Carb Recommendation?
Thread Starter
Heel & Toe
Joined: Oct 2007
Posts: 19
Likes: 0
From: Odessa Florida
Carb Recommendation?
I have a 1970 350/350 essentially stock, with the exception of a Edlebrock Performer manifold.
My Quadrajet 4MV, with manual choke, likely needs a rebuild and I am considering whether to update with a newer carb (possibly the Edelbrock 600CFM performer), or to invest in the rebuild.
I basically want to have a reliable street performer when I am done, not looking to take this to the strip.
Dollar for dollar, it seems to be almost a toss up on cost.
Recommendations?
My Quadrajet 4MV, with manual choke, likely needs a rebuild and I am considering whether to update with a newer carb (possibly the Edelbrock 600CFM performer), or to invest in the rebuild.
I basically want to have a reliable street performer when I am done, not looking to take this to the strip.
Dollar for dollar, it seems to be almost a toss up on cost.
Recommendations?
Melting Slicks
Joined: Mar 2006
Posts: 3,342
Likes: 7
From: Connecticut
Rebuild the QJ or go Holley. I'll let you calculate the price difference between the rebuild and the Holley
Race Director
Joined: Jun 2000
Posts: 10,046
Likes: 675
From: FL
The Edelbrock is just a Carter AFB, designed back in the 1950's. GM used to use them as a base carb until they designed the Q-Jet which is a much better piece.
Race Director
Joined: Aug 2004
Posts: 10,628
Likes: 132
From: Duvall, WA
Le Mans Master
Joined: Sep 2003
Posts: 8,812
Likes: 2,029
From: eastern NC
Barry Grant Speed Demon 650
Check out this thread in the C3 Parts for Sale section...
http://forums.corvetteforum.com/c3-p...mon-650-a.html
It will cost about $500 from JEGS for a new one and he's only asking $300...
"Carb has break-in miles only. Just wasn't turning out right for my engine. It's the Speed Demon 650 Mechanical secondaries double pumper. Bought it less than a year ago, so it's the latest one with the Idle-Eze and all that good stuff. This one has the electric choke kit installed on it although I never hooked it up on my car."
Good luck... GUSTO
http://forums.corvetteforum.com/c3-p...mon-650-a.html
It will cost about $500 from JEGS for a new one and he's only asking $300...
"Carb has break-in miles only. Just wasn't turning out right for my engine. It's the Speed Demon 650 Mechanical secondaries double pumper. Bought it less than a year ago, so it's the latest one with the Idle-Eze and all that good stuff. This one has the electric choke kit installed on it although I never hooked it up on my car."
Good luck... GUSTO
Melting Slicks
Joined: Oct 2008
Posts: 2,154
Likes: 69
From: Regina Sk Canada
Stay away from Barry Grant carbs, they are nothing but trouble and the after sales service is terrible. I had a brand new carb for my camaro that was full of aluminum filings. i sold it an bought a holley after that. I just spent $50.00 for a carb kit and float and new filter for the QJ off my 80 vette. I rebuilt it myself, and the car runs like a champ.
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Le Mans Master
Joined: Jun 2008
Posts: 5,284
Likes: 235
From: Rockledge FL
i had the same issue a while ago. i didnt want to mail my carb off anywhere for a rebuild and then try to tune it myself and no one in san antonio would even consider touching it.
every place i called said something to the effect of "bring us the car with a holley on it and we will take care of you, we dont work on quadrajunk"
their word not mine. so i switched intakes, installed a holley and out of the box it runs pretty damn good.
every place i called said something to the effect of "bring us the car with a holley on it and we will take care of you, we dont work on quadrajunk"
their word not mine. so i switched intakes, installed a holley and out of the box it runs pretty damn good.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
The Quadrajet is a good carb: flow based on demand, 750cfm capability, small primaries for good economy when cruising, big secondaries for when you need them. What more do you want? Rebuild it and download the rebuild information that Lars and others provide. You will save money and you won't be disappointed. [P.S. Those who speak badly of Q-jets either don't understand them or have a vested interest in you purchasing 'something else'.]
Drifting
Joined: Jul 2006
Posts: 1,259
Likes: 154
From: Deplorableville Nebraska
The Quadrajet is a good carb: flow based on demand, 750cfm capability, small primaries for good economy when cruising, big secondaries for when you need them. What more do you want? Rebuild it and download the rebuild information that Lars and others provide. You will save money and you won't be disappointed. [P.S. Those who speak badly of Q-jets either don't understand them or have a vested interest in you purchasing 'something else'.]
I also have a '70 350/350 L46. Now that I have had my carb rebuilt I cannot believe the difference. If your carb is the original 7040207, you have a very good time tested performance carb on your hands, and a valuable one at that. Is your carb original? If you cannot find someone local who knows these carbs, do a search on the c2 and c3 forums to find some of the performance rebuilders out there. The cost of a good performance rebuild should be no more, and probably less than a replacement carb of questionable repute.
