SPA 2.5 Long Block

K24 block 

HD Solid deck sleeves 
K24 crankshaft (serviced, balanced, polished, washed) 
Hot tanked 
Ultrasonic cleaned 
CNC decked 
CNC bored 
Diamond honed with torque plate 
O-ring 
Aries HD piston kit with ultra duty wrist pins 
Speed factory rods or Manley Rods 
King bearing set 
Oil pump chain 
Oil pump chain guide 
Oil pump chain tensioner 
Baffle plate 
Modified F20C oil pump or HD Ported Type S
Blue printed 
Assembled 
Arp L19 head stud kit 
Cometic Gasket 
K20z3 or K24a2 CNC ported cylinder head 
Brian Crower valve set 
Brian Crower spring kit 
Brian Crower retainers 
Brian Crower locks 
Supertech stem seals 
Brian Crower valve guides 
Install guides 
Hone valve guides 
HD comp valve job 
Surface deck 
Brian Crower Cams 
Inline Pro timing chain tensioner 
Timing chain  
Long block assembly 
50* cam gear

ONLY WITH CUSTOMER SUPPLIED BLOCK & CRANK

ADD HD DUCTILE IRON SLEEVES FOR $899

Race Engine Break-In Procedure

ALL ENGINES NEED A BREAK IN TUNE

50 weight break in oil

Proper engine break-in is critical to ensure maximum ring seal, bearing life, and overall engine performance. Every fresh engine should be broken in correctly before being subjected to full race conditions.

Before initial startup, verify all fluid levels, fuel pressure, and electrical connections. The oiling system should be primed prior to firing the engine to establish oil pressure and ensure all internal components are properly lubricated. To prime the oiling system, disable fuel and ignition and crank the engine over until oil pressure is established and visible on the gauge. 

On first startup, the engine should immediately be brought to 1800–2500 RPM (not higher AND DO NOT THROTTLE JUMP) and held there for approximately 15–20 minutes while varying engine speed slightly. Avoid prolonged idling during this process. This initial heat cycle allows proper oil distribution, component stabilization, and confirms system operation. During this time, closely monitor oil pressure, coolant temperature, air/fuel ratio, and inspect for any leaks or abnormal noises.

After the first heat cycle, allow the engine to cool completely and recheck all fluid levels, fittings, and general engine condition. 

The next phase is the ring seating process. This is performed under load by driving the vehicle and making 8–12 controlled acceleration pulls. Start at approximately 2,500 RPM and apply 50–70% throttle up to 4500-5500 RPM without Vtech, then completely lift off the throttle and allow the engine to decelerate in gear. This process creates cylinder pressure to properly seat the piston rings while engine braking helps remove excess debris from the cylinder walls.

Avoid excessive idling, constant RPM cruising, lugging the engine, or extended full-throttle operation during this phase.

After approximately 30 miles or the first race session, the engine oil and filter should be changed and inspected for any contamination or abnormal metal debris.

For the next 100 miles, continue operating the engine under varied load and RPM conditions while gradually increasing throttle input. Short full-throttle bursts may be introduced, but prolonged high-RPM (above 5500 rpm) operation should still be avoided until break-in is complete.

Following this procedure helps maximize compression, improve ring seal, reduce blow-by, and extend the life of your race engine.