The Tomei 2.3L 98mm stroke forged billet crankshaft for Mitsubishi Evo X’s 4B11T engine features full counterweight to enhance balance, reduce vibration, and minimize bending. This design also improves oil supply from two crank journals, increasing resistance to bearing seizure.
Vehicle Fitment:
2008-2015 Mitsubishi Evolution X
(4B11 Engine)
| Application | 2.3L 4B11 |
| Stroke (mm): | 98.00 (OEM +12.0) |
| Crank Pin (mm): | 52 |
| Main Journal (mm): | 52 |
| Counterweight: | FULL (8) |
| Material: | 4340 |
| Surface Treatment: | NITRIDING |
| Weight (lbs): | 37.04 |
More Info:
The reciprocating motion of the pistons is converted into rotary motion to rotate the wheels. High torsional and bending rigidity, along with wear resistance of the shaft, are crucial. Weights on both sides of the crankpin enhance the balance ratio, reducing vibration and minimizing bending. Sharpened edges on the counterweight reduce resistance in the oil pan. The X design with 2-port lubrication increases oil supply from two crank journals, improving resistance to bearing seizure. WPC processing of the crank pulley mount prevents seizing issues. Precision quality control with CNC machines and 3D inspection ensures high accuracy.
