SpeedFactory Pistones de alta compresión full floating (motores Honda de la serie B)
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SpeedFactory High compression piston kit.
This premium SpeedFactory Racing B20 Type R Race Spec High Compression Piston Kit is engineered to deliver superior performance and reliability for high-compression, all-motor engine builds. Manufactured from high-strength AC9B hypereutectic aluminum alloy, these lightweight pistons offer exceptional scuff, heat, and seizure resistance while allowing tighter piston-to-wall clearances for reduced rocking and optimized ring seal. Complete with a friction-reducing Moly skirt coating and a premium gas-nitrided performance ring set, it is the ultimate upgrade for performance enthusiasts looking to maximize power, efficiency, and engine longevity.
Features:
- CNC-machined crowns with an enlarged top land for enhanced strength and resistance to breakage
- Constructed from high-strength AC9B hypereutectic aluminum alloy (much stronger than OEM pistons)
- MoS2 (Moly) skirt coating with a measurement window to minimize friction, scuffing, and wear
- Tighter piston-to-wall clearances for reduced piston rocking and an improved ring seal
- Compatible with both OEM connecting rods (do not use wrist pin clips) and aftermarket connecting rods (use wrist pin clips)
- Balanced, weight-matched sets to within +/- 1 gram
- Kit includes four pistons, floating wrist pins, premium performance ring sets, and wrist pin clips
Specifications:
- Available Bore Sizes: 84.0mm (308g), 84.5mm, and 85.0mm
- Compression Height: 30.3mm
- Dome CC: +5.7cc dome / -2.8cc valve reliefs (Net: +2.9cc)
- Wristpins: 21mm floating (for use with aftermarket connecting rods)
- Ring Set Dimensions: 1.0 * 1.2 * 2.8 Gas Nitrided Performance Ring Set
Fitments:
B20B/Z and sleeved 84mm+ B16A, B18A/B, and B18C engines
Approximate Compression Ratios at 84.0mm Bore:
(Actual compression will vary depending on gasket thickness and machining processes.)
- B16A Block and Head: 10.6:1
- B18C Block/Crank/Rods with PR3 Head: 10.3:1
- B18C Block/Crank/Rods with P72 Head: 10.6:1
- B18C Block, B18A/B or B20B/Z Crank/Rods with PR3 Head: 11.6:1
- B18C Block, B18A/B or B20B/Z Crank/Rods with P72 Head: 11.8:1
- B18A/B or B20B/Z Block and Head: 11.7:1
- B18A/B or B20B/Z Block with PR3 Head: 12.3:1
- B18A/B or B20B/Z Block with P72 Head: 12.6:1
Note: Add 0.13 for each 0.50mm increase in bore size. Actual compression will vary with material removal during machining processes and head gasket thickness.
Note on Installation: Piston-to-wall clearance is calculated before the coating is applied. Use the bore diameter of the piston kit and install the pistons to this bore size. If using limited nitrous or boost, add .0005” wall clearance.
