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#1 |
All around good guy
Join Date: May 2009
Location: Pendleton Oregon
Posts: 131
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Edelbrock 1406 Chevrolet 350
I installed a 1406 on my stock 350 recently. Now that I have moved to a warmer climate I'm getting some carb boil.
I currently have an aluminum adapter from the stock 350 to the 1406. So my question is, do they make a Phenolic adapter/Spacer to replace the aluminum spacer? Or do I have to go Engine > Aluminum Adapter > Phenolic Spacer > Carb? I looked and couldn't find any finite answers. Bull |
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#2 |
Registered User
![]() Join Date: Jul 2010
Location: memphis
Posts: 2,537
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Re: Edelbrock 1406 Chevrolet 350
yea..but hold on to ya socks
![]() I'm sure so others will have a line on why you having carb boil...
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1981 C-10 (Pop's) 1978 Camaro 2006 Lacrosse |
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#3 |
All around good guy
Join Date: May 2009
Location: Pendleton Oregon
Posts: 131
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Re: Edelbrock 1406 Chevrolet 350
Ahh yes! I saw that, but the "Quadrajet" confused me, but after looking at it I think that is exactly what I need.
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#4 |
All around good guy
Join Date: May 2009
Location: Pendleton Oregon
Posts: 131
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Re: Edelbrock 1406 Chevrolet 350
Upon further review it looks like that adapter is for a Quadrajet to Holley 4150
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#5 |
Registered User
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Location: Chattanooga TN
Posts: 6,208
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Re: Edelbrock 1406 Chevrolet 350
I have a 1406 too .. same problem. I have been reading about how the Edelbrocks don't like a lot of fuel pressure. Does yours have a regulator on it? I'm thinking about putting one on mine. they suggested 4-6pounds max.
Drive it for a while, get it hot then it sites for maybe 45 min and it's hard to start? .. that's what mine is doing.
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Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 *Currently underway* 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet *Sold* 1985 Silverado Short Fleet *Sold* 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride) |
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#6 |
All around good guy
Join Date: May 2009
Location: Pendleton Oregon
Posts: 131
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Re: Edelbrock 1406 Chevrolet 350
Mine is definitely boiling gas from the carb getting too hot.. The cast iron intake with the aluminum adapter transfer the heat to the carburetor.
I want to put a Phenolic Spacer as heat sink to help with heat dissipation. I tested my pressure and I'm sitting at 4.5 PSI. |
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#7 |
Senior Member
Join Date: Jan 2005
Location: Ontario, Kali
Posts: 2,427
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Re: Edelbrock 1406 Chevrolet 350
Wow, I live in Southern Caliornia and never "had carb boil" even on 110 deg days. I'm also running a 190 deg thermostat.
So maybe it's a fuel pressure problem like CC69Rat says, I run a cheap O'Reilly's fuel pump.
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#8 |
All around good guy
Join Date: May 2009
Location: Pendleton Oregon
Posts: 131
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Re: Edelbrock 1406 Chevrolet 350
I can hear and see gas vapor coming out of the the carb after I have driven at temperature. So it is definitely boiling.
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#9 |
Registered User
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Location: Chattanooga TN
Posts: 6,208
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Re: Edelbrock 1406 Chevrolet 350
![]() (just kidding .. ) I had the carb off mine not too long ago. We were installing the intake. the gas line was just loose the line was poking up beside the alternator) To get the balancer on TDC, I hopped in the truck and bumped the starter while my dad watched the line on the balancer. When the pump hit, gas shot all the way to the firewall. .. yeah.. From what I understand, the Edelbrock carbs don't like the pressure. It will actually push the needles (?) off the seats and let gas drip down into the intake causing it to flood on hot starts. It may be that gas is passing by the seats in yours, allowing it to go somewhere it's not supposed to be (I'm a carb rookie) I'm going to try a regulator on mine and if it doesn't stop it will be looking for a new home.
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Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 *Currently underway* 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet *Sold* 1985 Silverado Short Fleet *Sold* 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride) |
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#10 |
Registered User
Join Date: Mar 2010
Location: Pueblo West, CO
Posts: 944
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Re: Edelbrock 1406 Chevrolet 350
I had the hard start issue and I used a phenolic 4 hole, 1 inch spacer. Solved the problem and cost less than 20 bucks.
http://www.ebay.com/itm/CARBURETOR-S...208c69&vxp=mtr
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67 C10 Stepside 66 Mustang Coupe 99 Burb 2500 |
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#11 |
Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
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Re: Edelbrock 1406 Chevrolet 350
The phenolic spacers makes a serious difference on the Edelbrock carbs. Use the thicker ones, they work best.
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Frank |
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#12 |
Registered User
Join Date: Oct 2009
Location: canton ga
Posts: 12,728
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Re: Edelbrock 1406 Chevrolet 350
On my 72 Malibu we had the same boiling problem and went with the same spacer 67slider used.It cured the problem ,mine was donated by a friend so Im not sure about cost.
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#13 |
Cruzin
Join Date: Dec 2009
Location: on the road
Posts: 2,835
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Re: Edelbrock 1406 Chevrolet 350
i have the same problem on one of mine i have the stock intake with the exaust crossover in it, i gonna try a new spacer or just put a good ol Q-jet on it.
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Lime Wife's 67https://www.google.com/url?sa=t&rct=...wZEMODaS2d94u8 Back to the Fifties 59 https://www.google.com/url?sa=t&rct=...NAeStpydfrcj_U Proverbs 3:5,6 "Thanks to the Interstate Highway System, it is now possible to travel across the country from coast to coast without seeing anything."Charles Kuralt In memory of our first baby daughter, daddy and mommy love you. Danica Grace 6/26/14
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#14 |
Registered User
Join Date: Aug 2006
Location: Georgia
Posts: 850
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Re: Edelbrock 1406 Chevrolet 350
I had the exact same problem with mine so I bought this spacer. Fixed the problem.
http://www.summitracing.com/parts/EDL-8711/ Looks like it's the same one 67Slider posted.
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#15 |
Registered User
Join Date: Oct 2009
Location: Sacramento, CA
Posts: 161
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Re: Edelbrock 1406 Chevrolet 350
Same problem on mine. I purchased an Edelbrock fuel pump and a phenolic spacer. That did the trick!
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1972 Chevy C-10 ~ 188,000 miles give or take |
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#16 |
I dun gradjiated collij!!!
Join Date: Jan 2006
Location: St. Helens Oregon
Posts: 1,751
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Re: Edelbrock 1406 Chevrolet 350
Edelbrocks hate heat, excessive fuel pressure and poorly adjusted floats. I run 3 of them: a 1405, 1406, and 1806 AVS and all of them need work out of the box. BUT once everything is dialed in they are excellent low maintenance carbs. I've pulled them from the box brand new with floats out of whack from being used as a football during shipping. That caused some issues til I popped the top and dialed everything in.
As far as the OP's issue, The cast iron manifold with heat crossovers is killing you, and the Qjet adapter, phenolic spacer, carb solution is a bandaid. In my opinion, used aluminum SBC intakes are abundant and cheap, plug your crossovers with the Felpro inserts, slap on a used aluminum intake and see if that cures the issue.... If not a small phenolic spacer or thick gasket may be needed.
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Built NOT Bought. Viper Red 1971 LWB C10 355 Vortec W/700R4 4/5 drop AKA Screamin' You are missed!
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#17 | |
Senior Member
Join Date: Jan 2005
Location: Ontario, Kali
Posts: 2,427
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Re: Edelbrock 1406 Chevrolet 350
Quote:
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#18 |
Registered User
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
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Re: Edelbrock 1406 Chevrolet 350
Crap. I wish I had the Edelbrock part number I used. Years ago when I was putting my 383 together I got help from this board and was told to get a spacer. I used an Edelbrock part and NEVER have had an issue with my 1406 carb. It sits on a 2101 aluminum Edelbrock intake.
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'70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN |
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#19 |
Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
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Re: Edelbrock 1406 Chevrolet 350
I used the 1", 4 hole phenolic spacer on my trucks. It isolated the heat and the 4 holes kept the velocity of the air charge to the intake up where it should be.
1" 4-hole Spacer, Black Phenolic Plastic 8711*
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Frank |
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#20 |
All around good guy
Join Date: May 2009
Location: Pendleton Oregon
Posts: 131
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Re: Edelbrock 1406 Chevrolet 350
Ahh great advice. Going to get this sorted out next week. Will update
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#21 |
All around good guy
Join Date: May 2009
Location: Pendleton Oregon
Posts: 131
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Re: Edelbrock 1406 Chevrolet 350
So finally got this sorted out.. The new OEM fuel pump was putting out 8.5 PSI. I added a fuel regulator and set it to 4.5 and all is well.
I also measured the temp of the carb base and it wasn't getting hot at all. |
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#22 |
Senior Member
Join Date: Jan 2005
Location: Ontario, Kali
Posts: 2,427
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Re: Edelbrock 1406 Chevrolet 350
Glad you addressed the real problem! Fuel pressure issues will do you in every time.
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#23 |
Registered User
Join Date: May 2012
Location: Raleigh, NC
Posts: 639
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Re: Edelbrock 1406 Chevrolet 350
Suggestions? Im getting 9psi with a 1406 carb.
What fuel pressure regulator did you install and where? I was thinking about something like this, but don't know where I'd mount it.. http://www.summitracing.com/parts/SUM-G3032/?rtype=10 Either that, or would it be better to just buy an Edelbrock 1721 fuel pump that puts out 6psi and skip the regulator all together?
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#24 |
Registered User
Join Date: May 2012
Location: Raleigh, NC
Posts: 639
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Re: Edelbrock 1406 Chevrolet 350
anyone?
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#25 | ||
"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,941
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Re: Edelbrock 1406 Chevrolet 350
Most of the Edelbrock carbs like 4.5 to 5.5 PSI.
Mount a regulator anywhere between the pump and the carb. Might have to do some fabricating. There are also mounts available that mount it up close to the carb. Gary
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