Edelbrock Carbs
#1682510
10/05/14 11:06 PM
10/05/14 11:06 PM
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Joined: May 2005
Posts: 127 Missoula, Montana
ChadP
OP
member
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OP
member
Joined: May 2005
Posts: 127
Missoula, Montana
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Engine - 440, mild build, 10.0 to 1. Carb is an Edelbrock 750, and I'm done with it. Been a pain since day 1. After buying it, I read on the forums where many others have had similar problems with 750. I realize there are Holley lovers who will criticize this direction - but thinking of replacing the 750 with Edelbrock 600. Car is a 4-speed 65 B-Body with 3.09 first gear in 833 trans, and 2.76 rear. (Was auto car but converted). Good cruiser, and with the 3.09 first gear, OK getting started. With a Holley 700 dp engine did 385 hp on dyno when new. Has about 5k miles on it. The question - for a car that's used primarily cruising on the highway, will the 600 be enough carb?
'65 Coronet 500
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Re: Edelbrock Carbs
[Re: ChadP]
#1682511
10/05/14 11:15 PM
10/05/14 11:15 PM
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Joined: Mar 2005
Posts: 1,406 New Jersey, USA
yella71
pro stock
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pro stock
Joined: Mar 2005
Posts: 1,406
New Jersey, USA
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It will be fine but you'll lose a bunch of power
71 challenger convertable, 64 sport fury 383 ci with factory air
99 sebring convertable
89 CTD pup
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Re: Edelbrock Carbs
[Re: Rob C]
#1682513
10/06/14 12:23 AM
10/06/14 12:23 AM
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Joined: May 2005
Posts: 127 Missoula, Montana
ChadP
OP
member
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OP
member
Joined: May 2005
Posts: 127
Missoula, Montana
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Cam: Gross lift at cam - intake 317, exhaust 333. Degree of duration intake 220, exhaust 230. Running clearance...valve lift intake 475, duration 270. Exhaust lift 500, duration 285. Lobe center 110, center line 108.
Exhaust stock '69 HP manifolds. Intake manifold, stock. Heads, stock 906, no porting.
'65 Coronet 500
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Re: Edelbrock Carbs
[Re: lewtot184]
#1682522
10/06/14 09:55 PM
10/06/14 09:55 PM
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Joined: Apr 2012
Posts: 18,880 -
RSNOMO
Moparts Torchbearer
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Moparts Torchbearer
Joined: Apr 2012
Posts: 18,880
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Quote:
the real key is calibration and to re-work afb's one has to get their head out of the holley box.
Uh-huh...
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Re: Edelbrock Carbs
[Re: ChadP]
#1682523
10/07/14 11:37 AM
10/07/14 11:37 AM
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Joined: Jan 2003
Posts: 28,068 Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,068
Irving, TX
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The 750 AFB has a mixed reputation. Years ago it was found that there were some issues with the Eddy design. Simple scaling up of the 600 didn't allow for the best performance. Jetting and rod adjustments helped but didn't completely cover the problem.
Personally, I prefer the AFB. When I sold the hot rod I had dropped a 600 cfm AFB on the 440. The throttle response was indeed impressive and there wasn't much loss in power up top. It made for a great driving car. My Imperial also wears a 600 cfm AFB on it's 440. it's not exactly a performance machine but it's a lot more car than what you're pushing around.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Edelbrock Carbs
[Re: Mr.Yuck]
#1682525
10/07/14 11:52 AM
10/07/14 11:52 AM
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Joined: Jan 2003
Posts: 28,068 Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,068
Irving, TX
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The 800 Thunder is a better choice than the 750 assuming your engine can handle the flow.
Remember, we're not talking about a RACE engine or even much of a hot rod. He stated the car was a cruiser. The smaller carb will give excellent response and good performance.
As for the 750DP? I'm not a racer and have no use for those carbs. I've had my share of them and even built one around a ProForm body. It went down the road and I moved back to the AFB.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Edelbrock Carbs
[Re: Steve Bryant]
#1682528
10/07/14 01:36 PM
10/07/14 01:36 PM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
master
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master
Joined: Jun 2008
Posts: 3,916
usa
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Quote:
I took the Eddy 750 off my mild 440 about six months ago after many weeks of tuning with an A/F sensor and gauge. I moved up to the Eddy 800 1413 and it was a night-and-day difference. No low-end stumble and the A/F mixture was perfect right out of the box.
There is something about the accelerator pump and the 750 that doesn't work well with many big blocks. I was able to tune most of the stumble out but I never could get it to smooth out completely. I sold the 750 on Ebay and bought the 1413 and the car runs like a top now.
the 1407 i have has a 35 squirter which is too big for driving and the 113 primary jets are ridiculously big. i also have concern about the .046 idle air bleed in combination with a .037 idle jet. they're fixable but need some patience and a little working knowledge of carbs.
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Re: Edelbrock Carbs
[Re: DaveRS23]
#1682529
10/07/14 11:43 PM
10/07/14 11:43 PM
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Joined: Mar 2007
Posts: 3,300 Northern Indiana
Dunnuck Racing
master
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master
Joined: Mar 2007
Posts: 3,300
Northern Indiana
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Quote:
Quote:
I have a 440 on my dyno now and have tested several carburetors on it. At 440 horsepower
Has a Street Demon been part of your testing?
Yes it has, It did real well at the 440 horsepower level. When I ported the heads and went with a bigger camshaft, these smaller carburetors were too small. But on the lower horsepower build the Street Demon 625 was worth some low end torque. It wasn't quite as impressive as it was on my 360 mule though. I think it had to do with the Thumper cam in that 360 having weaker vacuum signal than this 440 with a smaller cam Keith
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