Flat-Plane Crankshaft

SCAT Crankshafts was highlighted in Street Muscle Magazine regarding SCAT’s flat-plane crankshafts.


 

Street Muscle Magazine writer Bobby Kimbrough shared this insight:

“We can make flat-plane crankshafts for anyone,” says Leib. “We’ve been making flat-plane cranks for years. To us, it’s nothing new.”

 

In fact, Leib explained, “Cadillac first used the flat-plane crank in 1915.” According to Leib, most people don’t understand what a flat-plane crank is all about. “The header guys talk about this all the time. On a standard V8 engine, it is impossible to have tuned headers with equal-length pipes because of the firing order,” he explained. “It fires, then at 90 degrees, then 180, 270, then 180 back to number one. So what happens is, the one with the short pipe gets there too soon and the one with the long pipe gets there too late. So there is never that rotation of equal pulses into the collector so you can use the exhaust for scavenging and jump-starting the intake.”

 

While it may sound inventive and complicated, it is actually a simple design. “In a common V8 cross-plane crank, you would start with the number one pin, pin two at 90-degrees, pin three at 180-degrees, and pin four would be at 270-degrees to the number one pin. This spaces everything equally around the centerline of the crankshaft,” says Leib. “A flat-plane crank is equally spaced around the centerline as well, but at 180-degree spacing instead of 90-degrees.”

 

Read the full article on Street Muscle Magazine’s website.

About SCAT Enterprises

SCAT was founded in 1964 by Tom Lieb, who ran a parts business out of his parents’ garage while still in college. Over 50 years later, SCAT Enterprises offers a wide range of products under the SCAT Crankshafts and Procar by SCAT brands. In addition to a comprehensive line of crankshaft options, the brand offers high-quality connecting rods and rotating assemblies for a wide variety of applications, including Small and Big Block Chevy, Chevy LS, Small and Big Block Ford, Ford Modular, Vintage Ford, Small and Big Block Chrysler, Modern Hemi, Pontiac, Sport Compact, Motorcycle and Industrial. Additionally, SCAT Crankshafts can make a crankshaft from a raw billet to a finished crankshaft in its Redondo Beach, California, manufacturing facility.

Procar by SCAT, founded in 1980, offers stylish, comfortable aftermarket seats at an affordable price. Clean, classic lines are the hallmark of a Procar seat, which complements any auto – including street rod, cruiser, pony car, muscle car, off-road buggy, truck, or sport compact. Procar seats are easy to install with custom mounting brackets available for over 3,000 applications. The all-steel, TIG-welded frames are coated for ultimate strength and durability, while premium-grade fabrics and stitching will stand the test of time. Each Procar seat is built for style and most importantly, optimal comfort.

For more information visit www.scatcrankshafts.com/2022 and www.procarbyscat.com