Chevrolet Performance LS7 7.0L Long Block

Chevrolet Performance LS7 7.0L Long Block

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In the annals of high performance engines, Chevrolet Performance LS7 7.0L long block crate engines will be remembered as a benchmark in naturally aspirated power, with 505 hp and 470 lbs.-ft. of torque. Within their classic 427 cu. in. displacement, engineers extracted big block grunt from their high-revving small block package. They feature a unique, big-bore cylinder block that's anchored with a forged crankshaft, featherweight titanium connecting rods, and friction-coated pistons.

But it's the airflow capability of the cavernous, CNC-ported heads that enables this tremendous amount of power. Large-volume, straight-passage intake runners channel air directly through 2.20 in. titanium intake valves. These packages include a production-style engine with the dry sump oil pan. You'll need to furnish the external oil supply and oil lines to the engine, but the rest is fully dressed—including the manifold assembly with injectors and electronically controlled throttle body, and log-style exhaust manifolds. Chevy Performance recommends their LS7 controller kit to get your new LS7 up and running in your project vehicle.

Technical specifications:

* LS-Series small block V8
* 4.125 in. bore x 4.000 in. stroke
* Cast aluminum block with 6-bolt steel main bearing caps
* Forged steel crankshaft
* Forged titanium connecting rods
* Hypereutectic aluminum pistons
* Hydraulic roller camshaft
* 0.591 in. intake lift and 0.591 in. exhaust lift
* 211 degrees intake and 230 degrees exhaust duration @ 0.050 in.
* CNC-ported cylinder heads with LS7-style ports and 70cc CNC combustion chambers
* 2.200 in. titanium intake and 1.610 in. sodium-filled exhaust valves
* 11.0:1 compression ratio
* Investment cast roller trunnion rocker arms
* 1.8:1 rocker arm ratio (offset intake only)
* 91 octane fuel recommended
* 7,000 rpm maximum
* 14 in., 168-tooth flywheel
* 58X reluctor wheel
* Internally balanced