ive been offered this gm Aluminum intake 3933163 should i go with it or stay with my Wieand steath single plane aluminum intake also been offered a edelbrock performer dual plane
numbers say 68-69 BB 396 L78 /L89/427 Copo
what would it be worth paying for it , i think i can get it at a fair price, would it help my HP any? or is it just a #s thing
-- Edited by 68sd on Friday 28th of January 2011 12:15:32 AM
Dual Plane is designed for better low end torque and performance as well as mid range torque. They provide better driveability and fuel consumption. I think it depends on what you are building the car for but knowing you I suspect that it will used as a nice cruiser/driver in the situations described above. On top of that that is one cool OEM part. I'd go with the dual plane pictured.
ive been offered this gm Aluminum intake 3933163 should i go with it or stay with my Wieand steath single plane aluminum intake also been offered a edelbrock performer dual plane
numbers say 68-69 BB 396 L78 /L89/427 Copo
what would it be worth paying for it , i think i can get it at a fair price, would it help my HP any? or is it just a #s thing
-- Edited by 68sd on Friday 28th of January 2011 12:15:32 AM
The GM intake is for large, rectangular port heads. They will work fine on oval port engines if thats what you have as long as you use the large port gaskets. I think that's one of the best manifolds available, and it has the factory look that I really like.
You can see the difference in the height and open plenum in the two photos, height helps to increase torque as well. That OEM aluminum is a classic design. I can't put my hands on my Chevy Power manual but I'm certain the big block build includes a intake like that. They run a big Holley but I'd stick with the Quadrajet for all round driveability.
I have a few good Buick 430 - 455 Quadrajets. These Buick Q-jets flow up to 850 cfm which is more than pretty much all other Quadrajets. The only thing is the fuel inlet is straight and the cruise night lawyers would pick up on that and call you out on it. The trade off is you get the biggest Quadrajet going with the flow to go when you call on it.
US Pontiac guys go with the Buick carbs all the time because visually you can't tell the difference from a Poncho Q-Jet.
I have about 6 of these big Buick carbs so do some research and let me know.
I am no expert on this but I think the centre divider has been ground out on that aluminum intake and if I'm right that considerably reduces the dual plane effect. Someone here know more about that stuff than I do?
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
i sold a guy a edelbrock aluminum intake for a 400 pontiac for 50 buck earlier in the year, i had to buy it to get a olds 350 one for my father in law. both of these were like that notched in the middle?
so i guess i should be asking what is the best top end set up for power in a big block chev?
so far i can say my engine has been balanced bored has a aftermarket speedpro cam that i cant say what it is? double roller chain high volume oil pump and this wieand intake/edlebrock carb ,i think its a 650?
-- Edited by 68sd on Friday 28th of January 2011 12:56:12 AM
I am no expert on this but I think the centre divider has been ground out on that aluminum intake and if I'm right that considerably reduces the dual plane effect. Someone here know more about that stuff than I do?
It was the recomended modification back in the day.
You sure the intake you have is a single plane ? Weiand stealth intakes are dual planes. There advertising for that intake is get single plane power on your street strip machine plus low rpm drivability with a Stealth high rise dual plane intake. Works from 1500-6700 rpm.
That intake if its in great shape like Carl mentions, is worth easy 200 bucks and up. If you get it for less its a steal. Its a 396 375 hp or 427 425 hp or 454 450 hp intake and it works really well up to 5500 or so RPM , has good bottom end too as its a dual plane. As it looks a bit rough maybe offer 100 bucks and see ...and yes put a big square bore Holley on there if you wanna make horsepower
-- Edited by Elroy on Friday 28th of January 2011 01:26:51 AM
The Weiand stealth is the counter to Edelbrock Performer RPM. The other Weiand is the Stealth AIr strike with isolated runners, there counter to Edelbrocks Air gap. Both are dual planes. I would just keep it.
Look at the runner pattern of the Stealth and the runner pattern of the GM Alum. stock, they look identical. Like Rabbit says, grind the name of it and will be hard to tell. Paint it chevy orange and realy make it stealthy.
-- Edited by Beaumont4008 on Friday 28th of January 2011 02:00:33 AM
