A turbocharger uses the exhaust gas from an internal combustion engine to spin a fresh air turbine pump. The turbine literally pumps oxygen-rich air into the combustion chamber(s) of the engine, which increases burning efficiency and in turn, increases overall engine power. A turbo is more efficient at pumping fresh air into an engine the faster it turns, and this action is dependent on both RPMs and engine load; when a turbo has been preloaded, the turbine has essentially been run up to speed with the vehicle standing still to gain more power for take-off.
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Difficulty:
Moderately Easy
Instructions
Automatic Transmissions
1
Start your vehicle and depress the brake pedal to lock the brakes.
2
Shift your vehicle into "drive" then press down on the gas pedal as you continue to hold down the brake. Use a tachometer as a guide and rev the engine up to 2,000 RPMs. If there is no tachometer, rev the engine until the vehicle begins to move forward, even as your foot is holding the brake pedal down. This action will preload or "spool up" the turbo.
3
Release the brake pedal and simultaneously depress the gas pedal. The preloaded turbo will give you spirited acceleration from a standing start, providing you with extra horsepower for situations, such as merging on a freeway or tollway on-ramp.
Manual Transmissions
1
Start the vehicle, depress the clutch pedal and shift into first gear.
2
Use a tachometer to rev up the engine to approximately 2,000 RPM. If no tachometer is available, rev the engine slightly but do not over-rev.
3
Hold the engine at approximately 2,000 RPMs then release the clutch while pressing on the gas pedal. Acceleration from a standing start will be lively. With no tachometer, rev the engine slightly, release the clutch then press on the gas.
Tips & Warnings
A vehicle equipped with an automatic transmission will preload a turbo better than a manual transmission vehicle. When the clutch on a manual transmission vehicle is pushed in, the engine spins freely and produces less exhaust gases. An automatic transmission vehicle is always under load with the transmission engaged and the brake pedal depressed, and therefore produces more exhaust gas to spool up the turbo.
