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When you press on the accellerator, combustion gas creates more exhaust pressure. The rise in exhaust pressure increases the speed of the turbo, thereby increasing the intake pressure, which is the turbo boost. You will not be able to benefit from turbo boost until the turbo spins up. That's where the lag comes from. It's inherent in turbo systems. Ive only had one turbo car but I know it had an air pressure activated dump gate that would only allow turbo air pressure to enter the intake at a preset PSI. There were ways to increase ( bigger boost) or decrease (more power throughout driving range) the gate release point with rheastats or performance chips.

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18y ago

What else can I help you with?