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Re: Are Edelbrock carbs known to boil fuel in the bowl?
[Re: mopar346]
#1903070
08/31/15 12:11 PM
08/31/15 12:11 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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I'll run it out of gas if need be, but I'll run an auxillary source for the test if it is that bad. One thing is I drive these things a lot and running 100 octane all the time would get to even me. I can get 87 octane non-ethanol about 3 miles from the house but not sure it would like a lot of that. I've never nothered with octane booster is it effective? Is there an additive that counteracts the ethanols tendency to boil out there?
Thanks for all the input so far guys and I'll update as I figure stuff out.
Sunoco 100 octane unleaded is loaded with ethanol, loaded, more than 10%, that's how they get the octane so high. If you do this then get 110 leaded, it's the only fuel worth using for test like this. Sunoco 260GTX 98 octane is the only unleaded gas with no ethanol. Well now they have optima that is 95 octane with no ethanol. When I was in Fla I saw non ethanol gas in many places for boats. I would suggest to block off the heat risers and maybe consider a different intake manifold with no heat riser passages.
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Re: Are Edelbrock carbs known to boil fuel in the bowl?
[Re: bee1971]
#1903083
08/31/15 12:41 PM
08/31/15 12:41 PM
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Joined: Jul 2003
Posts: 12,129
Cleveland
sunroofgtx
I Live Here
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I Live Here
Joined: Jul 2003
Posts: 12,129
Cleveland
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Exact problem I am having. Over the winter, I plan on fixing it using this.. I have a rubber Superformance gasket, along with a hi-tech spacer I got from a vender at Carlisle. Exact problem on my 650 Thunder Series carb.
Join the quickest team in motorsports. Team FireCore. CustomWiresets.com
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Re: Are Edelbrock carbs known to boil fuel in the bowl?
[Re: sunroofgtx]
#1903092
08/31/15 01:01 PM
08/31/15 01:01 PM
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Joined: Mar 2003
Posts: 9,099
Rogue River, OR
Jeremiah
master
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master
Joined: Mar 2003
Posts: 9,099
Rogue River, OR
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I run a heat riser cross-over, stock choke, and pump gas so my problems with percolation seemed unending. All summer long, every time I parked for more than ten minutes. Very irritating indeed! I tried several things but hood clearance, appearance (sorry but I hate those stacked gaskets), and of course longevity. We drive this car year round in Oregon so maintenance wise it gets treated like any other passenger car. http://www.summitracing.com/parts/edl-8725/overview/Paint it black! As said above the best way to avoid this issue is: a) Mix in some 110 with the pump swill. b) Block off the heat-riser cross over. c) Fuel injection I just mix in a few gallons of 110 during the extremely hot months and that gets us by.
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Re: Are Edelbrock carbs known to boil fuel in the bowl?
[Re: Jeremiah]
#1903153
08/31/15 02:44 PM
08/31/15 02:44 PM
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Joined: Jan 2003
Posts: 15,291
Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,291
Omaha Ne
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We have encountered the issue on several customers cars. Step 1. install a phenolic spacer. The Aluminum ones will transfer more heat. Step 2. if #1 doesn't work, ,make sure the fuel line is not routed low, close to the heat crossover. Step3. Only have had to do this once, fabricate an 1/8" aluminum plate to block the radiant heat off the crossover passage from the fuel line. Step 4. Set up a return line with a restricted orifice to get the fuel moving instead of sitting in the line above the crossover cooking.. haven't had to resort to this yet block off the crossover. Step 1 and 2 have cured most of the problem vehicles. 
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Re: Are Edelbrock carbs known to boil fuel in the bowl?
[Re: mopar346]
#1903201
08/31/15 03:40 PM
08/31/15 03:40 PM
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Joined: Jan 2003
Posts: 74,970
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,970
U.S.S.A.
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Yes the fuel is going to percolate in a Carter style carb.
Is your crossover still open, block it, switch to an Alum intake AND the Holley carb , though an 850 is a little big unless you are running an 800 ebrock , I hope you don't have the POS performer 750 , if so drop in it the bottom of the everglades.
My friend has a 383 I did for him last year , runs what I outline above with the cheapest , crappiest, gas he can afford and no issues.
running up my post count some more .
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Re: Are Edelbrock carbs known to boil fuel in the bowl?
[Re: mopar346]
#1903409
08/31/15 08:03 PM
08/31/15 08:03 PM
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Joined: Jan 2003
Posts: 28,067
Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,067
Irving, TX
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I don't have heat related fuel problems with my 72 Imperial in Texas. The car was 100% stock with the exception of an AVS. I put a 1/4" rubber spacer under the carb. The heat riser and crossover are still in place. If I let the car sit for several days in the summer I will need to run the electric pump for a moment to refill the bowls. Other than that, it fires right up. I use one of these cheesy little pumps:  My car is from California and was not equipped with a mechanical pump due to smog pump interference.
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: Are Edelbrock carbs known to boil fuel in the bowl?
[Re: JohnRR]
#1903440
08/31/15 08:42 PM
08/31/15 08:42 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Yes the fuel is going to percolate in a Carter style carb.
Is your crossover still open, block it, switch to an Alum intake AND the Holley carb , though an 850 is a little big unless you are running an 800 ebrock , I hope you don't have the POS performer 750 , if so drop in it the bottom of the everglades.
My friend has a 383 I did for him last year , runs what I outline above with the cheapest , crappiest, gas he can afford and no issues.  for the most part except my 600 eddie carb sits right on my victorjr 340 intake with only a gasket and has never boiled the fuel, even E10 I buy out of town. But the reason I think is the intake nor the eddie heads have heat risers so my carb has run fine in super hi heat in Vegas and Reno at over 110° with no problems. Even re starts are normal and no struggle in hi heat. Block those heat risers in the heads and use a aluminum intake with no heat risers=electric or manual choke. Man those eddie heads are nice because of that feature alone IMO.
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Re: Are Edelbrock carbs known to boil fuel in the bowl?
[Re: mopar346]
#1903548
08/31/15 11:25 PM
08/31/15 11:25 PM
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Joined: Jul 2007
Posts: 11,836
Florida
mopar346
OP
Let me tell ya about fat chicks!
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OP
Let me tell ya about fat chicks!
Joined: Jul 2007
Posts: 11,836
Florida
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Well, the behavior seemed to deteriate greatly today, I am gonna pull a fuel sample tomorrow just to make sure I haven't added to the issue with contaminated fuel. I was gonna buy one of the coolcarb heatsheilds at E-town but of course there was no vendor there. I need to just order one and be patient, not my strong suite. The carb is a 750, not sure if it is the performer series or not I haven't paid it much attention since I hate Edelbrocks and think they are junk from the word go. I built the 850 for it today but as many of you know the linkage and fuel line wont clear a stock intake so that was a bust. I really wonted to stay with the stock appearance so a 4 barrell aluminum intake isn't in my thinking. HOWEVER, I think I am gonna build the carbs for my 6 pack tomorrow and start thinking about installing it. A friend has a 6 pack on his 68 RT with a regular air grabber type air cleaner and it fits under the bulge hood fine, I need to call him and confirm it before I go to far but I have seen the car and think I knwo the cleaner used. I need to get the Edelbrock off of it if for no other reason my piece of mind, anything that goes one with the running will be blamed on it.
Thanks for all the input guys.
Careful, your character's showing!
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Re: Are Edelbrock carbs known to boil fuel in the bowl?
[Re: mopar346]
#1903568
08/31/15 11:47 PM
08/31/15 11:47 PM
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Joined: Apr 2012
Posts: 18,880
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RSNOMO
Moparts Torchbearer
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Moparts Torchbearer
Joined: Apr 2012
Posts: 18,880
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I hate Edelbrocks and think they are junk from the word go. That's a shame... 'Cuz there's a whole lot of 'em in these parts... And they're doing just fine... Don't see the value in Carter??? Come here in Sept, and watch 'em run in Pure Stock... They are formidable...
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Re: Are Edelbrock carbs known to boil fuel in the bowl?
[Re: mopar346]
#1903577
08/31/15 11:57 PM
08/31/15 11:57 PM
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Joined: Jul 2007
Posts: 11,836
Florida
mopar346
OP
Let me tell ya about fat chicks!
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OP
Let me tell ya about fat chicks!
Joined: Jul 2007
Posts: 11,836
Florida
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I know some people have success with them but other than the one on the CJ every one I have ever had anything to do with has not performed well, this one was OK but the heat has undoubtly taken it's toll. Even before it started acting up so poorly the car seemed like it would run out of carb when hammering it. I'm glad you have had luck with them but I haven't.
Careful, your character's showing!
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Re: Are Edelbrock carbs known to boil fuel in the bowl?
[Re: mopar346]
#1903596
09/01/15 12:26 AM
09/01/15 12:26 AM
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Joined: Jul 2007
Posts: 11,836
Florida
mopar346
OP
Let me tell ya about fat chicks!
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OP
Let me tell ya about fat chicks!
Joined: Jul 2007
Posts: 11,836
Florida
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I'm the other way, I seem to always be able to make a Holley work and cant make heads or tails of an Edelbrock, of course I haven't bothered to learn since I can make a Holley work and frankly have so many of them sitting around. Holleys are very tuneable so I like that about them, important to make sure you have a good carb to start with, make sure the shafts aren't leaking and all the ports are clear. I really wish a Holley would just bolt up to the intake so I didn't have to change it over, if I'm changing intakes it's gonna be for the one I already have.
Careful, your character's showing!
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Re: Are Edelbrock carbs known to boil fuel in the bowl?
[Re: mopar346]
#1903624
09/01/15 01:11 AM
09/01/15 01:11 AM
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Joined: Feb 2003
Posts: 2,810
Sobieski Wi
bee1971
master
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master
Joined: Feb 2003
Posts: 2,810
Sobieski Wi
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If you would of mentioned Edelbrock 750 from post #1 , four things would of happened
1) 25% of us would of said , don't even waste your time on fuel percolating , you have bigger issues , like finding the nearest garbage can
2) 25% of us would of said , don't even waste your time on fuel percolating , you have to change the jetting , metering rods , springs , check your float levels , drill this that and everything will be ok . Then back to the original topic
3) 25% of us would of said , put a Holley on it
4) 25% of us would of said , what's been discussed so far
I like the Edelbrock 600 / 800 Performer Carbs
Also the Thunder Series AVS Carbs
And the Factory Carter AVS Carbs 750 cfm found on the 440 HP Motors
Last edited by bee1971; 09/01/15 01:14 AM.
1971 Dodge Charger Superbee
2011 Ram Sport 1500 Quad Cab Deep Water Blue Loaded
Siberian Huskies
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Re: Are Edelbrock carbs known to boil fuel in the bowl?
[Re: mopar346]
#1903670
09/01/15 02:40 AM
09/01/15 02:40 AM
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Joined: Jan 2003
Posts: 74,970
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,970
U.S.S.A.
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Well, the behavior seemed to deteriate greatly today, I am gonna pull a fuel sample tomorrow just to make sure I haven't added to the issue with contaminated fuel. I was gonna buy one of the coolcarb heatsheilds at E-town but of course there was no vendor there. I need to just order one and be patient, not my strong suite. The carb is a 750, not sure if it is the performer series or not I haven't paid it much attention since I hate Edelbrocks and think they are junk from the word go. I built the 850 for it today but as many of you know the linkage and fuel line wont clear a stock intake so that was a bust. I really wonted to stay with the stock appearance so a 4 barrell aluminum intake isn't in my thinking. HOWEVER, I think I am gonna build the carbs for my 6 pack tomorrow and start thinking about installing it. A friend has a 6 pack on his 68 RT with a regular air grabber type air cleaner and it fits under the bulge hood fine, I need to call him and confirm it before I go to far but I have seen the car and think I knwo the cleaner used. I need to get the Edelbrock off of it if for no other reason my piece of mind, anything that goes one with the running will be blamed on it.
Thanks for all the input guys. If it's a 750 then it's a Performer .. they didn't make a thunder series 750 ... JUNK ... It's not hard to get an alum intake to look stock , think CH4B , otherwise if you must have a boat anchor for an intake find a 70 440 intake , it's made to clear a holley.
running up my post count some more .
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Re: Are Edelbrock carbs known to boil fuel in the bowl?
[Re: mopar346]
#1903744
09/01/15 09:35 AM
09/01/15 09:35 AM
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Joined: Jul 2007
Posts: 11,836
Florida
mopar346
OP
Let me tell ya about fat chicks!
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OP
Let me tell ya about fat chicks!
Joined: Jul 2007
Posts: 11,836
Florida
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Well, I guess that confirms it, my hatred for Edelbrocks is founded. I will waste no more time on it and proceed with a Holley one way or 3.  Can anyone confirm that the 6 pack with a basic factory air cleaner will fit under the bulge hood? It's a repop set up. Thanks folks
Careful, your character's showing!
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