1000 HP or Bust

[RAS]

Hello everyone. I've got a Question. It's well documented that there are many normally asperated LS engines in the 440 inch size that can make 1000 HP around 9000 rpm with 430 cfm heads and a cam with about 285 duration on the intake. Yes, this is not cheap but it's common enough. Has anyone ever heard of a big block at 440 inches that can make 1000 HP NA at any rpm using any type of cylinder head? I know BB engines are not built this small for obvious reasons but even at 540 inches making 1000 HP NA is still a huge reach for a BB. It is truly amazing that some LS heads can flow in the 450cfm range with 2.250 - 2.300 valve and a 4.185 bore. Piston speed in that 540 would be insane at 9000 rpm. $$$ Your thoughts...

[mt-engines]

A 540 can make that kind of power with shelf parts. And it doesn't need to spin 9k

Im sure you could make 1000hp out of a 440 big block.. But who would make one that small. And why.

[swampbuggy]

4.600 x 3.335 =443. 1 BIG dommy. massaged Eddy Big Victor 2. Reher Morrision Raptor 2 heads. Big cam core 55/60mm w/.937 lifter. 1" lift about 270 at .050. 114-116. LSA. Easy 1000 H.P. Mark H.

[prairiehotrodder]

That LS example is impressive, no denying that.

When you build a BBC you carry that weight penalty so you might as well build big cubes. No reason not to.

A traditional SBC can make big power as well i suppose if you are willing to spend the money.

[Little Mouse]

Not impressed with 1000 hp LS. I'd bet money that reher morison. Did 1000 hp in 81 with there 362 cubic inch BBC. As I recall Joe said he saw jenkins 331 sbc do 660 hp at edelbrock dyno in 1974.

[swampbuggy]

I am sure if you could build 2 HP per CI in 1974 you were a person looked up to. Mark H.

[swampbuggy]

1000 HP out of a 362 CI (naturally aspirated) engine in 1981 ?? Lets see here, 1000 divided by 362 = 2.76 HP per CI in 1981......ain't no way bud. Maybe you meant 462 CI ??? 2.16. per. CI. and that would STILL be D@M# impressive in 1981. Mark H.

[bob460]

This ain't bad for a pump gas NA build........BUT 488ci......

[midnightbluS10]

Bob Book and others are coaxing over 1000hp out of 400ci LS engines. So even smaller than the 440 claimed in the first post.

What would it take to get that from a Mopar 383 'big block' bored/stroked to 400? Quite a bit, I'd bet.

[midnightbluS10]

Not impressed with 1000 hp LS. I'd bet money that reher morison. Did 1000 hp in 81 with there 362 cubic inch BBC. As I recall Joe said he saw jenkins 331 sbc do 660 hp at edelbrock dyno in 1974.

What times were they running that year? Wouldn't be hard to do the math and figure it out.

Edit: they ran 8.41 at the Winston World Finals that year, where Lee was crowned World Champion for the season. At an avg of even 2400 lbs, 1000hp at the flywheel would be something like 8.20s according to the calculators I checked.

[ptuomov]

What fuel?

[Ron E]

I have a good friend with a (at the time) IHRA production S/S 468" with spread port heads single carb , a cast Dart intake (better versions available now) that made 1003 HP at 7900 RPM. Heads flow 480 on a 4.31 bore, 520 on a 4.5 bore (both at .900" lift.) Car ran 5.44 1/8th at 3600 lbs.

[RAS]

A pump is a pump right? Horsepower is just a number derived from torque and rpm. The fact that an LS engine can consume enough fuel and air to make 1000HP @ 440 inches is hard to comprehend. Big Blocks struggle making this HP with 100+ more cubic inches. This is with off the shelf parts now, not some one of a kind deal. Dan Jesel has his Equal 8 at 427 inches that has 1300 HP in it's sights. But the rpm is almost 12000. Anything is possible but when common people can build that LS with store bought parts that can make 1000 HP that's just today's technology bragging and laughing at all of us. I love it. Can't wait until LS fest.

[mt-engines]

I have a good friend with a (at the time) IHRA production S/S 468" with spread port heads single carb , a cast Dart intake (better versions available now) that made 1003 HP at 7900 RPM. Heads flow 480 on a 4.31 bore, 520 on a 4.5 bore (both at .900" lift.) Car ran 5.44 1/8th at 3600 lbs.

My old neighbor ran prostock in those days.. He laughed and said nothing close to 1000hp. He said 8300 was where he made peak power and he shifted around 8600. Also said he had to run a mechanical tach because of the plug wires interfering with his tachs lol. He showed me some of the custom machined parts he made while working for Northwest Airlines as a machinist. It's also amazing a machinist for an airline company had enough money then to race at a pro level.

[Ron E]

The engine I'm talking about is still in service. Built around 2008-2010. The rules are similar to NHRA's modified stock classes without the spec carb. It has the benefit of current materials and designs. Of course, these parts are built on the backs of people like your neighbor. They found what needed updating...the hard way.