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NA Tuning - Stage 1
Gran Turismo 3: A-Spec

NA Tuning - Stage 1

Learn how NA Tuning - Stage 1 increases naturally-aspirated engine power in Gran Turismo 3: A-Spec by adjusting compression, ignition, and valve timing.

By ···10 min read·Multi-source verified
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Learn how NA Tuning - Stage 1 increases naturally-aspirated engine power in Gran Turismo 3: A-Spec by adjusting compression, ignition, and valve timing.

Walkthrough
  1. 1
    Replace the gasket with a thinner one to increase the compression ratio.
  2. 2
    Adjust the ignition period.
  3. 3
    Adjust the valve timing.
  4. 4
    Replace the exhaust manifold.
Tips
  • This upgrade increases peak power.
  • This upgrade does not change the torque at low engine speed.

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