KIT Motorsport Piston 5inline 81.5 / 82 / 82.5 / 83mm + Motorsport H-Beam Con-Rod 159 / 22mm 8.5:1 for Diesel Block + 92.8mm Crankshaft

Our solution for building power in the diesel block using the 92.8mm Motorsport crankshaft. This increases the displacement to approximately 2.5L – while retaining the engine's rev-happy character and taking advantage of the significantly more rigid diesel block (engine speeds up to 8,500 RPM are achievable).

With this KIT we bridge the gap to the 2.5L conversion using 22mm gudgeon pins. Beyond a certain power output and engine speed, the undersized 20mm gudgeon pin tends to bend or cause the piston pin bosses to elongate – becoming oval. At even higher power levels, the OEM 20V bearing webs tend to crack; the diesel block offers significantly greater rigidity in this regard.
Please note: the diesel block must be surface-milled by exactly 1.35mm to ensure the pistons do not sit below deck.

The KIT consists of:

Motorsport piston 5inline 81.5 mm to 83.0 mm (please select the correct bore size) + Motorsport H-beam con-rod 159mm / 22mm. Compression ratio: 8.5:1. This KIT has already been used to achieve over 1,000 PS. Arguably the best con-rod and piston combination currently available.

Pistons:
Manufactured from 4032-T6 (piston skirts are molybdenum-coated)
Each set incl. rings and HD-series gudgeon pins.
Bore diameter: 81.5 / 82.0 / 82.5 / 83.0 mm
Compression ratio (CR): 8.5:1
Gudgeon pin: 22 mm
Crankshaft stroke: 92.80 mm

Con-Rods:
Profile: H-beam
C-to-C: 159 mm
Crankshaft journal diameter: 50.6 mm
Gudgeon pin diameter: 22 mm
Material: 4340 EN24 forged steel
Quantity: 5 pcs., 10 pcs. ARP2000 con-rod bolts
Max. con-rod power: 250 PS (1 piston) and 9,000 RPM

For:
Audi 200, S2, RS2, S4, S6 – 2.2 2.5 20V Turbo


Example images!