1. Velocity pressure generated by the turbo must decrease when the throttle is closed (i.e. with the gas pedal released). Otherwise, the accumulation of air would slow down the speed of the compressor. To prevent this, the valve opens the bypass channel. Due to this, the air goes to the suction side, and the compressor maintains the speed.
2. If the gas pedal is pressed again, the traction cut-off valve closes immediately. The blower operates at full speed and can immediately supply compressed air. If the boost were only gaining momentum, then it would be impossible to spontaneously gain power - the engine would have the famous «turbohole».
Checking the draft shut-off valve
If the engine feels a noticeable slowdown in power increase after the thrust phase, then the cause may be in the thrust cut-off valve. Carry out the following check:
1. Remove the draft shut-off valve.
2. Connect a vacuum pump to the thin control hose of the draft cut-off valve or suck vigorously with your mouth.
3. The draft shut-off valve should open, clearly visible through the hose connections.
4. Maintain reduced pressure for 30 seconds if possible (if necessary, bend the hose).
5. The draft shut-off valve must remain in this position at this time.
6. Open the hose again: the draft shut-off valve should close.
7. The shutter in the draft shut-off valve must be easy to open and close and fit snugly in every situation.
8. Installation: The draft shut-off valve must be secured with screw clamps at all hose connection points.
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