Re: Offenhauser intake manifolds
Posted: Thu Jun 10, 2021 1:59 pm
I have the same intake that I was going to sell, you just made me change my mind with that picture to keep it. That is fricken cool, I love it.
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I have the same intake that I was going to sell, you just made me change my mind with that picture to keep it. That is fricken cool, I love it.
That Super Sonic manifold doesn't look too far off an Edelbrock 2970 IMO, and I wouldn't be afraid to try one for the cool factor of having an Offenhauser manifold under the hood.Walter R. Malik wrote: ↑Wed Jun 09, 2021 4:10 pm I am gonna make a guess here that none of you have ever built and ran a carbureted small block Mopar Super Stock engine with a modified Port-O-Sonic.
For Dominator proponents; the small block Chevy "Super-Sonic" was a pretty good manifold, too.
Their "Turbo-Thrust" tunnel rams work well, also.
Not many STREET manifolds, though.
No offense to 1980RS but that is the problem with a lot of stuff, looks > actual performance and it spills into the aftermarket. Also why I've seen many many tunnel rams and slightly used giant race cams for cheap, prob came off a street car. Don't get me wrong I wanna try a tunnel ram someday for a street car with carbs not efi, think I could make one work good enough with my tuning skills these days.
People can say what they want about some of the big buck intakes being the best, that's why we test them and some of the old stuff will surprise you. Years ago I bought a Dart oval port intake for my BBC and all the reports was the it was the intake to run and made the most power at the time, well it was a big old DUD used it a couple of years ago, still was a DUD. My RPM intake was still quicker and faster than the Dart. $400 still sitting on the shelf as eye candy.BOOT wrote: ↑Fri Jun 11, 2021 2:24 amNo offense to 1980RS but that is the problem with a lot of stuff, looks > actual performance and it spills into the aftermarket. Also why I've seen many many tunnel rams and slightly used giant race cams for cheap, prob came off a street car. Don't get me wrong I wanna try a tunnel ram someday for a street car with carbs not efi, think I could make one work good enough with my tuning skills these days.
A magazine did two big 20+ test of dual planes and single planes, not a very big diff and I sure if all intakes were cleaned up it would tighten up more. I mean if your looking for that last bit then honesty you really gotta test a few yourself cause I'm sure you could test 20 of the same exact intake out of the boxes and find a range of 5-15hp.
Heck I've herd bout a guy who gutted a blower and just ran it as an intake, still guess if that's what made him happy.
It's hard to give an opinion on your combo w/o lots of details but again it's been proven many many times that people will buy RACE single planes for street cars when they should get a dual plane. I have a few brand new single planes waiting for a certain project to test and see what one works better for me. They will sit in their boxes until then and I will keep using dual planes on my street cars.1980RS wrote: ↑Sat Jun 12, 2021 1:37 am People can say what they want about some of the big buck intakes being the best, that's why we test them and some of the old stuff will surprise you. Years ago I bought a Dart oval port intake for my BBC and all the reports was the it was the intake to run and made the most power at the time, well it was a big old DUD used it a couple of years ago, still was a DUD. My RPM intake was still quicker and faster than the Dart. $400 still sitting on the shelf as eye candy.
If you believe that theory on the single vs dual plane intake than you might be giving up power some place. Here is an example for you.BOOT wrote: ↑Sat Jun 12, 2021 11:58 amIt's hard to give an opinion on your combo w/o lots of details but again it's been proven many many times that people will buy RACE single planes for street cars when they should get a dual plane. I have a few brand new single planes waiting for a certain project to test and see what one works better for me. They will sit in their boxes until then and I will keep using dual planes on my street cars.1980RS wrote: ↑Sat Jun 12, 2021 1:37 am People can say what they want about some of the big buck intakes being the best, that's why we test them and some of the old stuff will surprise you. Years ago I bought a Dart oval port intake for my BBC and all the reports was the it was the intake to run and made the most power at the time, well it was a big old DUD used it a couple of years ago, still was a DUD. My RPM intake was still quicker and faster than the Dart. $400 still sitting on the shelf as eye candy.
Of course some use a single plane NP on the street but they didn't just plop it on some random slapped together combo in a stock car.
What was the stall with the single plane, also what was the shift point/max rpm. Sounds like you proved your combo better suits a dual plane.1980RS wrote: ↑Sat Jun 12, 2021 12:30 pm If you believe that theory on the single vs dual plane intake than you might be giving up power some place. Here is an example for you.
Last year I did a back to back single vs dual plane test.
Single plane result 11.29@116mph
Dual Plane result 11.26@117 and change mph. Everything else was the same on the car.
Both combos were optimized so it was a wash IMO.
Stall was the same with both intakes, 48-5200rpm. Both intakes were within hundredths of each other so all it proves it that there is not much difference. With a cam switch and the Air Gap on a hot day the same combo went 11.16@118.26mph, have not tried the Single plane though. The Holley Strip Dominator 300-4 is one of the best intakes I have used, the Dart with a 750 QF the fall prior only mustered at 11.75@114.5mph all else the same on the car.BOOT wrote: ↑Sat Jun 12, 2021 12:55 pmWhat was the stall with the single plane, also what was the shift point/max rpm. Sounds like you proved your combo better suits a dual plane.1980RS wrote: ↑Sat Jun 12, 2021 12:30 pm If you believe that theory on the single vs dual plane intake than you might be giving up power some place. Here is an example for you.
Last year I did a back to back single vs dual plane test.
Single plane result 11.29@116mph
Dual Plane result 11.26@117 and change mph. Everything else was the same on the car.
Both combos were optimized so it was a wash IMO.