Quick Fuel Carb
Printed From: The Ford Torino Page
Category: Model Specific Forum
Forum Name: General Automotive Technical Discussion
Forum Description: Technical Automotive discussion of anything not specific to mid-size Ford/Merc
URL: https://forum.grantorinosport.org/forum_posts.asp?TID=21171
Printed Date: 26-March-2026 at 3:20PM
Software Version: Web Wiz Forums 12.06 - https://www.webwizforums.com
Topic: Quick Fuel Carb
Posted By: 72FordGTS
Subject: Quick Fuel Carb
Date Posted: 14-March-2024 at 8:51AM
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I am thinking of dumping my Holley 670 SA and going to a Quick Fuel HR-680-VS. I found a good deal on one. Anyone have any experience with these carbs? They have decent reviews on Summit. https://www.summitracing.com/parts/qft-hr-680-vs/reviews" rel="nofollow - https://www.summitracing.com/parts/qft-hr-680-vs/reviews ------------- Vince 1972 Ford GTS Sportsroof - Survivor, One Family car GTS.org Admin |
Replies:
Posted By: aquartlow
Date Posted: 14-March-2024 at 12:22PM
Hey Vince, I haven't tried a Quick Fuel carb yet, supposed to be an upgrade over a Holley, but who knows. I do know the Holley Sa's are usually too lean just off idle-the idle feed restrictor in the primary metering block usually needs upsized about .001-.003" another issue is the vacuum tube needs to be installed in the primaries for correct activation of the vacuum secondaries. Here's a pic of said tube: Sometimes Holley omitted these for some unknown reason, leaving only a hole in the venturi wall, without the tube the secondaries will not fully open or sometimes not open at all. Easy to fix but requires apiece of 1/8" brass tube and an appropriate drill bit. Hope this helps. sorry for the large image. ------------- www.supermotors.net/22468 Yeah, It's a Hybrid...It burns gas and tires. No matter how good she looks, somebody, somewhere, is tired of her sh*t. Beauty is skin deep, ugliness goes clear to the bone. |
Posted By: 72FordGTS
Date Posted: 15-March-2024 at 12:28AM
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Thanks Todd. I only run a 670SA (I think you have the bigger 770 based on a 750 carb?) which has the main body and metering blocks from the classic 600. I have the carb tuned well with an AFR, but it just never seemed as crisp and responsive as I wanted. I found the a local vendor selling the QF for a great deal, so I figured maybe I should give it a shot and I can sell my SA and get most of my money back. It apparently has better metering blocks, downleg boosters, replaceable airbleeds, and I think might be a better match for my engine. I may give it shot and try it out, just wanted to see if anyone else has run one here. ------------- Vince 1972 Ford GTS Sportsroof - Survivor, One Family car GTS.org Admin |