This replacement actuator utilises the latest piston design to irradicate the failures associated with the OEM diaphragm actuators and is supplied complete with bracket ready to install. This actuator was recently put through some independant dyno tests by the guys at Dragsport Magazine for their September 2009 issue. Here is what they had to say: While the Mitsubishi Evo X is an amazing vehicle in stock form, it also responds well to tuning with quality aftermarket components. In stock form, our 2008 Evo X delivered 271.4 wheel horsepower. With the adition of just three parts, we were able to generate an additional 25.5 horsepower and 19.0 lb/ft of torque to the wheels (intake + 5hp, exhaust +10hp, and hard pipe kit +5hp). Recently, we decided to treat the Evo X to a second round of upgrades. First we re-established the baseline power at 289 on a different chassis dyno that tends to be a bit conservative in its figures. Since the Evo X would experience erratic boost delivery throughout the powerband, we selected a Forge Motorsport wastegate actuator.

With the stock actuator, the boost would climb to 19 PSI before falling to 15 PSI at redline. With the Forge unit installed, the engine was able to maintain 20 PSI before falling to only 18 PSI at redline. With the increased boost pressure, peak power jumped to 302 horsepower and 304 lb-ft of torque to the wheels; a gain of 13 horsepower over the previous run. The largest power gain was noted at 6800 rpm with a gain of 47 horsepower over stock. Here are the dyno results for Power and Torque to see for yourselves.

This product is subject to a Patent Application This product is built with a predetermined actuator spring suitable for at, or slightly above factory boost levels. The actuator can be assembled with a stiffer spring upon request. Please contact us directly concerning this process It is designed and built with the intention of increasing the boost output of a turbocharged system. We cannot guarantee compatibility with all applications, nor the ability to increase the boost output beyond a level that is within the parameters set by the engine-management-system of the given vehicle at the time of installation, whether that system is factory or aftermarket.

Forge Motorsport nor any of it’s authorised distributors can assume any responsibility for any adverse effects resulting from the installation and tuning of this product onto a vehicle whose engine-management-system, whether factory or aftermarket, is not capable of allowing for the desired level of adjustment. While Forge Motorsport is happy to supply you with an actuator capable of holding boost beyond that of your factory unit we are in no way capable of knowing nor suggesting that your vehicle's engine or related systems are capable of supporting or surviving the stresses of such elevated boost pressure. After requests for a very durable, fit and forget version of our actuators that would withstand the rigors of marine corrosion or simply would not tarnish, we have now added the option of ordering any of our piston design actuators with stainless steel bodies and external components/fixings. This option does incur a surcharge and will be shown when added to your basket.

Diaphragm sealed internals are the default selection for this actuator product but customers now have the option of piston sealed internals. Unique to Forge Motorsport this innovation offers equal performance to the diaphragm type and low maintenance due to the hard wearing nature of piston sealed valve internals. Please contact us by email if you require more information