4972s thermoquad

boss351 · 04-08-2016, 07:56 AM

hi ,I have a thermoquad 4972s ,1971 340 duster 4 speed ,how much cfm for this carb ,thanks

Denny Steward · 04-08-2016, 09:29 AM

They are advertised as 800 cfm but they flow more like 750 cfm hope this helps

GTX JOHN · 04-09-2016, 03:38 AM

I have had good success running that
number on our stockers.

They flow about like any other small primary
Thermoquad.

I wish I could find another one......I find them easier to tune.

Rod Greene · 04-09-2016, 09:26 PM

So what is a ford guy doing with a Mopar carb. I would be glad to take it off your hands.

Jim Wahl · 04-11-2016, 10:48 PM

The '71 carb is harder to find jets for, unless you convert them to holley jets. Just sayin'. I prefer the 6138 or 6139 carb from the '72 340. Jim

.

Jared Jordan · 04-11-2016, 11:14 PM

The big advantage to that carb is the lack of well seals ("X-rings"). That's the only annoying thing about the later versions. However, as Jim said, the 4972 and 4973's are hard to find parts for. Don't be surprised to pay big $ if you do find them. Ask me how I know.

George Mirza · 04-12-2016, 07:30 PM

Does anyone have a strip kit for the 4972 carb. I'm looking for the jet sizes that the kits had in them. I have a 4972 that I tried a few times, but the jetting is calibrated completely different from the newer style TQ's.

FED 387 · 04-12-2016, 10:58 PM

Small primary rated At 800 cfm large primary 850 cfm

Denny Steward · 04-13-2016, 11:06 AM

George you have a PM

GTX JOHN · 04-13-2016, 03:48 PM

I also would be interested in any 71 Parts/Kits/Carbs.

04-08-2016, 07:56 AM	#1
boss351 Junior Member Join Date: Feb 2010 Posts: 43 Likes: 0 Liked 0 Times in 0 Posts	4972s thermoquad hi ,I have a thermoquad 4972s ,1971 340 duster 4 speed ,how much cfm for this carb ,thanks

04-08-2016, 09:29 AM	#2
Denny Steward Member Join Date: Oct 2002 Location: PORT ORANGE FL Posts: 273 Likes: 373 Liked 112 Times in 20 Posts	Re: 4972s thermoquad They are advertised as 800 cfm but they flow more like 750 cfm hope this helps __________________ Denny Steward GT/JA 246

04-09-2016, 03:38 AM	#3
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,528 Likes: 2,222 Liked 1,792 Times in 571 Posts	Re: 4972s thermoquad I have had good success running that number on our stockers. They flow about like any other small primary Thermoquad. I wish I could find another one......I find them easier to tune. __________________ John Irving 741 Stock 741 Super Stock Last edited by GTX JOHN; 04-09-2016 at 03:40 AM.

04-09-2016, 09:26 PM	#4
Rod Greene Senior Member Join Date: Mar 2002 Location: TN Posts: 514 Likes: 355 Liked 204 Times in 72 Posts	Re: 4972s thermoquad So what is a ford guy doing with a Mopar carb. I would be glad to take it off your hands. __________________ Rod Greene Real men shift for them selves. Slowly working on TA Challenger for D,E/S and a 72 Challenger for SS/K, L as if I don't have enough other projects.

04-11-2016, 10:48 PM	#5
Jim Wahl Veteran Member Join Date: Jan 2002 Location: Central Florida Posts: 5,841 Likes: 626 Liked 672 Times in 121 Posts	Re: 4972s thermoquad The '71 carb is harder to find jets for, unless you convert them to holley jets. Just sayin'. I prefer the 6138 or 6139 carb from the '72 340. Jim . __________________ Jim Wahl....NHRA #2239 S/SS - IHRA # 8 Stock, D2 Stock Champion (forever I guess) 2019 Baby Gators Stock Champion 2009 D2 National Open Stock Champion 1981 D2 West Palm Beach LDRS SS Runner Up Past President, Southern Stock / Super Stock Association. SSSSA Forum Moderator

04-11-2016, 11:14 PM	#6
Jared Jordan Senior Member Join Date: Jun 2004 Location: Modesto, CA Posts: 544 Likes: 115 Liked 222 Times in 68 Posts	Re: 4972s thermoquad The big advantage to that carb is the lack of well seals ("X-rings"). That's the only annoying thing about the later versions. However, as Jim said, the 4972 and 4973's are hard to find parts for. Don't be surprised to pay big $ if you do find them. Ask me how I know. __________________ Jared Jordan 7503 SS and Stk

04-12-2016, 07:30 PM	#7
George Mirza Senior Member Join Date: Jan 2002 Location: North Attleborough Ma. Posts: 522 Likes: 0 Liked 0 Times in 0 Posts	Re: 4972s thermoquad Does anyone have a strip kit for the 4972 carb. I'm looking for the jet sizes that the kits had in them. I have a 4972 that I tried a few times, but the jetting is calibrated completely different from the newer style TQ's. __________________ GEORGE MIRZA STK 1236

04-12-2016, 10:58 PM	#8
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,349 Likes: 324 Liked 280 Times in 150 Posts	Re: 4972s thermoquad Small primary rated At 800 cfm large primary 850 cfm

04-13-2016, 11:06 AM	#9
Denny Steward Member Join Date: Oct 2002 Location: PORT ORANGE FL Posts: 273 Likes: 373 Liked 112 Times in 20 Posts	Re: 4972s thermoquad George you have a PM __________________ Denny Steward GT/JA 246

04-13-2016, 03:48 PM	#10
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,528 Likes: 2,222 Liked 1,792 Times in 571 Posts	Re: 4972s thermoquad I also would be interested in any 71 Parts/Kits/Carbs. __________________ John Irving 741 Stock 741 Super Stock