Small block Chevys were designed to be high revving. Light weight and a short stroke/large bore design let that first 265 cubic inch engine make good power up to about 5000-5500rpm, unheard of in 1955 when flathead Ford V8s ran out of steam at three grand or so.

Today you can build a small block Chevy to make power well beyond 7000rpm with the right parts. One of the secrets to a high-RPM small block is reducing rotating assembly weight. A lightweight assembly can spin faster, so the engine can hit its powerband quicker. It also takes less horsepower to rotate, so you gain back some extra power.

A lightweight rotating assembly also improves the car’s acceleration and deceleration. That last point is a big plus in circle track racing as faster deceleration in the turns means you don’t need to hammer on the brakes as hard.

A good place to start your rotating assembly’s diet is with a Scat Excalibur Lightweight Crankshaft. Forged from 4340 steel, an Excalibur crank weighs around 22kg depending on which one you choose. The cranks are precision-ground, heat-treated, and nitride-hardened for superior wear resistance.

Scat Excalibur Lightweight Crankshafts are available in these configurations:

• 3.480in stroke, 5.700in rod, 350 mains, internal balance
• 3.480in stroke, 5.700in rod, 350 mains, front internal/rear external balance
• 3.750in stroke, 5.700in rod, 350 mains, internal balance
• 3.750in stroke, 5.700in rod, 350 mains, front internal/rear external balance
• 3.750in stroke, 6.000in rod, 350 mains, internal balance
• 3.875in stroke, 6.000in rod, 350 mains, internal balance
• 4.000in stroke, 6.000in rod, 350 mains, internal balance
• 4.000in stroke, 6.000in rod, 400 mains, internal balance

SEE SCAT EXCALIBUR LIGHTWEIGHT CRANKSHAFTS AT SUMMIT RACING ENDS.