[SOLD] Offenhauser dual plane small block intake (clean)
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twistthethro
twistthethrottle
a billon years ago I had a weiand single plane with a removable divider
twistthethro
twistthethrottle
wish I till had it but I was young and dumb
Avispa
Well-Known Member
Looks more like a cross hybrid Port-O-Sonic that's been modded.
Of course I was jesting, take a ton of work to make that intake outta a Port-O-Sonic. I had one and liked and agreed with the theory behind it, I thought it was a great street intake.
Of course I was jesting, take a ton of work to make that intake outta a Port-O-Sonic. I had one and liked and agreed with the theory behind it, I thought it was a great street intake.
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twistthethro
twistthethrottle
what is the model number on it?
This is a 360 degree intake manifold Period. Offenhauser never called them anything else. There are three variants. The one in this ad with the single plane floor. A similar one with a dual plane floor and the same body. The third was the 360 degree Dual Port. That last one was good for truck engines or mild street cars that needed bottom end torque not past about 5000 RPM.
The other two, the one in this ad and the one with the dual plane floor were meant as all out performance intakes geared for hood clearance. This intake in this ad is perhaps the best one. Look how short the runner dividers are. This makes the plenum BIG. That increases bottom end torque. This intake was advertised to have a power range of 1800-8800. With everything matched up, they won't quit pulling. Again, Offenhauser never called any of the three variants single plane. They called them simply 360 degree intakes because they were supposed to have the attributes of both. A true single plane intake has runner dividers from the start of the plenum all the way to the cylinder head ports. None of these ever did. They were in a class all by themselves as for design.
My apologies for the continued commentary, but it appears no one really knew what this was. It's a damn good intake at a damn good price. If I was even thinking about a small block build I would find a way to buy it. Somehow. lol
The other two, the one in this ad and the one with the dual plane floor were meant as all out performance intakes geared for hood clearance. This intake in this ad is perhaps the best one. Look how short the runner dividers are. This makes the plenum BIG. That increases bottom end torque. This intake was advertised to have a power range of 1800-8800. With everything matched up, they won't quit pulling. Again, Offenhauser never called any of the three variants single plane. They called them simply 360 degree intakes because they were supposed to have the attributes of both. A true single plane intake has runner dividers from the start of the plenum all the way to the cylinder head ports. None of these ever did. They were in a class all by themselves as for design.
My apologies for the continued commentary, but it appears no one really knew what this was. It's a damn good intake at a damn good price. If I was even thinking about a small block build I would find a way to buy it. Somehow. lol
In all my years I don’t remember seeing 1 of those. Although back then it was mostly Edelbrock. Some Weiand then the Offy’s. Then the Mopar listings come on strong. Kim
pishta
I know I'm right....
Offy 360 was names that because both banks could pull from the entire plenum, not a more common "180" design that pulled from one side of the (divided) carb. See all the intakes that were produced. WTH is a dial-a-flow?
http://tr4a.weebly.com/uploads/2/1/9/8/21980360/offenhauser_catalog_part1.pdf
http://tr4a.weebly.com/uploads/2/1/9/8/21980360/offenhauser_catalog_part1.pdf
The Dial A Flow had a HUGE plenum that had a "four leaf clover" that sat down in it. You could turn it and achieve different plenum shapes for different effects on how the engine ran.
Here is the Dial A Flow. Read about it. It's pretty cool. Does it work? I don't know, but it would make a cool as heck vintage wall hanger.
https://www.whiteowlspeed.com/produ...-273-318-dial-a-flow-manifold-reg-4-bbl-carb/
https://www.whiteowlspeed.com/produ...-273-318-dial-a-flow-manifold-reg-4-bbl-carb/
Read something here on it.
Intake Manifold Comments
Intake Manifold Comments
To the OP, dual plane=2 different levels at carb plenum. With or without divider.
I had an Offy "dual port" where each port had a divider weird looking thing...I never ran it.
Edit here's the "dualport 360" I had.
And a good conversation thread on it from Paul.(he knew his stuff)
Offenhauser Dual-Port 360* Intake ~ 'Was It A Gimmick'
I had an Offy "dual port" where each port had a divider weird looking thing...I never ran it.
Edit here's the "dualport 360" I had.
And a good conversation thread on it from Paul.(he knew his stuff)
Offenhauser Dual-Port 360* Intake ~ 'Was It A Gimmick'
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Yeah, that's the one that's good for bottom end. Kinda different but they worked.
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