Wiseco B series 81.5mm Low Compression Pistons
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Wiseco forged piston set for Honda B18C, B18A1/B1, B16A, B17A1 and B18 with B16A head. The set includes piston rings, piston pins, and pin clips. Set of four 81.50mm Wiseco forged alloy pistons with Armor Glide™ on the skirt which minimizes friction, improves wear resistance, and helps increase power; and Wiseco Armor Plating™ which reduces heat on the dome, reduces the effects of detonation, and creates a hard yet smooth surface for the rings to rest on. These pistons allow maximum flow around the valves, and feature a Piston Crown shape to promote Intake charge efficiency resulting in more added power. Wiseco pistons also feature a skirt profile to optimize squish or quench during the compression and combustion cycle resulting in resistance to detonation and pre-ignition, therefore increasing the engine’s longevity. Pistons are precision machined and have an excellent surface finish. The ring groove are CNC machined with tight tolerances. The included piston pins are high quality 9310 low carbon steel and the pin clips are Spirolox made from a chrome silicon material for excellent yield strength.
Application: B18C1, B18C5, B18A1, B18B1, B18A/B w/ B16A head, B17A1*, and B16A*
1994-2001 USDM/JDM Integra, 1990-2001 USDM Integra, 1992-1993 Integra GSR*, 1993-2001 JDM Civic Si*, 1991-1993 JDM Civic Ferio*
* must use at least 0.040" thick head gasket.
Piston:
Bore: 3.209" / 81.50mm
Compression Height: 1.181" / 30.00mm
Dome: dished -8cc
Compression:
B16A: 8.1:1 (42.7cc head, .040 minimum gasket thickness)
B17A1: 8.4:1 (42.7cc head, .040 minimum gasket thickness)
B18C: 9.0:1 (43cc head, .030 gasket)
B18A1/B1: 8.5:1 (45cc head, .040 gasket)
B18A1/B1 w/ B16A head: 9.0:1 (42.7cc head, .030 gasket)
Piston Pin: S733
Safely handles 200hp per cylinder
Wall thickness: 0.225" / 5.72mm Heavy duty pin (Wiseco's thickest pins available)
Length: 0.827" / 21mm
Material: 9310 low carbon case hardened steel, 0.025Ra or better surface finish.
Piston Rings: 8150XX
1st ring: Alloy steel, gas nitrided, barrel faced.
2nd ring: Cast iron, phosphate coated, taper faced, napier hook.
Oil rings: 3-peice assembly, stainless steel flex vent spacer, gas nitrided rails.
