QFT carb question
Thread Starter
Drifting
Joined: Jul 2015
Posts: 1,765
Likes: 253
From: Catlett VA
QFT carb question
I'm trying to find the cfm rating for the QFT Q series carb that came on the NOM 454 in my 68 convert. I tried to get info from the PO- no luck. QFT tech services said there is a model number on the bottom of the carb. There is no number- only "Patent pending" in the casting and the QFT nameplate on the top of the fuel bowls. The diameter of all four barrels, measured at the butterfly is 1.784 inches. Does someone have a tech sheet that has specs that might help ? Or.... a Holley spec sheet? The QFT looks like a Holley clone and might have the same specs. I think it is either a 750 or 850 cfm.
RA
RA
Thread Starter
Drifting
Joined: Jul 2015
Posts: 1,765
Likes: 253
From: Catlett VA
Thread Starter
Drifting
Joined: Jul 2015
Posts: 1,765
Likes: 253
From: Catlett VA
The SS model has a choke. This is a Q series. No choke, mechanical secondaries, double pumper. I found specs for some other models which show everything 850 cfm or greater has 1 3/4 inch throttle bores- 850, 950 1050, etc all have the same bore, so I'm not sure what I have. There are no model numbers anywhere on the carb to help ID it, So it is at least an 850 cfm, maybe bigger. The engine goes like hell, so maybe I should not worry about it.
Thread Starter
Drifting
Joined: Jul 2015
Posts: 1,765
Likes: 253
From: Catlett VA
Le Mans Master
Joined: Mar 2001
Posts: 5,737
Likes: 644
From: Lincoln, CA
Correct, when I removed the front metering block SS830 was written in the housing.
Worth looking.
Also you show a choke horn. Maybe they removed it the choke parts. All the Q's on the website don't show the choke horn.
Worth looking.
Also you show a choke horn. Maybe they removed it the choke parts. All the Q's on the website don't show the choke horn.
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Racer
Joined: Feb 2009
Posts: 273
Likes: 11
From: Algona, WA
I agree with this. Looks like the choke was removed. Still has the air horn for the choke in the main body. If it were a q series it would not. Air bleeds. Squirters and Jets will tell which one.
Go to the Quickfuel site for specs of each.
Dave
Go to the Quickfuel site for specs of each.
Dave
Thread Starter
Drifting
Joined: Jul 2015
Posts: 1,765
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From: Catlett VA
carb
Thanks for the help jogging my failing memory banks. RA
Thread Starter
Drifting
Joined: Jul 2015
Posts: 1,765
Likes: 253
From: Catlett VA
What a lovely, convenient place to put the model number! You have to take the carb apart to find it. I note the Proform on the casting. Does QFT manufacture their carbs using other vendors parts? This is the first QFT product I have had and my first impression was that it is a Holley clone. Nearly every part looks the same as the corresponding part on a Holley. Any info on the QFT corporate history?
Le Mans Master
Joined: Mar 2001
Posts: 5,737
Likes: 644
From: Lincoln, CA
Yes they use the Proform body, but I believe they make the base and metering plates.
It is a Holley clone. You can buy Holley jets, gaskets, bleeds and such under the Holley name.
I went with them because of the adjustability options and build quality.
It is a Holley clone. You can buy Holley jets, gaskets, bleeds and such under the Holley name.
I went with them because of the adjustability options and build quality.
Burning Brakes
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From: Deep South Denmark