My New Boost Valve

Following the recommendations from my tuner box distributer, I decided to purchase a boost valve today from the folks at boostvalve.com. Since placing the order 12 hours ago, the UPS tracking number reports that my new valve is already enroute from Florida and will arrive this Monday or Tuesday.

The valve should help reduce the boost spikes when I am driving at higher RPMs and allow me to run the tuner box at the maximum power settings without any problems. Joe from Diesel Tuning informed me that the combination of back pressure and excessive fuel have caused my car's boost to rise faster than the turbo's vanes can react. The turbo spikes ended up causing my ECU to react by pulling out timing from the motor. The result is lower torgue output.

According to the boostvalve.com, the component will not raise max boost but control the spikes/surges and effectively give better control of the turbo's wastegate. It prevents boost pressure from opening the turbo's waste gate until the desired preset boost level is reached. Inside the valve is a precision stainless steel ball that is held in place by spring tension. During the turbo's spool-up (as pressure is building) spring tension in the valve is greater than the boost pressure pushing against the ball, so the ball prevents the air from flowing to the wastegate actuator.

This maximizes the efficiency of the turbo during the spool-up by using the greatest amount of air possible to spin the turbo charger. Most boost control systems waste air by venting much of the air out, even many factory boost control systems waste available exhaust energy during this crucial spool-up period. Once the turbo spools up to the desired boost, the Boostvalve opens, quickly opening the waste gate. Boost pressure is held at this level with accuracy unmatched by even more expensive methods of boost control.

Below is the installation diagram for the boost valve from their website: