Internal Wastegates
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THE GFB WGA IS AN INTERNAL WASTEGATE ACTUATOR DESIGNED TO IMPROVE BOOST CONTROL ON TURBO SYSTEMS WITH AN EXISTING 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!
WGA BENEFITS
(COMPARED TO A FACTORY-FITTED ACTUATOR):
- Faster spool up
- Less boost taper at high RPM
- More stable boost control
- Customizable spring rates
- Supports higher boost pressure
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!
