Looking to put an adjustable wastegate actuator on my GT2560R turbo on my FM kit. Does such a thing exist? This kit uses washers to adjust the wastegate but they only give you a 5-7psi range. I'd like some more boost (w/ injectors and tune of course).

Bonus question, anyone running an electronic wastegate actuator? Seems overkill and borderline unnecessary, but would be a lot of fun to tinker with have complete boost control. I believe an MS3PnP can control it via PWM.

 

Bump for the follow. You asked the question I was thinking about. LoL

 

There are options available out there for a wastegate actuator if you search google. The higher the psi in the actuator the later it should open. Now total boost control will be dictated by your turbine flow capabity and overall system, but you can swap actuators.

https://shop.garrettmotion.com/spare-parts/actuator

 

Not knowing your setup, what is your target boost? Do you have forged rods and larger injectors? What ECU? With the OEM injectors you're playing with fire above 10-12 psi. Yes an MS3 can be tuned to control boost using open or closed loop. Washer preload had one negative effect in my experience. At part throttle the wastegate is closed longer and the turbo always aiming to hit maximum boost so the engine isn't as docile/easily controlled. Also, check your bracket for cracks, when I bought my car the FM2 kit had three washers added and the original bracket (2010 install) cracked into two separate pieces. Last summer I switched to zero washers and then back to one washer. Each time I had to retune EBC settings in the MS3 as the required boost duty #s change.

With no washers my turbo was hitting 6-7 psi with a slower ramp up (can be tuned using EBC). This felt great around town or in parking lots compared to three washers preload. One washer gave me 7-8 psi for lowest boost. High boost is 18 psi with slightly more DC added between 5500-7600 RPM (I'm using Supertech heavy double springs). I was surprised it could hold 18 psi through redline, with MBC it fell off above 5500-6000 RPM but part of that was taking the boost pressure source from the turbo housing instead of post-intercooler.

 

Good input! I've too noticed that this kit makes a ton of boost at part throttle. I think I have 2 washers now and it peaks at about 7psi. So are you using the actuator that came with the kit, no washers, and an EBC?

 

I'm using the original actuator from the first owner that purchased the FM2 fully Garrett upgrade kit for his MSM. I'm back to using one washer and have to wonder if three washers usage over a longer period of time caused wear on the actuator. It just felt better with one washer spacer, response wasn't as soft as none and I can live with 7-8 psi minimum boost. EBC is so much better than I expected compared to MBC. Closed loop is more difficult to tune, I see why many stick with open loop but above base boost you can tune the target to RPM (above ~3000 RPM) to whatever you desire (within mechanical limits of the turbo and engine).