Description:

At Borowski Race Engines, we like to use fully counterweighted crankshafts in our engine builds. We believe the additional cost of 8 versus 6 counterweights is more than offset by the value delivered in engine longevity and performance. This design increases the stiffness of the crankshaft and reduces harmonics. The direct result is reduced flexing of the crank. The indirect results are greatly improved bearing life and a much stronger bottom end, particularly with a GM LS block.

Callies offers these center counterweighted cranks in their Compstar, Magnum and Ultra Billet lines for LS engines.  We use the Compstars for naturally aspirated builds and light boost before trading up to the Magnums at more than twice the price for heavier boost and higher horsepower. 

We really like how they work to stabilize the bottom ends of stock GM blocks.  We typically use the stock stroke with boost and the 4.000" stroke on naturally aspirated builds like the one in the video.

We got Callies' Brook Piper to tell their story while at Lights Out 2021 at South Georgia Motor Sports Park.  Watch the video below to learn more.

Give us a call at 815-725-2727 if you need anything from one of these cranks to a complete engine build.

 LS1 GM Small Block

• Stroke offered in 3.625", 4.000"
• Rod Length: 6.125"
• Pins: 2.100
• Bob weight: 1900
• Reluctors: 24, 58

Bonus video - Callies Plant Tour video clip