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Old 01-17-2003, 12:08 PM   #36
Jon [in CT]
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Member#: 2992
Join Date: Nov 2000
Chapter/Region: NESIC
Location: Connecticut, USA
02 WRX Sedan

Default Re: Vishnu Reset?

Originally posted by Vishnu Performance
Hey, doesn't anyone want to know why this works? I don't think anyone has asked that yet... any guesses?
The ECU will go into a learning mode when the following conditions are met:
  • Engine RPM is less than or equal to 5000 RPM
  • Manifold Absolute Pressure is greater than or equal to 900 mmHg (17.4 PSI)
  • Engine Coolant Temperature is greater than 70C (158F)
During this learning mode, the ECU is bascially judging your octane level and trying to figure out how far it can advance ignition timing toward maximum brake torque timing without sufferring too much knock.
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