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Old 10-23-2012, 12:10 AM   #19
Scooby Newbie
Member#: 311224
Join Date: Feb 2012
Chapter/Region: MWSOC
Location: South East Michigan
2011 Impreza WRX


The issue with the hypereutectic pistons, and a combination of randomly high heat and high pressures. The silicon content in these pistons is not always uniformly dispersed. Anywhere from 12% to 19% silicon could be in each individual piston, resulting in uneven heating, expansion etc.

Monitoring knock feedback is a must. Ensuring the engine has the fuel it needs to prevent premature detonation will definitely keep your engine running longer.

Hope this helps
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