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Message: <blockquote data-quote="farraen" data-source="post: 4146809" data-attributes="member: 88280">Hi Guys,I'm owned a Neo CPS for 7 months now. Only had problems with the knocking sound. I was told that one of the control arm hits the chassis. Anyway, everything else is fine. Some info about revving hard for new engines. New engines needs to be "break in" first before the engine reaches it's optimum state.No engine in this world that does not require break in before revving hard. Even small engine like the rc engines also need to be break in. Why we need that is because when the engine is manufactured, there are rough surfaces between the bearings, cylinder wall, tolerances between the moving components. So it needs to go through some break in sequence before revving hard. From what i have learn, there are two ways of break in, soft and hard break in. Soft break in is kinda a sequence where we put some low load to the engine, and rev from low speed to high speed and then finally higher load and high speed after few hundred kilometers. At the dyno, the engine was supposed to be break in around more than 15hours, before the torque and power achieves the maximum value. After that all the valve and valve seat, the cylinder wall, etc will fit together. By then, the engine should met the performance requirement by Proton.For the hard break in, it's something employed by some racing teams, they said "to run it hard, break it hard". It's still unclear which method is the best for durability. I don't believe this method will give time for the components to reach it's tolerances. Anyway, from my personal view, soft break in should slowly fit the engine components, it will also increases the engine life. The first few services is also critical, where the engine oil need to be changes because some residues from the components is left in the oil, that is why i needs regular change until the engine is fully fit. If you use metal detecting measuring devices and measure the engine oil, you could detect the residue from the engine component.Sorry for the long story. Hehe. For my car i didnt rev it hard until few hundred kilometers. Now it's already good to rev hard..</blockquote>

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