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Quick Fuel Cast Aluminum Carburetor 680 cfm


made in usa

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Cast Aluminum Carburetor 680 cfm
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Cast Aluminum Carburetor
  • 680 cfm
  • Vacuum Secondaries
  • Free Shipping - Ships

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    HR-680-VS - Quick Fuel Hot Rod Aluminum Carburetors is rated 4.0 out of 5 by 9.
    Rated 5 out of 5 by from Amazing right out of the box I installed this Quickfuel 680 with vacuum secondaries on my 454 big block to replace an older Quickfuel 4150 clone of unknown size that needed some love. The new 680 was adjusted nearly perfectly out of the box. Once I got fuel to it, it came to live and the 454 has never had more power and pep. I only had to open the idle mixture screws 1/2 a turn and tweak the idle speed to get peak vacuum. The installation directions are good and helpful without being vague, difficult to understand, or too short. You do need to be somewhat of a gearhead or a carburetor person to get the most from the directions. Hat tip to the Quickfuel folks for recommending this model and delivering a fine product.
    Date published: 2019-01-26
    Rated 5 out of 5 by from Best Carb I ever bought I finally needed a replacement carb for my BB El Camino as the AFB that came on it was not worth even rebuilding. The more I read more people were raving about the QF carbs. When I learned every carb is run on an engine at a flow bench, tuned by hand, that was it. I literally bolted the thing on and once the bowls were filled with fuel that engine ran better than ever. All I did was set the idle stop screw. The features like the visible sight glass to see what height the floats are at, adjustable vacuum secondaries and a bunch of othe features Holley and Edlebrock should have done 100 years ago. BTW Holley wound up buying this company but left them alone to make a better carb. Can’t beat um, Buy um. Don’t think twice on which carb to get. Trust me even though you don’t know me.
    Date published: 2018-10-31
    Rated 5 out of 5 by from Best Carb I ever bought!!! This is the best carburetor I have ever bought. I bolted it on my new SP 383 Deluxe engine and it fired on the first try. Only had to adjust curb idle and idle mixture screws and this carburetor runs like a champ. I highly recommend this carb for your street/ strip muscle car.
    Date published: 2018-09-07
    Rated 5 out of 5 by from This is a replacement to carb damaged to fire. This is a super carb. I have it in my 32 Ford highboy roadster.355cuin,2500 stall speed 350turbo. Full blueprinted and balanced. This really woke up this car. No comparisons to Holley or Edelbrock
    Date published: 2017-10-02
    Rated 5 out of 5 by from Great product and service I did quite a bit of comparision research before spending my hard earned money. The adjustability vs price this carb was the winner. I called QF tech line for help in choosing which carb was best matched to my overall combo. Also suggested a fuel regulator - which I did purchase. Tech line was very very helpful - asked questions and answered mine - seem like good people. Installed carb and it was very close out of the box. I did notice it was alittle rich and called QF tech again - same great experience. End result is a car which is much more enjoyable/worry free/great performance. Thank you Jegs for carring such a greatt product line!
    Date published: 2016-02-11
    Rated 3 out of 5 by from Carb recommended for my ATK HP98M 350/345hp from JEGS. Adjusted the carb several times and had a mechanic give it a shot. No luck. Floods, stalls out on accelerating.
    Date published: 2020-12-01
    Rated 2 out of 5 by from Runs to rich I bought an ATK Chevy 350 Crate Motor from Jegs and they recommended this carb. This carb it way too much for this 345HP engine. It runs too rich at idle and if you lean it out, the engine backfires. Not a good carb for high performance street engines. Searching for another new carb in the 600CFM range.
    Date published: 2020-05-07
    Rated 1 out of 5 by from Garbage recommendation.... Bought an ATK crate 302. Jegs recommended this carb. Does nothing but flood. Might be good on some other application, but already having to order a new carb. Thanks Jegs...
    Date published: 2019-03-26
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