Description:
If you are looking for a replacement short block for an engine with only a cam and head work, this could be a great choice for you. Our CNC machining and assembly paired with superior parts allows this short block to hit much higher levels of performance than new. Why? Better parts and essentially perfect dimensions, balance and surface finish. Check out our YouTube Engine Machining playlist for a deep dive.
In our opinion, a seasoned GM block that we have precision machined, engraved and serialized on our CNCs is a better foundation than a new GM block. It certainly offers more value. This short block benefits from our state-of-the-art CNC machining which provides a level of precision far beyond OE. All blocks are individually serialized on our 4-axis CNC for traceability. We install premium Dura-Bond cam bearings and replace the OE main bolts with P1 main studs.
The P1 studs are a major upgrade over the OE main bolts of unknown origin. P1 manufactures all these studs from E190 steel alloy in their new Rogersville Missouri plant. The torque on a stud is all applied in a single direction whereas a bolt also twists. Studs are not therefore susceptible to "unwinding" and provide greater clamping force.
Stock GM LS cranks are cast not forged. They are nevertheless, remarkably strong and more than adequate for naturally aspirated applications. We switch to forged, 8 counter-weighted cranks for strokers and power-adder applications.
The additional weak links on a stock shortblock are the powdered metal rods and cast pistons. This shortblock has a seasoned GM crank paired with forged Callies rods and Diamond pistons. The crank is polished on our lathe and computer balanced along with the rest of the new rotating assembly.
The naturally-aspirated, long block version of this short block does about 630 hp with our CNC-ported GM LS3 heads and more when switching to aftermarket heads (see video).
We use either Diamond Race Series pistons or Manley Extreme Duty Platinum Series LS Pistons (flat tops) together with either Callies or Manley rods to complete the rotating assembly. The forged H-beam rods are made with 4340 alloy. The pistons are made from 2168 alloy with wrist pins of 9310 alloy.
These are quick-ship items. We usually have one either fully assembled, or have fully machined parts ready to assemble. Call us at 815-725-2727 with any questions or click the BUY NOW link for more information or to place your order.
Note: Manley & Diamond pistons are used interchangeably based on availability and customer preference as are the Manley & Compstar rods.
Built by people who love motorsports by people who love motorsports.
Payment Type Accepted: Cash, ACH wire transfer
4-Axis CNC Block Machining
CNC Honing
