
01/14/12 07:30 AM
01/14/12 07:30 AM
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Joined: Dec 2007
Posts: 18,160 Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,160
Mass
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Before you start flushing more money down the toilet, if you don't possess the equipment and or skill to assess the engines configuration regarding compression, cam position/phase/timing along with ignition timing/curve and carb calibration, and running characteristics along with whatever driveline configuration you have,....spend the money and take the car to a shop that can determine a problem, if it exists
because if it's an improper cam phasing, or poor torque converter selection, improper timing, etc, etc, the list can be endless as to why the performance is poor....eliminate all the "gray" areas before heaping more $$$ on parts they may do nothing to help your condition
Mike
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Re: Is my 440 over carbureted? Summit says so..
[Re: DAYCLONA]
#1156584
01/14/12 06:04 PM
01/14/12 06:04 PM
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Joined: Jan 2003
Posts: 5,912 Athens, Greece
Pyper70
master
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master
Joined: Jan 2003
Posts: 5,912
Athens, Greece
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You need a timing light...a good one...I use a Digital SnapOn. Is your distributor curved? Whats your initial and total? Do you have an Air Fuel Meter...Most people don't but thats what is going to help you dial your carb in the best way instead of guessing.
I had a 850 Holley on my 440...I removed it...I was annoyed by it...I put the Eddy 500 from my slant onto my 440 and it worked better than ever before, I immediately went and placed an order at the speed shop for The Eddy.
I went to Eddy 750 on both my 440s...Alas now just one car is in the stable but she had the 750 still. I run a mechanical dizzy so my calibration is much different than your setup.
I swapped from my 750/RPM setup to a Dual Quad CH28 w/ Dual Eddy 500s. Runs like a dream. Took about two weekends to crunch the numbers from the Air/Fuel meter and figure out what direction on the power/economy chart in the Edelbrock manual shows you. Never had to remove the carb, swapped out the jets to two sizes larger on the primary carb....secondary carb stayed the same. Metering rods had to get swapped out as well as adjusting the front power linkage (both of mine are set in the middle slot)
There are people on this board who are dead set against Eddy's....You have to find out where you wanna go and what you wanna do with the car. I like driveability..getting in the seat after 3 weeks and the engine turning over in less than 5 seconds. Stay with the Eddy...if you like racing and putting your foot down...go for the Holley...if you have money to burn and wanna go full out racing...buy a BG or a Demon.
Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
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