Dual Quad Manifold
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Joined: Oct 2012
Posts: 1,558
From: central massachusetts
Old(s) Fart
Joined: Mar 2007
Posts: 50,799
From: Northern VA
There have only been three dual quad intakes ever made commercially for the big block Olds motor, not counting tunnel rams. My personal preference is the Edelbrock, which unfortunately has been out of production for decades. They show up regularly on ebay. The E-brock is a dual plane intake and works really well on the street.
Offy makes two different ones, the 360 and 180. The 360 is a very flat single plane intake with no contouring of the runners at all. They are best used as the basis for a supercharger manifold - BDS mills the carb flanges flat and welds on an aluminum plate to mount the blower. The 180 is possibly the goofiest intake ever conceived. It is basically the 360 casting with a vertical wall running down the middle of the plenum. The RH side of the carbs feed the RH cylinders and the LH side feed the LH cylinders. This runs counter to conventional dual plane manifold design where each side of the carb feeds alternating cylinders in the firing order. It should tell you something that in half a century, no other manufacturer has ever produced a manifold like that.
Offy makes two different ones, the 360 and 180. The 360 is a very flat single plane intake with no contouring of the runners at all. They are best used as the basis for a supercharger manifold - BDS mills the carb flanges flat and welds on an aluminum plate to mount the blower. The 180 is possibly the goofiest intake ever conceived. It is basically the 360 casting with a vertical wall running down the middle of the plenum. The RH side of the carbs feed the RH cylinders and the LH side feed the LH cylinders. This runs counter to conventional dual plane manifold design where each side of the carb feeds alternating cylinders in the firing order. It should tell you something that in half a century, no other manufacturer has ever produced a manifold like that.
Registered User
Joined: Oct 2017
Posts: 82
From: Connecticut
I have a Edelbrock O65 up for grabs - Dual plane dual quad manifold only, as Joe describes above. In good shape but has been glass beaded in the past. $425 plus safe shipping from Ohio.
No heat riser burn through, no water jacket corrosion. Did not chase threads, but all look good. In storage for decades.
Located in northern Ohio.
coldsmobile aht geeee mell daht kahm
TU
No heat riser burn through, no water jacket corrosion. Did not chase threads, but all look good. In storage for decades.
Located in northern Ohio.
coldsmobile aht geeee mell daht kahm
TU
Mark
Original Owner- 4spd A/C
Joined: Jun 2009
Posts: 115
From: Yukon, Ok.
Registered User
Joined: Sep 2012
Posts: 1,413
From: Water Wonderland MI.
Curious if anyone knows what 065 stands for, have this same intake purchased with my ;65 August built 442 in '75. Intake was in the trunk and I always wondered if this was Olds preview for the tri power intake in '66.
Registered User
Joined: Oct 2017
Posts: 82
From: Connecticut
Registered User
Joined: Oct 2017
Posts: 82
From: Connecticut
http://victorylibrary.com/mopar/edel.htm
Old(s) Fart
Joined: Mar 2007
Posts: 50,799
From: Northern VA
It's just Edelbrock's designation and has nothing to do with Oldsmobile.
Old(s) Fart
Joined: Mar 2007
Posts: 50,799
From: Northern VA
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