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392 hemi 2x4 manifold
#1489589
08/23/13 10:48 PM
08/23/13 10:48 PM
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Joined: Jan 2007
Posts: 1,039
Redwood City Ca.
B1arno
OP
super stock
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OP
super stock
Joined: Jan 2007
Posts: 1,039
Redwood City Ca.
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OK, so I have my single four barrel setup for sale and am going with two fours. Not a lot available for a 392 Hemi. A Weiand 7263 dual plane good from 2,000 rpm to 6,800 rpm, and the Hot Heads single plane good from 2,800 to 7,800. I have a good idea what I think will work best for what I want the car to do but I would appreciate some input from you guys.
The car is a 34 Dodge Highboy coupe, 392 Hemi, 4 speed, 3.23 gears, and full lenght headers. It has 10 to 1 comp, and a Howards .459 lift, 280 duration cam.
It will be completely street driven with an occasional cleaning of the combustion chambers. It will never see 7,000 rpm. The only reason I am thinking of possibly using the Hot Heads intake is because the car has a 4 speed and would tolerate the single plane better than an auto would.
Any thoughts?
Arno
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Re: 392 hemi 2x4 manifold
[Re: B1arno]
#1489599
09/30/13 10:23 PM
09/30/13 10:23 PM
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Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate
master
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master
Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
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I like them both Arno!!! That was a real good deal on that boat scoop too!   Mark
1996 Ram 1500 Sport
1968 road runner
1952 Sears Allstate licensed, pump gas, Hemi 5.98 @ 115.73 1.33 60 ft. The best is yet to come. Painless Performance / Street RODDER magazine Top 100 for 2019
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Re: 392 hemi 2x4 manifold
[Re: 62maxwgn]
#1489605
10/01/13 11:45 PM
10/01/13 11:45 PM
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Joined: Jan 2007
Posts: 1,039
Redwood City Ca.
B1arno
OP
super stock
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OP
super stock
Joined: Jan 2007
Posts: 1,039
Redwood City Ca.
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Quote:
I'm the other way,think the boat scoop looks like a mail box but that's just me !! 
HaHa! It kinda does.
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Re: 392 hemi 2x4 manifold
[Re: John_Kunkel]
#1489606
10/01/13 11:52 PM
10/01/13 11:52 PM
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Joined: Jan 2007
Posts: 1,039
Redwood City Ca.
B1arno
OP
super stock
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OP
super stock
Joined: Jan 2007
Posts: 1,039
Redwood City Ca.
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Quote:
I prefer the oval billet AC.
I liked this one too but didn't feel it went with the rest of my car. It looks like you have the four barrels on progressive linkage. Is that right and how does it work with that manifold? I wouldn't think it would get even fuel distribution.
Arno
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Re: 392 hemi 2x4 manifold
[Re: B1arno]
#1489607
10/02/13 01:05 PM
10/02/13 01:05 PM
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Joined: Jan 2003
Posts: 25,823
Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,823
Rio Linda, CA
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Any 2 X 4 setup is gonna get better fuel distribution with straight linkage but most factory setups were progressive; running the rear carb as the primary. In my case, there was less throttle response with the progressive.
The INTERNET, the MISinformation superhighway
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Re: 392 hemi 2x4 manifold
[Re: John_Kunkel]
#1489609
01/12/14 09:24 PM
01/12/14 09:24 PM
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Joined: Jan 2003
Posts: 3,575
The Netherlands
BigBlockMopar
master
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master
Joined: Jan 2003
Posts: 3,575
The Netherlands
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I've had a dual 4 on my 354 Chrysler poly engine for a short while. Was an upgrade from a single 2-bbl intake. Had some trouble with one of the carbs so I had to change to a single stock 4-bbl 392 Hemi intake instead. I have a 392 in the works that will receive the dual 4 intake instead. 
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Re: 392 hemi 2x4 manifold
[Re: B1arno]
#1489612
01/13/14 05:22 AM
01/13/14 05:22 AM
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Joined: Aug 2003
Posts: 43,201
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,201
Bend,OR USA
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Work on one circuit of the carb. at a time I would use the metering rods upper step to control the part throttle mixtures, get it right and then work on using the rear jets to get the wide open miture perfect I would try using a pair of two inch spacer under the carbs to increase the plenum volume and help make the motor more responcieve(SP?) to the throttle  I'm not sure if the four hole spacer on the open two inch spacers would work better  Using the two throttles hook together on a one to one ratio works way better on those stock type single plane dual quad intakes than trying to use them progressively like the later model dual plane intakes like the 426 Street Hemi intakes. I use to have a Chrysler 1955 331 Hemi in a 1934 Ford truck that I put a stock cast iron dual quad intake like yours on it, it didn't work worth a hoot with the AFB carbs hooked up progressively  Same thing on my 1957 Chrysler 300C with the stock WCFB carbs., not worth a hoot hooked up stock IHTHs
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 392 hemi 2x4 manifold
[Re: Cab_Burge]
#1489613
01/18/14 05:33 PM
01/18/14 05:33 PM
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Joined: Jan 2007
Posts: 1,039
Redwood City Ca.
B1arno
OP
super stock
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OP
super stock
Joined: Jan 2007
Posts: 1,039
Redwood City Ca.
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Quote:
Work on one circuit of the carb. at a time I would use the metering rods upper step to control the part throttle mixtures, get it right and then work on using the rear jets to get the wide open miture perfect I would try using a pair of two inch spacer under the carbs to increase the plenum volume and help make the motor more responcieve(SP?) to the throttle I'm not sure if the four hole spacer on the open two inch spacers would work better Using the two throttles hook together on a one to one ratio works way better on those stock type single plane dual quad intakes than trying to use them progressively like the later model dual plane intakes like the 426 Street Hemi intakes. I use to have a Chrysler 1955 331 Hemi in a 1934 Ford truck that I put a stock cast iron dual quad intake like yours on it, it didn't work worth a hoot with the AFB carbs hooked up progressively Same thing on my 1957 Chrysler 300C with the stock WCFB carbs., not worth a hoot hooked up stock IHTHs
Hey, Thanks for the tips! Right now I'm just trying to get it idling without my eyes watering. Then I will work on the other circuits. The two inch spacers I think, will work well in my situation. I'm not sure which way to go, the four hole or open plenum either. This is strictly a street car rarely see high RPM so which one will build more torque?
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Re: 392 hemi 2x4 manifold
[Re: BigBlockMopar]
#1489615
01/19/14 09:12 PM
01/19/14 09:12 PM
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Joined: Jan 2007
Posts: 1,039
Redwood City Ca.
B1arno
OP
super stock
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OP
super stock
Joined: Jan 2007
Posts: 1,039
Redwood City Ca.
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Quote:
Four-holed spacers make more low/mid rpm torque by increasing the vacuumsignal to the carbs.
Thanks Bigblock!
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Re: 392 hemi 2x4 manifold
[Re: B1arno]
#1489616
01/23/14 01:43 PM
01/23/14 01:43 PM
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Joined: Jan 2003
Posts: 7,490
Minnesota
Hemi_Joel
master
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master
Joined: Jan 2003
Posts: 7,490
Minnesota
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Since it is so rich at idle, have you tried softer step up springs?
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: 392 hemi 2x4 manifold
[Re: B1arno]
#1489617
01/24/14 01:23 AM
01/24/14 01:23 AM
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Joined: Nov 2005
Posts: 15,119
85086
moparpollack
Lil Herman
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Lil Herman
Joined: Nov 2005
Posts: 15,119
85086
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56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d
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Re: 392 hemi 2x4 manifold
[Re: B1arno]
#1489618
02/21/14 05:09 PM
02/21/14 05:09 PM
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Joined: Dec 2012
Posts: 8
41hemitrk
member
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member
Joined: Dec 2012
Posts: 8
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I think you need more carbs! I like 6
Last edited by 41hemitrk; 02/21/14 05:11 PM.
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