A dump valve or turbo valve reduces the reaction time of a turbo and improves its reliability. The turbo compresses the air in the intake. However, when the throttle is released, the throttle valve closes and the compressed air can no longer go into the intake, resulting in a significant increase in pressure in the air system.

This slows down the turbo and, inevitably, lengthens its response time (which, in turn, increases wear and tear prematurely).

The purpose of installing a dump valve is to release this excess air pressure very quickly when the throttle is released. The air is evacuated by the dump valve either externally (hence the pschitt) or internally (back into the intake manifold).

This Forge dump valve allows the control of the turbo boost through the dump valve.

Circuit: single piston

Type: Closed Circuit

COMPATIBILITY

• AUDI
  - A3 1.8T
  - S3 1.8T (Chassis 8L)
  - A4 1.8T (modeles B5, B6)
  - RS4 B5 V6
  - A6 Allroad 2.7 Bi-turbo / 1.8T (modeles B5, B6)
  - RS6 TT Mk1 150/180bhp / TT Mk1 2100/225bhp

• FIAT
  - Punto GT 1.4 (1993-1999)
  - Fiat 20v coupe

• FORD
  - Fiesta RS Turbo
  - Focus RS Mk1
  - Escort Cosworth / RS Turbo
  - Sierra Cosworth

• LANCIA
  - Delta

• NISSAN
  - Micra IG-T 90 Tekna

• SAAB
  - 93 / 95

• SEAT
  - Ibiza Mk3 essence / Mk4 essence
  - Leon
  - Cupra 1.8T / R 1.8T

• RENAULT
  - 5 GT Turbo

• SKODA
  - Octavia 1.8T

• VOLKSWAGEN
  - Beetle 1.8T
  - Golf Mk4 1.8T
  - Passat 1.8T
  - Polo 1.8T