Description
HKS 2200cc Step 1 Stroker Kit S20DET 86.5mm Pistons
φ86.5 Piston is available for SR20DET 2.2L KIT.Users can select between φ86.5 (STEP1) and φ87.0 (STEP2) for condition of cylinder block or required specification of the engine.
■Features
Displacement of SR20 is increased from stock 1,998cc to 2,139cc.The larger displacement will increase torque. It enables to be used with large flow capacity turbines.*STEP2 φ87.0 is 2,164cc.φ86.5 Piston is considered as STEP1 of 2.2L Kit. The surface treatment of STEP2 (φ87.0) is not done for STEP1 to achieve the affordable price. This kit is also recommended for overhauling purpose. Feel the power of 2.2L.*Although it is STEP1, it is forged piston. Forged connecting rod and forged crankshaft are the same items as STEP2 that means the maximum target horsepower is the same.*φ87.0 piston is STEP2. It has nickel plating, which is more durable against knocking, on the piston top and ober coating, which reduces friction, is on skirt portion.MADE IN JAPAN (HKS in house production).
■Selection of STEP1 (φ86.5) or STEP2 (φ87.0)
| HKS 2.2LKIT STEP1 | HKS 2.2LKIT STEP2 | |||
| Piston | Bore (mm) | 86.5 | 87.0 | |
| Displacement (cc) | 2,139 | 2,164 | ||
| Compression ratio (ε) | G/K1.2mm | 8.7 | 8.8 | |
| G/K1.6mm | 8.4 | 8.5 | ||
| G/K2.0mm | 8.2 | 8.3 | ||
| Crown height | 4.8 | 4.8 | ||
| Crown volume | 15.3 | 15.3 | ||
| Top coating | – | nickel plating | ||
| Skirt coating | – | ober coating | ||
| Remark | /oil ring: 2 piece | /top ring: titanium coating/oil ring: 2 piece | ||
| Connecting rods | same → | Forged H-beam Connecting rods | ||
| Crankshaft | same → | Forged full counter crankshaft | ||
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