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  2. Hypereutectic piston - Wikipedia

    en.wikipedia.org/wiki/Hypereutectic_piston

    However, hypereutectic pistons experience less thermal expansion than forged pistons. For this reason, hypereutectic pistons can run a tighter piston to cylinder clearance than forged pistons. This makes hypereutectic pistons a better choice for stock engines, where longevity is more important than ultimate performance.

  3. SPX Corporation - Wikipedia

    en.wikipedia.org/wiki/SPX_Corporation

    In 1925, Piston Ring bought the No-Leak-O Piston Ring Company, allowing the company to increase production of engine components. [8] [10] After acquiring Accuralite Company in 1931, the company changed its name to Sealed Power Corporation and also started manufacturing piston rings, pistons and cylinder sleeves for various military applications ...

  4. Compression ratio - Wikipedia

    en.wikipedia.org/wiki/Compression_ratio

    In piston engines, static compression ratio is determined using the cylinder volume when the piston is at the top and bottom of its travel. The compression ratio is the ratio between the maximum and minimum volume during the compression stage of the power cycle in a piston or Wankel engine .

  5. Hydraulic clearance - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_clearance

    Pistons: The clearance between the piston and cylinder wall is crucial for preventing leakage and maintaining hydraulic efficiency. A tight clearance minimizes fluid loss, while a clearance that is too small can lead to increased friction and wear. The piston's design and the material used influence the optimal clearance. [2] Hydraulic spool ...

  6. Two-stroke power valve system - Wikipedia

    en.wikipedia.org/wiki/Two-stroke_power_valve_system

    A stroke is the action of a piston travelling the full length of its cylinder.In a two-stroke engine, one of the two strokes combines primarily the intake stroke and the combustion stroke, while the other stroke primarily combines the compression stroke and the exhaust stroke, though technically since both ports are exposed during both the combustion and compression strokes, some reversion ...

  7. Subaru Impreza (second generation) - Wikipedia

    en.wikipedia.org/wiki/Subaru_Impreza_(second...

    Unlike the EJ207, it features hypereutectic cast pistons. According to Subaru USA, this latest STi piston is a cast aluminum design. [citation needed] However, this is a special hypereutectic material and it has an augmentation of 120% in terms of strength over their previous aluminium pistons. [16]

  8. Lycoming O-235 - Wikipedia

    en.wikipedia.org/wiki/Lycoming_O-235

    Power 115 hp (86 kW) at 2800 rpm, dry weight 246 lb (112 kg) Provision for dual pump drives, tractor and pusher installation. [2] O-235-C1A Power 100 hp (75 kW) at 2450 rpm, dry weight 236 lb (107 kg) Similar to O-235-C1 except ignition timing, lower rpm and power. Optional 2 position or automatic propeller governor drive. [2] O-235-C1B

  9. Big-bang firing order - Wikipedia

    en.wikipedia.org/wiki/Big-bang_firing_order

    This is primarily because each piston needed its own sealed crankcase volume for the purposes of efficient induction, where in some cases separate crankshafts served each bank in order to achieve this. The Honda NSR500 began and ended its life as a "screamer", where the pistons were phased similarly to a four-stroke V-four with a 180° crank ...

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