Mazworx SR20VE FWD Long Block Stage 3.5 NA

The Mazworx SR20VE FWD Long Block Stage 3.5 NA is a meticulously engineered racing engine built for Nissan B13 and B14 chassis. Designed to deliver robust naturally aspirated performance, this long block combines precision machining, premium components, and expert assembly to ensure durability and responsiveness on the track.

Engine Build Details

This Stage 3.5 long block is centered around a 2.4-liter (92mm x 92mm) displacement optimized for drag racing and high-performance naturally aspirated applications.

Short Block Assembly

• Complete disassembly and thorough cleaning of the short block, including hot tanking and sandblasting.
• Installation of Darton Dry Sleeves after careful machining and honing with torque plate usage.
• Step decking of the block and precise line bore resizing ensure optimal component fitment.
• Crankshaft is meticulously cleaned, checked, polished, and balanced.
• Custom forged CP lightweight pistons (92mm, 14.5:1 compression ratio) are paired with longer R&R aluminum rods.
• ACL race bearings, Mazworx main stud kit, and specialized freeze plugs with threaded and O-ringed designs provide reliability under high stress.
• Additional enhancements include a Mazworx front oil squirter and associated oil system upgrades.

Stage 3 Cylinder Head Features

• Complete disassembly and cleaning, including hot tanking.
• Removal and replacement of oil port and freeze plugs with threaded, O-ringed inserts for enhanced sealing.
• Stage 3 NA CNC porting and 92mm CNC combustion chamber machining increase airflow and efficiency.
• Valve guides are replaced or reamed to specification, with multi-angle valve job and precise valve lash setup.
• Mazworx shimless intake (37mm x 5.5mm) and exhaust valves (30mm x 5.5mm) are installed alongside Supertech titanium retainers and dual valve springs rated at 83lbs.
• Racing cams tailored for the SR20VE (184-EK profile, 274/262 duration) optimize valve timing for all-motor performance.

Long Block Assembly and Components

• Full assembly including timing chain kit, Mazworx timing chain tensioner, crank/cam sensor kit, and engine bolt kit specific to the SR20VE FWD.
• Mazworx/ATI SR20 FWD street damper includes a 36-2 trigger wheel for precise ignition timing.
• Valve cover receives powder coating and service, complemented by the P11 valve cover washer kit.
• Engine is sealed using a high-quality 92mm VET head gasket and necessary seals and gaskets.

Additional Information

This build requires a core SR20VE long block and offers options such as 60mm individual throttle bodies (ITBs) for further performance customization. The combination of premium parts and precise machining practices makes the Mazworx SR20VE FWD Long Block Stage 3.5 NA ideal for enthusiasts seeking a high-quality naturally aspirated Nissan racing engine.