Supertech 84mm Bore 12.5:1 Pistons

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  • Description

Supertech Honda B20 Block B16 Head 84mm Bore +5.5cc Dome 12.5:1 CR Pistons - Set of 4 (Excl Rings). Part# P4-H84-P5

Bore: 84.00mm
Over Size: Std.
Comp Ratio: 12.5:1
Dome Dish: 5.5
Head CCs: 42.7
Comp Height: 1.181" (30mm)
Stroke: 3.504"
Skirt Style: Slipper Design
Rod Length: 5.394"
Pin Diameter : 21mm (.827")
Material: 4032
Weight: 310
Application: All Motor / Nitrous
Ring Part Number: R84-GNH8400

Supertech Pistons are manufactured from extruded high silicone, enhanced 4032 alloy (with additional Cu, Ni & Mg) that had low thermal expansion, excellent wear resistance and higher thermal conductivity. Supertech Pistons, with this alloy, have withstood up to 42psi of boost, with alcohol, without any problems.

A two or three step forging process yields a fine structural grain which are then submitted to several machining steps in state of the art CNC machines. Several heat treatments provide the piston with high tensile strength and evenly distributed hardness.

Contact reduction grooves are standard, and pin bores are honed and reamed for precise fit. Wrist pins are constructed of cold extruded chrome moly steel for high strength and used with wire clip locks.

Finally, the pistons receive a 'phosphate dry lubricant' coating to protect the rings against 'micro-welding' and enhance lubrication on the skirt/cylinder area.

High silicone enhanced 4032 alloy (with additional Cu, Ni & Mg)
High tensile strength and evenly distributed hardness
Phosphate dry lubricant coating
Undercut stem
Excellent wear resistance and higher thermal conductivity
Enhanced lubrication on the skirt/cylinder area

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