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#1 |
Registered User
Join Date: May 2018
Location: San Antonio, TX
Posts: 81
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Recommendation on Carburetor Selection
67 Chevy C20 Longhorn with 402 big block. Finally got it running after replacing fuel pump, plugs, distro cables & cap etc. Has a Carter AFB 9605S that has a leaking accelerator pump and the air fuel screws don't seam to work (no change in RPM when I attempt to adjust the air fuel mixture - as a novice).
Trying to decide: Rebuild the Carter AFB Buy a reconditioned OEM Stage 2 Quadrajet $469 Buy a reconditioned Edelbrock 600 CFM carb $499 http://www.lmctruck.com/icatalog/CB/full.aspx?page=58 Although I'm not made of $$, I value reliability highly. Thoughts? Fortgot to mention, I have the original 2 quadrajet carb but it was left outside and it looks pretty rough.
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70 Chevy C20 3/4T 8-400 Longhorn |
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#2 |
Registered User
Join Date: Jan 2010
Location: nevada
Posts: 649
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Re: Recommendation on Carburetor Selection
Not to many parts, why not rebuild it? Summit has a rebuild kit for $45, for that its worth a try. While you've got it apart give it a good cleaning. If you rebuild it, put a straight edge on the top and base plate to make sure it isn't warped. If you decide to buy one I would get the edelbrock, its basically an improved design of the carter.
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2003 Dodge 2500 1969 C10 2014 Camaro SS/RS/1LE |
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#3 |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,437
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Re: Recommendation on Carburetor Selection
I don't know what "Stage 2" means in a Q-Jet. I would talk to one of the experts in Q-Jet repair who can make you one that is calibrated for your engine. I'd recommend a Q-Jet because that's what was on your truck when new.
As far as the Carter is concerned, it's flooding or the float(s) are set too high is why fuel is coming out the accelerator piston hole. As a result, idle mixture screw adjustment will be useless.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#4 | |
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Location: 2nd left past the stump on a dirt road.
Posts: 2,629
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Re: Recommendation on Carburetor Selection
Quote:
Reconditioned Edelbrock 600 cfm for 5 Benjamins ??????? I would shy way away from that one! I purchased a new one 10 years ago for around 250 bills. Easily adjustable, going strong, on everyday 87 pump gas. |
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#5 |
Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,626
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Re: Recommendation on Carburetor Selection
He likely means the quadrajet smi has. A much better deal than an eddy. The quadrajet doesn’t need the required fuel pressure regulator or heat spacer the eddy carb does.
Here’s the smi stage 2. https://www.smicarburetor.com/produc...ID2/9/sfID3/32 |
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#6 | |
Registered User
Join Date: Jun 2003
Location: Mtn. Home, Idaho
Posts: 906
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Re: Recommendation on Carburetor Selection
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#7 |
Registered User
Join Date: Aug 2014
Location: Dallas, Texas
Posts: 54
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Re: Recommendation on Carburetor Selection
Q-jet. Get it built specifically for your setup.
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#8 |
Registered User
Join Date: Apr 2011
Location: Fairview Park, Ohio
Posts: 1,031
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Re: Recommendation on Carburetor Selection
My new eddy 600 cfm was $335 from summit last year, love it so far. With a HEi and tune up you'll be good.
And don't buy from LMCrap
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My build page http://67-72chevytrucks.com/vboard/s...d.php?t=764662 My cabinet building site http://www.cbcabinets.com |
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#9 |
Senior Member
![]() Join Date: Oct 2009
Location: Godley, TX
Posts: 17,964
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Re: Recommendation on Carburetor Selection
1 vote for Q-Jet
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#10 |
Registered User
![]() Join Date: Nov 2006
Location: KINGSPORT,TN.
Posts: 3,035
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Re: Recommendation on Carburetor Selection
Put it back stock with reman q-jet
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I BELIEVE IN JOHN 3:16 |
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#11 | |
Senior Member
![]() Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,284
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Re: Recommendation on Carburetor Selection
Quote:
I think the only "improvement" Edelbrock put on the AFB design was a big red decal. Otherwise it's unchanged -- which is a good thing. Edelbrock's tuning book and tech service is better than Carter's, which is non-existant now. Shop Jeg's and Summit for bigger ticket items. I have been running my AFB for nearly 20 years now. Cost $199 at the local hot rod parts shop retail, then.
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Every 25 years I like to rebuild that 292, whether it needs it or not. Last edited by '68OrangeSunshine; 08-19-2018 at 03:19 PM. |
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#12 |
Registered User
![]() Join Date: Aug 2016
Location: Southside, Alabama
Posts: 173
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Re: Recommendation on Carburetor Selection
I bought the summit M2008 600cfm.i haven't had a chance to run it but it has great reviews on several forums and on the summit page. It only ran me $289
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72 C10 lwb fleetside aka Big Rhonda. Still plugging away. Build thread: http://67-72chevytrucks.com/vboard/s...42#post8247142 |
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#13 |
Senior Member
![]() Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,922
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Re: Recommendation on Carburetor Selection
Definitely Quadrajet. It's the best all-around carb ever made.
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I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson |
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#14 | |
Registered User
![]() Join Date: Jul 2015
Location: 2nd left past the stump on a dirt road.
Posts: 2,629
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Re: Recommendation on Carburetor Selection
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#15 | |
Registered User
Join Date: May 2018
Location: San Antonio, TX
Posts: 81
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Re: Recommendation on Carburetor Selection
Quote:
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70 Chevy C20 3/4T 8-400 Longhorn |
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#16 |
Registered User
Join Date: May 2018
Location: San Antonio, TX
Posts: 81
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Re: Recommendation on Carburetor Selection
Based on everyone's input, I decided to go with a SMI reconditioned Stage 1 Quadrajet. Although I plan on rebuilding the engine at some point, I don't plan on doing anything special with it. I just want it to perform as originally designed.
Appreciate everyone's input!
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70 Chevy C20 3/4T 8-400 Longhorn |
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#17 |
Registered User
Join Date: May 2018
Location: San Antonio, TX
Posts: 81
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Re: Recommendation on Carburetor Selection
Installing SMI stage one 750ccm Quadrajet on my 402 big block 70 chevy c20. Anyone have pictures that show how vacuum tubes are connected?
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70 Chevy C20 3/4T 8-400 Longhorn |
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#18 |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,437
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Re: Recommendation on Carburetor Selection
I posted the connections in your other thread.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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