Mazworx Stage 3 Short Block (SR20 RWD)

The Mazworx Stage 3 Short Block for the Nissan SR20 (RWD) represents a significant upgrade over the Stage 2 version, featuring a robust 91mm stroker rotating assembly. Engineered for performance, this short block is rated to support up to 800 horsepower, making it a solid foundation for high-power SR20 builds.

Detailed Build Process

The assembly begins with thorough labor procedures designed to ensure precision and durability:

• Complete disassembly and hot tank cleaning of the core short block.
• Sandblasting the block for surface preparation.
• Removal, retapping, and replacement of oil port plugs.
• Machining for threaded freeze plugs and plugging the RWD oil drain.
• Machining the block for 1/2″ studs, installing Darton sleeves, and resizing cylinders using a torque plate for accuracy.
• Step decking and line boring to exact specifications.
• Oil groove machining specific to the SR20 platform and machining for 19mm rod bearings.
• Crankshaft cleaning, checking, polishing, and balancing.
• Final assembly of the short block with all performance parts.

High-Quality Components

The Stage 3 Short Block incorporates premium parts chosen for strength and reliability under high-performance conditions:

• CP Pistons at 90mm with a 9:1 compression ratio (adjustable as needed) and upgraded wrist pins with a .200″ wall.
• BC ProH625+ connecting rods for enhanced durability.
• Mazworx billet 91mm stroker crankshaft engineered for strength.
• Darton sleeved cylinders for improved cylinder integrity.
• Calico coated ACL race bearings to withstand high stress.
• SR20VE oil pump for optimized lubrication.
• Mazworx billet main caps and girdle for increased block rigidity.
• Mazworx main stud kit and threaded, O-ringed freeze plug kit for reliability and sealing.
• Mazworx front oil squirter designed specifically for the SR20 block.
• Billet breather adapter and various plugs to complete the assembly.

Customer Requirements

Note:  The core block must be supplied by the customer to facilitate the build process.

With meticulous machining and high-grade components, the Mazworx Stage 3 Short Block for the SR20 RWD chassis is engineered to deliver exceptional strength and performance up to 800hp, providing a reliable foundation for your next engine build project.