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-   -   demon 72 ,71 340 carb (http://www.moparchat.com/forums/showthread.php?t=90343)

demons72 04-27-2005 12:25 PM

demon 72 ,71 340 carb
 
Does anyone know what type (name) of 4 barrel carburator came stock with a 1971 demon 340 engine? I have a hood scoop, with two holes on the bottom . The j heads, were they stock for the 71 engine? The car is late nov. 1971 but considered a 72. :toast:

dwc43 04-27-2005 01:14 PM

J heads with 2.02 valves are stock. The stock carb is a Carter Thermoquad rated at 800 cfm. You can still get them from Advance auto for one. Holley builds them with all noew parts now. The hood scoops were never hooked up to anything. :trans:

Fast_Eddie 04-27-2005 02:31 PM

DW's correct, the two holes were never hooked up to anything. These indicate your car had the twin scoops hood and not the dual snorkel, single sccop hood.

Strange really because most "late" 71's had the latter style hood.

demons72 04-27-2005 03:04 PM

my mistake, it does have a dual snorkel(connected) Are the holes then for show or ventilation? So no weird hook up for the snorkel to the carb?

dwc43 04-27-2005 03:33 PM

THey add a little fresh air under the hood, but there is nothing to connect to the air cleaner. :cool:

DEMON SIZZLER 04-27-2005 04:06 PM

Quote:

Originally Posted by demons72
Does anyone know what type (name) of 4 barrel carburator came stock with a 1971 demon 340 engine? I have a hood scoop, with two holes on the bottom . The j heads, were they stock for the 71 engine? The car is late nov. 1971 but considered a 72. :toast:


You will not find the '71 340 one year only air metered T.Q. carb at an auto parts store. These are scarce carbs and were often replaced with a '72 340 solid fuel metered T.Q. carb. The '71 340 Demon used the twin Super Bee/Coronet R/T hood scoops while the '72 340 Demon used the optional twin snorkle single hood scoop. The '72 340 scoop option hood had two holes closer togther than the '71 twin scoop hood. Also the build date you indicated
is a '72 model that used the 'J' or 915 1.88" intake valve heads while the '71 340 'J' head used a 2.02" intake valve. If you try to order a rebuilt T.Q. carb from an auto parts store, it is likely that you will get a poor performing smogger carb!

demons72 04-27-2005 07:42 PM

My car has the twin snorkle single hood scoop. It has the 72 body style although it was made in nov of 1971. The holes are close together in the hood. so the carter 4 bbl carb was the original? and no other hook up for the twin snorkle?

demons72 04-27-2005 08:42 PM

1 Attachment(s)
Here is the picture of my 1972 demon, Paid $50 canadian dollars when I was sixteen. Its being restored back in Manitoba. :)

gthomas 04-27-2005 08:45 PM

1972 340 w/manual trans = 6138S
1972 340 w/auto trans = 6139S

dwc43 04-27-2005 10:19 PM

Quote:

Originally Posted by demons72
My car has the twin snorkle single hood scoop. It has the 72 body style although it was made in nov of 1971. The holes are close together in the hood. so the carter 4 bbl carb was the original? and no other hook up for the twin snorkle?


Sept. '71 build dates up to 12 '71 are considered '72's and they are titled as such. Your car has the correct scoop and hood. And the Carter Thermoquad is the original carb for your 340. From '71 and up the Thermoquad is stock on all 340 and 360 engines and when the 318 went to a 4bbl engine it got the same Thermoquad as well. :king:

Fast_Eddie 04-28-2005 08:37 AM

Quote:

Originally Posted by DEMON SIZZLER
The '71 340 Demon used the twin Super Bee/Coronet R/T hood scoops while the '72 340 Demon used the optional twin snorkle single hood scoop. The '72 340 scoop option hood had two holes closer togther than the '71 twin scoop hood.

As said before, late build '71 models used the '72 style hood/scoop.

DEMON SIZZLER 04-28-2005 10:54 AM

Just through the '74 model year, there was a total of 16 different models used
and about double that figure from '75 through '85(this includes the SuperQuad replacement 800 cfm carbs)models. The carbs changed physically and internally year by year. It is crucial to get the correct carb for your application no matter what brand it is! :D

forsko 05-15-2005 02:15 PM

Wrong thread.

tim 05-15-2005 05:12 PM

hood and springs
 
Hi all just reading this thread and wondering if i should buy the super stock springs for my 71 demon I am in the process of selling the car and it is soft in the rear end, has new mopar shocks. Also demon 72 my 71 has the scoop like yours, i always thought it was 72 scoop, and hood, never thought when the car might have been built. Thansk Tim

tim 05-20-2005 11:45 PM

yup wrong thread sorry guys, but I have question about carbs also, I had original on both my 73 barracuda 340 and my 71 demon 340. I have mislplaced one but did find the carter with the black plastic float bowels, which carb would this one be for as i can,t remember and never took any pics, thanks Tim


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