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Re: Trouble with Edelbrock
[Re: moparjo68]
#1260317
07/02/12 09:36 AM
07/02/12 09:36 AM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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Quote:
Anyone??????????
sounds like it is perking the gas and vapor locking when hot.
when you drive it 30 mins. does the carb get hot to the touch?
when it sits over night it can and will drain back to the tank sucking most of the gas from the fuel bowl. (they are know to crack and leak also) the exessive cranking is the fuel pump primeing and filling the fuel bowl back up,then she fires and runs great till it gets hot.
when you shut it down hot it will perk the gas out of the carb and flood it,then you have to hold the throttle open for it to fire and clear the cyls.
does it have an alum intake?
does it have some kind of heat dissapator under the carb?
does it have the heat cross over blocked?
some cures would be to...
check float level.
check fuel pressure.
check air/fuel ratio with a vac gauge and set curb idle and timeing.
add a carb spacer (eddiebroke suggest the 3/8" fiber base gasket they sell.)
block heat cross over on intake if it is alum or cast iron,let the electic choke do its job.
and what everyone else said too.
almost all of the eddie carbs I have used had this problem till I fixed it with these mods to keep it cool.
I found that the 4-hole stacked heat dissaptor works the best with the eddie carbs. i use 2-1/2" kits for a 1" 4-hole carb base spacer.
it is thin alum plates stacked with gaskets inbetween the alum plates. works awsome and adds a little low end torque with the 1" 4-hole spacer.
i drive 50 miles and cant touch the intake more than 2 sec but the carb stays luke warm 
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Re: Trouble with Edelbrock
[Re: RSNOMO]
#1260321
07/02/12 04:47 PM
07/02/12 04:47 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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Quote:
Bull-shi-ite...
Who's your 'research' source???
I've got a 'crap' 750 on a 1/2 inch spacer over an aluminum M-1...
Been on there a lot of years...
And in some EXTREME heat...
No issues...
it has been said that early 750 carbs had casting flaws that made them a POS,supposed to have fixed it a few yrs later... I think this is why you have ya and nay sayers on the 750 carbs.
I know good ones are out there,I have seen them,I just never got a good one.
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Re: Trouble with Edelbrock
[Re: moparjo68]
#1260322
07/03/12 12:13 AM
07/03/12 12:13 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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Drive the car. Get it hot enough to cause the hard start problem then let it sit. Once it's had a good heat soak, pull the air cleaner. Do not try to start it. Look down the throat of the carb and pump the throttle. If you see a strong stream of fuel coming out of the accelerator pump then you do not have a problem with the fuel leaving the carb.
If it's a weak stream or won't squirt the same strength 3 or 4 times then you do have a problem with fuel boiling out of the carb.
I don't know how someone can suck fuel from the carb back into the tank. The inlet is at the top of the carb. If there's enough draw to pull fuel across the air in the top of the bowls and into the fuel line, it would have enough suction to cram the needles into the seats. That would cork the hole and prevent any fuel drain back. You also run into the fact that the bowls are vented to the atmosphere and the fuel line "suction" would draw air through the vents and never pull fuel from the bowls.
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: Trouble with Edelbrock
[Re: moparcyco]
#1260324
07/04/12 08:30 PM
07/04/12 08:30 PM
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Joined: Jan 2003
Posts: 5,270
Missouri
MY340
master
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master
Joined: Jan 2003
Posts: 5,270
Missouri
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750cfm 1407 Eddie on my Duster 360 started and ran great but it wasn't great on fuel economy but made very good power on my midly built 360. I used a 1" 4 hole spacer and a manual choke for cooler weather starts. Hot weather starts were never a problem and I used 93 octane premium gas with 10% ethanol.
1970 FE5 Duster 360/904/3.91's SOLD
1973 TB3 SpaceDuster 340/4spd/4.10's SOLD
Moparless for now but when the opportunity is right I'll have another one.
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Re: Trouble with Edelbrock
[Re: MY340]
#1260325
07/04/12 09:43 PM
07/04/12 09:43 PM
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Joined: Jul 2003
Posts: 3,378
Rancho Cordova, CA
Exit1965
master
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master
Joined: Jul 2003
Posts: 3,378
Rancho Cordova, CA
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I have seen this issue more and more lately, more than ever. Or it could be since it's affecting me that I'm noticing it more. The new gas blends seem to be causing many problems.
On my car I have the seethrough plastic filter before the carb, and as I let my car idle I could see hot bubbling fuel in the filter, and the carb was not getting enough fuels to keep the right levels and it died.
I'm currently installing a Carter electric pump to see if that solves it. As far as what I've read, carter recommends a filter BEFORE the pump. And I would run one after it also, which I'm planning to do with the seethrough filter before the carb.
If I were you I'd put a filter before the carb, seethrough plastic, and look at it when it's running hot/crappy vs. when it's relatively cool and running fine. That will tell you a lot.
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Re: Trouble with Edelbrock
[Re: Challenger 1]
#1260326
07/05/12 02:52 PM
07/05/12 02:52 PM
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Joined: Jul 2010
Posts: 64
Iowa
GreenBird
member
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member
Joined: Jul 2010
Posts: 64
Iowa
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Quote:
Quote:
Lastly I do have to admit that both my cars use mechanical pumps with hemi vapor separators with return line through the sending unit. I have burned alot of pump gas all over the country in real hi temps and real high altitudes and have never been let down.
Installing a return line from the filter/vapor separator back to the sending unit has worked for me to avoid heat soak. My friend, who is an expert, told me it was unnecessary. I did it anyway because I had heat soak problems with my 383 engine and I figured it would be worse as I was upgrading to a RB motor stroked out to 500. With this and a 1/2 carb spacer, my Edelbrock 800 cfm AVS(1813) has worked great right out of the box. I have been using Iowa 10 percent ethanol in really hot temperatures but the engine catches immediately. I used a $6 or $7 Wix filter as the vapor separator instead of the repro ones that apparently don't work too great. Installing the return line was easy -- if you are using the existing gas tank and related components, the most complicated requirement would be to install a sending unit that accepts the return line.
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