Description:
This short block is available in either an RHS or Dart aluminum block and is intended for naturally aspirated, pump gas applications. It is the foundation of our 800 horsepower, naturally-aspirated, pump gas build. This beast can drive to the track and tear it up when it gets there without breaking a sweat as you'll see in the video below.
An aluminum block transfers heat better than its iron counterpart and weighs 100 lbs. less. Weight reduction is a big deal for a variety of reasons. As Newton figured out, Force = Mass x Acceleration. The same force will accelerate (or decelerate) a lesser mass faster. Taking 100 lbs out of the nose also shifts the center of gravity down and to the rear which greatly improves steering, braking and rear wheel traction.
In our experience, OE aluminum blocks don't hold up well in this power range. We use both RHS and Dart blocks depending upon customer preference and availability. Both bring a six-bolt head bolt design and the strength to easily handle this power level.
We finish-machine the blocks to perfection on our 4-axis CNC mill and CNC diamond hone. This last machining step is critical as it sets the cylinder bores' final dimensions and surface finish. Old-school manual hones can't come anywhere close to the precision and quality of our machining as you can see in the second video down below.
The rotating assembly starts with a Callies Compstar center counterweighted crank. The extra counterweights increase stiffness by 25% and reduce harmonics. This in turn enhances longevity and virtually eliminates uneven bearing wear. The forged Callies Compstar Extreme I-beam rods and Diamond Race Series pistons complete a short block that you won't need to worry about. The pistons will accommodate either LS3 or LS7 design heads. Check out the last video below to learn more about why we like center counter-weighted cranks so much.
Have different requirements? We offer a range of aluminum LS short blocks options to suit every need from endurance road racing to airboats to drag racing and from NA to 70 psi boost. You can also order these built out to long blocks or complete engines. Call us at 815-727-2727. In the meanwhile, check out this beauty now powering an LS-swapped BMW in Switzerland.
BUILT BY PEOPLE WHO LOVE MOTORSPORTS FOR PEOPLE WHO LOVE MOTORSPORTS.
Accepted methods of payment: Cash, certified check, money order, wire transfer
