![]() How does an increased compression ratio affect engine performance? To understand how increasing the compression ratio affects performance, we have to start with understanding what happens to the fuel/air mixture on the compression stroke. IF THE TEMPERATURE OF THE MIXTURE INCREASES TOO MUCH BEFORE THE FIRING OF THE SPARK PLUG, THE MIXTURE CAN AUTO IGNITE. THERE ARE LIMITS TO HOW MUCH THE MIXTURE CAN BE COMPRESSED PRIOR TO COMBUSTION. We’ll take a look at what increasing compression ratio does and what effects it has on the engine, detail how high-compression pistons are made, and provide a high-level overview of which applications may benefit from utilizing a high-compression piston. Piston manufacturers, like JE Pistons, offer high-compression pistons for many applications, but there are important benefits and drawbacks you should consider when deciding if a high-compression piston is right for your application. Whether you are racing or looking for increased performance out on the trail, there are a plethora of performance upgrades to consider to increase the power of your machine. MXA takes a look at what effects higher compression has, designing high-compression pistons and what factors to address when considering adding one. ![]() High-compression pistons are a common upgrade for dirt bikes and other motorcycles, but bumping up compression isn’t always beneficial. It’s important to first understand what effects high-compression has, the anatomy of a high-compression piston and what applications typically benefit most. Bumping up the compression in your engine should be an informed decision. ![]()
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