Spool Mitsubishi 4G63 Stroker Crankshaft - 94mm

Mitsubishi 4G63 94mm 4340 Stroker Crankshaft

With the increased cubic capacity from the 94mm stroker crank, increases in torque and low to mid range power are achievable. Boost will come on earlier in the rev range and peak power will increase.

Full Forged 4340 - Nitrided, Balanced and Full Counter Weight Crankshaft

The 4G63 engine in its factory form has a 85mm bore and 88mm stroke, giving a displacement of 1997cc.

Using the 94mm stroker crank, standard length conrods and custom pistons, the displacement is increased as follows:

• 85.5 mm bore and the 94 mm stroker crank = 2159cc / 162cc increase
• 86 mm bore and the 94 mm stroker crank = 2184cc / 187cc increase

Note: If conrod to block interference occurs, slight clearancing may be required.

• 4340 Grade Billet Steel
• Fully Counter Weighted
• Nitrided Finish
• Fully Balanced
• Stroke 94mm

Engine build fitment

4G63. Match the selected dimensions, engine generation and rotating assembly specification before machining or assembly.

Installation and BBT workshop support

Measure journal and thrust clearances, check block clearance and balance the complete rotating assembly. Confirm the damper, crank trigger and flywheel arrangement with your engine builder.

Built by Boost & Tune is an authorised Spool Imports dealer and can assist with component selection, engine assembly and tuning requirements for your build.