7301 Wastegate Actuator for the Mitsubishi EVO 4-8
designed to improve boost control
Part Number: 7301
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For immediate despatch.
The WGA is a high performance internal wastegate actuator designed to improve boost control on internally wastegated turbos. By using a significantly larger diaphragm area than the OEM actuator, the WGA has more control authority over the wastegate flap, meaning exhaust backpressure cannot override the flap position as easily, resulting in more stable and reliable boost control.
Supplied with 3 springs and a unique turnbuckle pre-load adjustment, the base boost pressure can be configured and adjusted from 5psi to 24psi for the best possible boost control.
The WGA features a longer stroke, shorter height, and more adjustment than its rivals.
WGA part # 7301 is designed to bolt on to EVO 4-8 models with the factory turbo. The 10psi and 7psi springs are installed for a base pressure of 17psi, with the 5psi spring included in the packaging for additional tuning options.
Please note that whilst this is a physical “bolt-on” product, it should be considered a tuning tool as it WILL increase boost pressure and therefore TUNING IS REQUIRED.
GFB WGA Benefits
(Compared to a Factory-Fitted Actuator)
- Faster spool up
- Less boost taper at high RPM
- More stable boost control
- Customisable spring rates
- Supports higher boost pressure
GFB's brand new and hotly anticipated WGA is a high performance internal wastegate actuator designed to improve boost control on turbo systems with an internal wastegate.
When diving into the world of increasing your car’s boost pressure, the limits of a factory-fitted wastegate actuator can soon become apparent. Even with electronic boost control it is not always possible to overcome wastegate issues such as boost drop off at high RPM, unstable boost curve, or an inability to achieve target boost.
Upgrading to a GFB WGA ensures you get the best possible performance and response from your turbocharger!
MASSIVE PERFORMANCE, COMPACT SIZE
It’s what we like to do here at GFB – maximize performance and minimize size.
Here’s how we did it with the WGA:
Industry-first diaphragm design - the WGA’s Nomex-reinforced silicone diaphragm is designed to achieve the largest effective diaphragm area with the smallest possible outside diameter. This gives the WGA more control authority over the wastegate flap, resulting in better boost control. It’s a bit like being the turbo’s puppet-master, rather than its puppet!
No unnecessary bulk sounds obvious, but attention to detail in the design means the WGA is the shortest actuator on the market.
Longest stroke – with 18mm of rod travel, the WGA is suitable for controlling the largest of internal wastegates, or the extra travel can be used to further increase boost pressure without having to change springs.
Unique pivoting rod guide – machined from PEEK (an extremely high-performance engineering polymer), the encapsulated spherical rod guide takes up significantly less height in the actuator body than other designs, whilst offering low friction and superior wear resistance.
MORE ADJUSTABLE, MORE EASILY
Setting the base spring pressure correctly for your application can have significant performance benefits, so we made sure the WGA offers the best adjustability on the market!
We supply 3 stainless steel springs that can be used in any combination ranging from 5psi to 22psi, but that’s only the beginning. Whilst other brands may offer more spring options (sold separately), changing springs to fine-tune boost pressure is time consuming and, quite frankly, a pain in the butt.
That’s why we added another industry-first: turnbuckle adjustment. Because the WGA was designed with a long stroke, it is possible to use some of that extra stroke length to fine-tune the base boost pressure in a matter of minutes without swapping springs or removing the actuator.
As an added benefit, the turnbuckle makes swapping springs so easy that it can often be done without removing the actuator from the car!
AVAILABLE IN BOLT-ON OR UNIVERSAL KITS
Evolution (1996 to 2005)
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