Crankshaft 4140 Chrome-Molybdenum 74mm

Crankshaft with counterweight made of 4140 chrome-molybdenum.
Stroke: 74 mm.
Type 1 engines.
Type 3 engines.
CT/CZ engines.

A crankshaft with counterweight prevents vibrations and foaming at high speeds, so it is a very good investment for anyone whose engine regularly runs above 4500 to 5000 rpm. The engine runs more smoothly, can produce more power and has a longer service life than if you fitted the original crankshaft.

All Type 1, Type 3 and CT/CZ crankshafts have 8 locking holes (the locking pins are fitted) for mounting the flywheel and are drilled asymmetrically, so that the flywheel can only be fitted in one direction on the crankshaft, which is important when balancing.

If you do not fit a new, lighter flywheel with 8 holes as standard, you have to add 4 extra holes to the existing flywheel with tool 01103. Fitting the flywheel on 4 bolts is possible, but is not recommended for engines with higher power.

All crankshafts are fitted with large oil channels, a cross-drilling for better oil flow and a micro-polished bearing bed, and are dynamically balanced (re-balancing with flywheel and crankshaft pulley is recommended). These crankshafts are also made from a single forging of chrome-molybdenum 4140 or 4340. Chrome-molybdenum 4340 is one of the most resistant metals we know, so it is very suitable for crankshafts, especially when we want to achieve high power from them.

All crankshafts are designed for connecting rods with VW dowel pins with original VW dimensions. On long-stroke crankshafts the crankcase must be modified; if you buy a "Super Stock" crankcase (only available for Type 1 and Type 3 engines) the modification is zero or very minimal, as these are adapted for a longer stroke.

Note: Clean the oil channels thoroughly; some grinding residue may still remain from the factory.