Stroker Kits

A Stroker Kit is an aftermarket assembly that increases the displacement of a reciprocating engine by increasing the travel of the piston (that is, the piston moves further up and/or down in the cylinder). This is done by using a different crankshaft where the crank pin is moved further away from the center of the axis of rotation of the crankshaft. While this increases displacement and torque it can potentially lower the limit to which the motor can rev safely compared to the stock configuration.

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Brian Crower Stroker Kit
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To understand the benefits is simple enough: Power and torque comes from burning fuel. While squirting more fuel into the engine is simple enough, it won't do any good if you don't provide more air also. By increasing the stroke of the engine (and also the bore, too) you can increase the size of the engine. No, I'm not talking about the physical outside dimensions of the engine, but the "breathing capacity" of the engine.

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