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I was so curious about the intake, I called Wilson Manifolds mentioned in the article.
They can fully flow port that manifold, for $1450, and it still fits under the stock BB hood!
The port job is worth 30HP on the top end, and TQ everywhere.
But no reference was made as to how much an even bigger intake would help
It's very cool to get the stock look. But it's definitely strangling it......but to get to where they are it probably took a lot of intake carving. Years ago I tested an untouched ancient Edelbrock C454 dual plane for a Dominator carb on an 11.0 compression 555" with Dart 335 cc heads. I tested a lot of intakes, carbs and cams over a 3 day dyno session. One intake was a Wilson ported Vic Jr with all the tricks (mega $$$- $2400 back then- and I provided the intake) using a Holley HP 1000 4150 carb. Run against the C454 and Dominator..there was only a 19 HP difference on the top end. With the huge port mismatch...I know a couple hours of grinder work on it would have matched or beat the high $$$ single plane and it also fit under the hood a lot better.
This version of the engine with a solid flat tappet cam was making 740'ish HP with the dual plane and about 760 with the single plane.. A comparable Hyd roller made 760 also. When I added a Super Victor intake with the Dominator...the solid flat tappet cam made 810 HP. and the Hyd roller made about 800. A nice solid roller made 850 HP.
A 582 is a lot of cubes to feed....but I bet it's got incredible throttle response and would be great with a set of 2.73 or 3.08 gears and a T-400 trens.
Good power but do the math and it is 1.3 hp per cube......which is a hot 455hp 350 Chevrolet street engine comparably.......not barnstormer type stuff.......
The LS6 intake has huge runners and mini plenum in the center.......it is a great design for low profile but depending on what cam is in this thing, it would probably make another 30-40 horsepower with the old Dart intake.....
It would be a rip of a street engine though......dump truck power all the way to 6000rpm.......they have soooo much swept volume combined with a huge bore and massive valves.....VE is very high on these...torque is too easy......even when you cam these things to make 900hp they still make like 680 ft/lbs. torque.......
Another thing about these big engines is everything is strong as **** so a 250-400 nitrous shot is almost nothing for it........an 1100 hp engine at the touch of a button and enough power otherwise to make you giggle like a school girl.....but my choice of car for this would be a 66' Chevelle......
Last edited by Jebbysan; Sep 29, 2023 at 07:38 AM.
Exactly Jebby!
A comparable sized engine at my buddy's drag race shop punches out 950-1000HP.
This is a street friendly camm'd engine that you do not have to rev past 6000rpm!!! And 750HP to boot!!! (Those big camm'd drag motors spin up to the mid 8000 range to get that power).
I will bet this thing drives as nicely as an LT-1. You know just more of it.... a lot more.
I'll bet it makes good power from 1500/2000 & up.
The TQ & HP peak numbers are at almost exactly the same rpm as an LT-1. 4800 & 6000.
So how to compare the cams? "This one has a 661/.661-inch lift and 251/259 degrees of duration at .050-inch lift. To create a broad torque curve, a 114-degree lobe separation was used on the core. It is a Hydraulic Roller."
The huge cubes make the 251 duration street friendly. Since the LT-1 cam is a solid cam it is hard to compare. But SWDuke measured an actual NOS LT-1 cam, and measured it at modern specs, and got 229/237 @ .050 duration, above the lash ramps, treating it like a hydraulic, on a wide 114-116 LC. Those specs let you can compare it directly to a hydraulic. So the extra 40% cubes of the 582 just swallows the extra 21 degrees of duration up, and it acts the same, and peaks at the same rpm. The 251 duration spec might look like it is almost as big as an L88 cam (264) or a SBC "140" off road cam (257), but those cams peak closer to 7000. The modern fast lobe Ramps, wide LC, and huge cubes tame this one right down and make it street friendly! It is most definately not "maxed out". Lorenzo has dyno'd 100% correct L-78 (396) and L-72 (427) engines and they make peak HP at 500 different rpms just because of the cubic inches. Virtually every other component in those 2 engines are exactly the same. The 396 peaks at 6800, and the 427 peaks at 6300, and they both make 460HP, as they should, because they have the exact same cam and heads. It just takes the little 396 more rpm to move exactly the same airflow thru the heads. The cubes just "tame" the cam down. And that is only a 31 cube difference. And this 582 has 40% more cubes! It's even 26% bigger than a 427. (another 155 cubes)
I like to envision this 582 as a 750HP good revving, street manner friendly LT-1, and it hides under a stock hood and looks stock for the "stealth" look.
My kind of engine!
I say drive it 1200 miles one way across the country & let us know how it does.
at least it's all aluminum, probably knock down a good 24-26 mpg since it's a corvette motor.
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.
It might look stock...but....
