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01-24-2012, 06:31 PM
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Join Date: Feb 01, 2010
Location: Michigan
Posts: 247
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AMC401 w/dual quads on Offy intake
Just built it for a buddy of mine. If nothing else, there is a certain cool factor to it....
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01-24-2012, 06:33 PM
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Join Date: Jan 20, 2006
Location: The Great Googley Moogley Midwest.
Posts: 13,771
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yes there is.
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Quote:
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Originally Posted by Hankrod
Ristows right.................again,
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It's like you're unraveling a big cable-knit sweater that someone keeps knitting...and knitting...and knitting...and knitting...
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01-25-2012, 01:14 AM
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Master Mechanic
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Join Date: Nov 18, 2009
Location: France (burgundy)
Posts: 1,297
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I guess that the offy intake is the only AMC intake for dual carbs still available ?
Do you think that you get a few more hp with this one ?
__________________
80 CJ7 Laredo V8
81 J10 sportside I6
77 J10 Golden Eagle V8
80 Cherokee Golden Eagle with a 401, for parts
63 wagoneer for resto or parts ?
98 Grand Cherokee 5.9L
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01-25-2012, 02:38 AM
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FSJ Maniac
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Join Date: May 17, 2007
Location: Algonquin (Chicago suburb) Illinois
Posts: 3,669
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I want that in my living room 
throw those edelbrock's away and and get some holley's so u can use that power
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91' Grand Wagoneer
401/727/229, HEI, Edel 2131 Intake,8600, Holley Truck Avenger, Dual Exhaust, Flowmaster 70. Edelbrock shorty headers.4" BJS 31 BFG Mud-Terrains
Currently: Down for Body Work
80's J10 258/T-5/208
90' Jeep GrandWagoneer SOLD
74' J10 Go Grabber Green Running
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Originally Posted by Heavy_Metal_Thunder_81
Inferior Chevy
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01-25-2012, 04:10 AM
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Señor Jackhead
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Join Date: Aug 21, 2002
Location: Jubilee Jeeps.SWCO
Posts: 22,054
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Definitely Cool.
but those Hedmans have to be robbing power... 
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If you want to PM me, go to FSJNETWORK.COM
it's just a flesh wound
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01-25-2012, 05:45 AM
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FSJ Maniac
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Join Date: Dec 11, 2004
Location: Byron, MI
Posts: 4,381
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Very nice.
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Originally posted by Ristow flowmasters sound like canned crap they're all built the same, just the higher numbers put the crap in a bigger can.
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01-25-2012, 06:36 AM
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Moderator
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Join Date: Oct 09, 2003
Location: tucson,az
Posts: 2,062
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Really cool.
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77 Cherokee 401/400 trans,Holley on edelbrock performer,PT 1339
d44s,detriot rear ,diff guards front and rear
Fabbed front and rear bumpers,Tire carrier
33"BFG KM2's on black spokes
Tadrack
Interior upgraded,Durango console, custom gauge panel,bucket seats
Soa,with 1" shackle up front
Hood vents
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01-25-2012, 07:13 AM
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Member
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Join Date: Feb 01, 2010
Location: Michigan
Posts: 247
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"I guess that the offy intake is the only AMC intake for dual carbs still available ?" YES, unless you can find a used Cross Ram or Tunnel ram.
"Do you think that you get a few more hp with this one ?" NO. It has been proven that a Torker intake with a single 4 BBL carburetor will out perform the dual quad Offy.
I would prefer Holleys myself but it is not my engine. Adapter plates would have to be made to fit Holleys to the manifold. The center to center distance for the carbs is too close to fit Holleys as it is.
The headers are just for the starting stand... The owner is actually going to run the Free Flow exhauxt manifolds. |
01-25-2012, 07:22 AM
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Señor Jackhead
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Join Date: Aug 21, 2002
Location: Jubilee Jeeps.SWCO
Posts: 22,054
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Don't get me wrong, I like Hedmans... It usually sparks some discussion to roll your eyes by.
401s are a beautiful thing.
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If you want to PM me, go to FSJNETWORK.COM
it's just a flesh wound
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01-25-2012, 08:29 PM
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Member
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Join Date: Feb 01, 2010
Location: Michigan
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We are going to dyno it next week just to get the carbs set right. He is going to run stock exhaust manifolds so, I kinda expect the numbers to be a little low. I am surprised that no one has asked about the cam.... It is not that big, it is a Isky 280HL. The engine is a cast piston 401 with '70 heads. (Multi angle valve job and I just cleaned up the ports a little bit) The compression ratio should be close to 10.2:1.
Any guesses on HP and torque??
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01-25-2012, 09:35 PM
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Member
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Join Date: Jul 03, 2009
Location: Southern Illinois
Posts: 171
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Quote:
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Originally Posted by SC/397
We are going to dyno it next week just to get the carbs set right. He is going to run stock exhaust manifolds so, I kinda expect the numbers to be a little low. I am surprised that no one has asked about the cam.... It is not that big, it is a Isky 280HL. The engine is a cast piston 401 with '70 heads. (Multi angle valve job and I just cleaned up the ports a little bit) The compression ratio should be close to 10.2:1.
Any guesses on HP and torque??
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300/400 Does Offy make a single 4BBL intake, or am I imagining that?
Nevermind, a little quality time with Summit and i answered my own question.
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Jess
1976 J10, 360 2v, TH400, Q/T, 131"
1979 CJ-5, 258 2v, 3-spd - Sold
1992 XJ Laredo 2-Dr, 4.0L, Auto - Sold
1992 YJ Islander, 4.0L, Auto
Last edited by JAWs7227 : 01-25-2012 at 09:46 PM.
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01-25-2012, 10:17 PM
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Grease Monkey
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Join Date: Jan 11, 2003
Location: Simi Valley, CA
Posts: 453
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Sounds nice. I would live to find an engine stand like that so I could run an engine and tune it up/break it in before installing in the car.
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1980 J-10<br />Rusty\'s 4 inch lift<br />2 inch body lift,<br />35 in Xterrains on J20 axles<br />4:30 gears<br />Detroits<br />In-Cab cage thru the dash
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01-25-2012, 10:22 PM
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Master Mechanic
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Join Date: Jul 02, 2004
Location: Middleville, Michigan
Posts: 1,401
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The intake is kind of a wildcard to me, I'd have to guess 325hp/415tq based on a very similar build but with an air gap. Looks and sounds great as usual. What is this going in? Should be a great all-around piece.
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1976 Wagoneer - Just an 11 second street car
1983 Cherokee WT - IFS, trailing arm rear, full cage, turbocharged AMC 429
http://www.cardomain.com/id/Ghinmi
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01-26-2012, 06:43 AM
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Member
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Join Date: Feb 01, 2010
Location: Michigan
Posts: 247
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The engine is going in to a '70 AMX.
Yes, Offenhauser used to make a few different 4BBL intake manifolds for AMC's. The Dual Quad, 360 equal flow, Sonic Dual Port and even a spread bore intake.
Last edited by SC/397 : 01-26-2012 at 07:36 PM.
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01-26-2012, 09:39 PM
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Bleedin' Gasoline
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Join Date: Oct 12, 2008
Location: Lake Geneva Wisconsin
Posts: 1,782
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Sounds great, Rick!...
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1977 J-20, 4bbl 360/t-18, 33"s.
1976 CJ-5 mild 360/t-18, 6" lift, 35"s.
1972 Javelin SST, full roller Indy head AMC 360. Under cunstruction.
AMC ya!!
Alfano Performance
Kenosha, WI 53142
http://www.alfanoperformance.com
For your AMC performance parts.
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01-27-2012, 06:50 AM
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King Browless
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Join Date: Nov 30, 2001
Location: Fort Wayne, Indiana
Posts: 6,445
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In July '08, my wife and I attended the 39th Street Rod Nationals in Louisville, KY.
While there, we strolled through the swap meet and saw this intake.
I know nothing more about it, but am presenting it here to the group.
__________________
Bryan Smith
1982 J10: Replacement engine now sitting in the truck! No Cab Brow! Future DD
1981 J20: Commercial flat bed. Long term Project: RUST! No Cab Brow!
Quote:
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Originally Posted by Jayrodoh
...but if it works, I wouldn't touch it.
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Quote:
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Originally Posted by Lindel
Best laid plans, yada yada yada...  |
Quote:
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Originally Posted by Ristow
because Ristow sez so
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When the IFSJA forum has a problem go here:
www.fsjnetwork.com
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01-27-2012, 06:56 AM
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Member
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Join Date: Feb 01, 2010
Location: Michigan
Posts: 247
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I wonder where that thing ever went. Someone went through a lot of trouble to make that plenum just for show off purposes..
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01-27-2012, 02:24 PM
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Member
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Join Date: Feb 01, 2010
Location: Michigan
Posts: 247
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With ported Exhaust Manifolds
I grind out the smog tube embossments on the inside.
With the Edelbrock Shorty Headers
I hope to to a real A to B comparison between the two on the dyno this Monday.
Last edited by SC/397 : 01-27-2012 at 02:26 PM.
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01-30-2012, 09:05 AM
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Member
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Join Date: Feb 01, 2010
Location: Michigan
Posts: 247
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Results:
Free Flow Manifolds (ported)::::: 366.2 Hp @5050 401 #/ft Torque @ 3800
Edelbrock Shorty Headers:::::::: 368.7 Hp @5250 411 #/ft Torque @ 4300
Hedmond Long Tube Headers::::: 382.0 Hp @5050 430 #/ft Torque @ 4300
Ghinmi, you were pretty close. In my humble opinion I think that the Offy intake hurt the horsepower. I believe that a Torker or Air Gap with a single 800 Holley would have gained another 20 HP at least. Fun stuff! I started a new thread on the Header Comparo..
Last edited by SC/397 : 01-30-2012 at 09:10 AM.
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02-14-2012, 09:24 PM
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Master Mechanic
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Join Date: Apr 01, 2003
Location: Massachusetts
Posts: 961
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What vehicle is this going in? I scanned the thread but sorry if I missed it. Will it have open element air cleaners or any kind of ram air setup? I've been wondering and reading a bunch lately on open element cfm flow vs. cold air intakes, dual snorkels and all that. Just curious what this engine will use.
__________________
Mike
1973 J4000, 360 2bbl, T18, Model 20,
44, 60-2, 32x11.5x15" on 15x8" CJ wagon wheels.
Now in black primer.
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