Nissan Sr20de Engine Build Up Smoothing Combustion Chamber
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Next, a cartridge roll is used to blend the 30-degree cut smoothly into the combustion chamber and the 75-degree cut into the port wall. The roll is also used to lightly polish and deburr the combustion chamber to eliminate sharp edges that can cause detonation. For a big-buck porting job, the head porter might spend a lot of time polishing the ports and combustion chamber but since we're poor, we only hit on the important rough areas. View Related Article
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