Wössner Forged Piston Kit

Wössner forged piston kit.



Fits:
Porsche 911 3.2 12v 1983-90

Suitable to use with Nikasil liners.

Specification
Technical information is sourced from Wössner's latest catalogue:

Part Number: K9255
Engine Type: 930.20 / 930.21 / 930.26
OE Bore Size: 95.00mm

Bore Sizes Available:
- 95.00mm - 3164.18cc, Compression Ratio: 10.5:1
- 98.00mm - 3367.18cc, Compression Ratio: 11.1:1

Bore Size 95.00mm
Piston Size: 94.95mm – K9255DA
Over Size: 0mm
Displacement CC: 3163cc
Dome / Bowl Volume: 36.5cc
Wössner Comp Ratio: 10.5:1
Ring Part Number: 950XSY

Bore Size 98.00mm
Piston Size: 97.95mm – K9255D300
Over Size: 3mm
Displacement CC: 3mm
Dome / Bowl Volume: 36.5cc
Wössner Comp Ratio: 11.1:1
Ring Part Number: 980XSY

Standard
Stroke: 74.4mm
Dome/Bowl Volume: +36.5cc
OE Comp. Ratio: 10.3:1
Comp. Height: 32.80mm
Valves Per Cylinder: 2
Cylinders: 6

Please CLICK HERE for Technical release – Piston / Con rod
orientation.

Wössner are regarded by Europe's leading motor sport engine builders as being the piston of choice when building an engine not only to perform, but to withstand the stresses and duress's of competition life. Wössner pistons feature a unique PTFE coating on the skirts and a grade of 4032 Alloy (T6) which allows the engine builder to run a closer piston to bore tolerance then he might do on another make of piston. This helps remove the slapping noise during cold start, common place among engines running forged pistons due to larger then OE bore clearances. The crowns of the pistons are also polished to better resist detonation on a high performance engine. Polishing allows a more even spread of heat inside the chamber which will help prevent "hot spots" on piston crowns. Price includes all piston rings and gudgeon pins.

Price shown is for complete engine set.