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Scat Crankshafts is reaching out to the many hardcore Jeep enthusiasts who have yet to accept the new V6 engine in the Wrangler, preferring to stay with the venerable inline-6. The company’s new rotating assembly kit offers 3.905-inch-bore pistons, 6.125-inch 4340 Pro Comp I-beam connecting rods and a 3.895-inch-stroke Pro Comp crankshaft.
“It comes as a fully balanced rotating assembly with bearings,” says Scat owner Tom Lieb.
With 60cc combustion chambers, pistons can be ordered for either a 10.7:1 or 9.6:1 compression ratio. Applications include 1987-2002 Jeep 4.2-liter I6 engines, resulting in a final displacement of 4.6-liter.
Another new rotating kit from Scat is designed to work with the Dart LS Next block and includes a 4340 forged standard-weight crankshaft with 58-tooth reluctor, Pro Sport H-beam connecting rods with 7/16-inch cap screw, premium forged pistons, piston rings and bearings.
On the left is the Scat rotating assembly for the LS Next block, and on the right is a rotating assembly for the Jeep inline-6 engine.
The cranks are available with 4.000-, 4.125- or 4.250-inch strokes, and bore sizes range from 3.810 up to 4.155, resulting in displacement possibilities from 365ci up to 461ci.
One of the more esoteric offerings at the Scat SEMA booth was crank line for the antique Ford Model A/B/C/T vehicles. This is a forged 4340 4-cylinder crank available in 4.000-, 4.250- and 4.500-inch strokes.
“There are still 200,000 of those engines out there,” says Lieb, “and those have 100-year-old cranks.”
Cranks and rods for antique engines are also available from Scat.
Finally, Scat showed off a new big-block Chevy crank with center counterweights and a 2-piece rear seal. They’re available in strokes of 4.250-, 4.375-, 4.500- and 4.750-inch, and all come wiht 2.200-inch rod journals. Complete rotating assemblies with the new center counterweight cranks are also available.
“Lot of boat owners want a center counterweight due to the long hours of running at wide-open throttle,” adds Lieb.
