How to Change the Boost on a Stock Nissan Skyline

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Even in stock form the Nissan Skyline is a formidable machine. It offers classic Japanese muscle car looks, an advanced 4-wheel-drive system (in GTR trim), and plenty of electronic gadgetry needed to monitor a host of vehicle parameters. The bullet-proof RB series engines produces as much as 280 horsepower straight from the factory, although many tuners quickly recognized the immense performance potential of the Skyline platform. Enthusiasts began to add basic performance upgrade packages, however some modified their vehicle for competition; in the process, squeezing double the factory rated output on an internally stock engine. The factory turbo system is engineered for reliability and longevity, as such, it is a great place to unleash vast power gains relatively cheaply and easily.

Things You'll Need

  • Manual boost controller kit.
  • Zip-tie.
  • Connect the boost controller to the vacuum line coming off wastegate actuator, located on the back of the turbocharger unit. (connect the side that has a small hole in the barb)

  • Attach the other side to the boost source outlet, again via vacuum hose.

  • Zip-tie the controller in place; away from excessive heat sources such as the exhaust manifold.

  • Perform a full-throttle pass to get a base-line reading. This will show your exact factory boost pressure setting. (typically around 7 psi on a stock Skyline)

  • Adjust the boost setting on the controller by slow turning the knob in the desired direction.

  • Do several full throttle passes (third gear is recommended for accuracy) in order to fine tune the desired boost setting.

Tips & Warnings

  • An air-fuel gauge and knock sensor warning system is highly recommended to monitor engine conditions when exceeding factory settings.
  • A boost pressure gain of 3-4 psi (pounds per square inch) is typically safe for stock fuel systems.
  • Use hose clamps (included in most kits) to prevent vacuum lines from slipping of controller.
  • Raising boost pressure beyond factory limits can potentially damage engine components, proceed with caution.
  • Always use a track or closed road when performing high speed runs.

References

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