Made by Tial and used to change the spring pressure on the Tial BOV to affect the BOV response tuning to reduce comprssor surge. Different spring levels affect amount of vacuum required on each engine to open the BOV on throttle release.
Made by Tial and used to change the spring pressure on the Tial BOV to affect the BOV response tuning to reduce comprssor surge. Different spring levels affect amount of vacuum required on each engine to open the BOV on throttle release.