Chevy's Greatest Small-Block V8 Just Got Even Better

Tuning / Comments

The LS7, which debuted in the Corvette C6 Z06, is now available as a 570-hp crate motor.

It's tough making big power from a naturally aspirated pushrod engine.

That's not to say that it can't be done, of course; to this day, NASCAR engines all follow a cam-in-block, V8 configuration, and they generate plenty of thrust. But horsepower is a function of both torque and rotational speed - the faster the engine spins, generally speaking, the more power it makes - and pushrod valvetrains don't like to spin like overhead-cam ones do.

That's what makes the big, burly 7.0L Chevy LS7 such a big deal. With a relatively high 7,000-rpm redline, the LS7 was rated at 505 peak horsepower in the Chevrolet Corvette C6 Z06 and fifth-gen Camaro Z/28, making it remarkably power-dense for its time. In terms of outright grunt, it's still more potent than the C8's LT2 V8.

Chevrolet Performance

But Chevrolet has since utterly outdone itself, revamping the LS7 with a simpler wet-sump lubrication system and a high-lift camshaft. That latter modification contributes to a whopping 65-horsepower increase at peak, for a total output of 570 horsepower - better than 80 horsepower per liter. The result - what Chevrolet has dubbed the "LS427/570" after its cubic-inch displacement and horsepower rating - is now on sale as a crate motor through the Chevrolet Performance catalog.

"The all-new LS427/570 builds on the legendary, racing-bred performance of the LS7 to create the most powerful naturally-aspirated LS crate engine in our portfolio," says GM's Specialist Marketing Group Manager, Jessica Earl.

10 Facts Everyone Should Know About BMW
10 Facts Everyone Should Know About BMW
8 Legendary Land Rovers
8 Legendary Land Rovers

While the LS427/570's new high-lift hydraulic roller camshaft is, indisputably, its party piece, the high-performance crate motor features a number of other highlights. Those include unique high-rate valve springs, a dependable rotating assembly with a forged steel crankshaft and titanium connecting rods, and CNC-ported cylinder heads with big, 2.2-inch titanium intake valves and 1.6-inch sodium-filled exhaust valves.

We don't yet know pricing on the new motor, but considering the original LS7 crate motor sells for around $11,000 at some retailers, we can safely assume it will start north of ten grand. Get your checkbook ready.

Front View Driving Chevrolet
Front Angle View Chevrolet
Rear Angle View Chevrolet

Join The Discussion


Front Angle View
Rear Angle View
Front View Driving
To Top