Evolution X Stage 3 Race Spec Camshafts (by Brian Crower)
Brian Crower race-spec camshafts for the Mitsubishi Evolution X. Race-spec camshafts feature longer duration profiles and additional rpm potential. Intended for fully built engines. Tuning and ECU MODs are recommended.
The 4B11T was the first engine in the Lancer Evolution series to use a die-cast aluminum cylinder block, rather than the cast-iron block used in the turbocharged 4G63 engine found in all previous models. The engine weight was reduced by 26 lbs compared to the 4G63, despite the addition of a timing chain instead of a belt, and the addition of MIVEC continuous variable valve timing to both the intake and exhaust camshafts (the 4G63 featured MIVEC valve timing & lift switching on the intake side only).
Improved turbocharging allows for up to 20% faster response at lower engine speeds compared to the previous 4G63. The 4B11T provides a broader torque curve and produces more torque than the 4G63 at all engine speeds thanks to the engine's square bore and stroke design (both 86.0 mm). The redline begins at 7,000 rpm, with a fuel cut at 7,600 rpm to protect the engine. A semi-closed deck design, integrated ladder frame, and four-bolt main bearing caps contribute to the engine's strength and durability.
Unlike the 4G63, the 4B11T does not use balancer shafts. Aluminum is used for the timing chain case and cylinder head cover. The engine features an electronically controlled throttle, an equal-length short-port aluminum intake manifold, and a stainless steel exhaust manifold positioned at the rear of the engine. The use of a direct-acting valve train (buckets) eliminates the roller rocker arm configuration previously used on the 4G63, and the valve stem seals are integrated with the spring seats.
Note: Kit BC0130 is required
Applications
- 2008-2015 Mitsubishi Evolution X
Specifications
- Ad. Duration: 280° (IN) / 280° (EX)
- Duration @ .050": 240° (IN) / 234° (EX)
- Valve Lift (inches): .457" (IN) / .445" (EX)
- Valve Lift (mm): 11.61mm (IN) / 11.30mm (EX)
- Valve Lash (inches): .008" (IN) / .010" (EX)
What's in the box?
- 1 - BC Stage 3 Intake Cam
- 1 - BC Stage 3 Exhaust Cam
Warranty
- Standard Manufacturer Warranty