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Availability of Offy Quadrajet Intake |
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Buzzman72
AMC Addicted Joined: Sep/15/2009 Location: Southern IN Status: Offline Points: 2725 |
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Posted: Apr/17/2021 at 2:27pm |
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Anyone know of someplace that has the Offenhauser 6057-DP single 4-barrel spread bore intake in stock?
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Buzzman72...void where prohibited, your mileage may vary, objects in mirror may be closer than they appear, and alcohol may intensify any side effects.
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wrebelmachine
AMC Apprentice Joined: Aug/08/2019 Location: SW Missouri Status: Offline Points: 162 |
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No and you cannot even get Offy to contact you back. I guess maybe a phone call to them but email and facebook gets you nothing.
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AMXFSTBK390
AMC Addicted Joined: Oct/22/2013 Location: SF Bay Area Status: Offline Points: 3489 |
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I'v used a carb plate adapter in the past for Rochester spread bores, when there is hood clearance.
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Questions are powerful tools...what's in your toolbox?
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304-dude
AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9082 |
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Back in the day i paid about $400.00 special order from Tognotti's. It was around 1990 or so. I went with the single port 360 and bought the new Holley 650cfm double pumper with integral top to change jets without need to empty the bowles. It was rare then, and very rare now. The dual quad is fairly hard to come by, and i never seen another 360 like it. Because I ran it on a stock 304 i used a segregated port spacer that was 1" tall. Ran like the devil when secondaries were engaged. |
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6884 |
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PM sent.
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Sonic Silver
Supporter of TheAMCForum Joined: Nov/23/2011 Location: East Tennessee Status: Offline Points: 7950 |
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304-dude
AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9082 |
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So they are only reproducing the DP 360 version? The spread bore 360 single port never lost any low end over my stock 2bbl, in fact i had very strong pulls just off idle on low speed coasting, and that was with my 2.76 mopar rear. The stock 2.89 never pulled as hard, with or without dual exhaust. |
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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Sonic Silver
Supporter of TheAMCForum Joined: Nov/23/2011 Location: East Tennessee Status: Offline Points: 7950 |
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On your intake, are you talking about the Offy 360 with a single divider wall running the entire length of the intake? It is a single plane, divided right from left. The left side primary and secondary of the carb feed cylinders 1,3,5,7 and the right side primary and secondary feed 2,4,6,8.
In the Dual Port, the 2 small round front carb openings feed all 8 cylinders running on the very bottom of the intake, and the 2 secondary holes feed all 8 cylinders in a higher plane, and are insulated from underneath heat by the bottom plane.
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304-dude
AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9082 |
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Back when i ordered the Spread bore 360, they had both versions, DP and Single port. The design was divider like you stated, but i used a spacer that segregated each venturi. I wanted low end velosity, since it is stock RPM street use. I was aware of the DP, but Popular HotRodding, did a spread or some feed back on DP intake. Which did not favor the overall performance, like you stated with modding one. So i went my direction to tune down the standard 360 spread bore intake. Not sure but the Holley at the time fit just right being a spread bore and all. The only Holley i came across at the time that fit such an application for upgrading quadra jet intakes. At the time some speed shops said i had been smoking weed. Wanted to sell me a sp2p or performer which did not have spread bore. Never had a fire, or spit back. Easily tuned the 650, and ran it like i stoll it, which made some people notice by my 55MPH 1st gear merges on expressways. Edited by 304-dude - Apr/17/2021 at 5:13pm |
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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Sonic Silver
Supporter of TheAMCForum Joined: Nov/23/2011 Location: East Tennessee Status: Offline Points: 7950 |
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I think many people have been confused by 2 totally different intakes with such similar names. They were called Offenhauser Equaflow 360, and Offenhauser Dual Port 360. They were both legitimate 360 degree single plane manifolds with 2 different purposes. I don't believe that Offy made an actual dual plane 180 degree intake. A lot of people confused dual port with dual plane, and still do.
By the way, I have an Equaflow 360 divided single plane, and have always wondered if putting a 4 hole spacer on it wouldn't be the thing to do. It would raise the carb up a bit which might keep the incoming charge from crashing into the intake floor because the plenum isn't too deep. Also, I thought it would help if the floor had some ridges or roughness of some sort. It isn't on the car now, so that may be for a later date. Thanks.
Edited by Sonic Silver - Apr/17/2021 at 6:05pm |
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