Twin Piston Blow Off Valve
On a turbocharged vehicle, when backing off the throttle, excess boost pressure can cause the turbocharger to slow down or even stall. The benefit of using a dump valve is that the excess pressure is either vented to the atmosphere or released back into the intake system, allowing the impellers of the turbo to keep spinning freely.
This extends the working life of the turbocharger and can give quicker response between gear changes. We make dump valves for fitment onto cars where there isn't already one as standard or for those cars where the OE re-circulating valve is being replaced for a heavier duty atmospheric type (the noisy type!).
Our dump valves are of a twin piston design so that they can be used on the majority of turbo applications where the car has a MAF sensor, MAP sensor, carb or mechanical fuel injection. Dump valves have also become increasingly popular because of the sound element involved.