so whats the deal with these upgraded wastegate actuators?

Blitz and Jun both make them for example... Would these be the same as simply adjusting the stock one by turning the rod? etc? how do these come into play regarding tunes, etc?

Anybody have any insight on these? Yes I know theyre expensive JDM parts, but what do they do in theory regardless of cost?

 

The actuator has a spring of a certain strength in it, which basically opens at a certain boost pressure. You can make it open later but adding more 'preload' to it, but at some point, the stock spring is just too weak to keep the flapper shut to hold more boost.

So you get an upgraded actuator with a stronger spring that allows the turbo to create more boost.

The stock actuator is rated at about 11psi, and the boost control system allows it to run more.

FYI, I've heard Garrett is developing an upgraded actuator that should be rated around 17psi-20psi based on Eric Hsu's blog. I guess it'll come out in a few months.

 

^^ good answer

Just FYI, Forge makes one as well: http://www.forgemotorsport.com/conte...duct=FMPACEV10

I've been looking at that one because of the lower price.

 

from what i have seen it helps you hold boost much better

 

It's a good mod to increase the boost you will hold but keep in mind that the stock turbo will run out of flow starting at 5500 RPM's and taper to 19 PSI at 7500 no matter what actuator you use. I had my car dynoed before and after with similar low rpm Boost levels. The Forge Actuator let me gain a significant 15-20 whp in the mid range due to increased boost but was almost identical from 5500-7500 due to the stock turbo's flow restrictions. So while it didn't help my peak HP numbers , the mid range power was up quite a bit and it feels great on the street.

Once my new turbo goes in it will help hold the boost all the way to the rev limiter.

 

IMHO.... the forge is best bang for the $

The Blitz and Jun ones are very over priced.

I had a Forge WGA on my VIII... it helped out big time for holding boost to redline w/ a TME turbo.

I have a Forge WGA on the FP Red on the X, and once it gets running (no telling when that will be) I can give you some better feed back on the "X" platform.

Like hiboost said... no matter what WGA you use... the stock turbo is limited in flow.

-Chris

 

in a sense you could use a MBC in place to an aftermarket WGA. but i have seen most tuners prefer the stock boost solenoid, so the WGA looks like what i will be picking up....

on a side note like op asked, can modding/tightening the stock WGA net the same result as the aftermarket forge?

 

Does anybody know how difficult it is to install a WGA?

 

Modding/tightening the stock wastegate helps a little but isn't as controllable as the Forge unit. Too much preload raises minimum boost to unpreditable levels and it still tends to taper in the midrange due to the weak spring pressure.

If you have taken the WGA off before it can take as little as 5 minutes assuming the car isn't hot. Removing all the heatshield bolts takes the longest and moving the heatshield out of the way without removing it from the car completely is the way to go.

 

if i pick this up, can i just slap it on? or do I have to fiddle with it?

 

I've been searching about changing the stock IX (yes I know this is a X section) waste gate for the past few hours. I really want to kill my taper. I'm running a mbc at 28 psi and tapering to ~20 at redline. Some people have gotten better taper with ecu controlled boost(tapers to 25 psi), but wouldn't it be better just to start at the source, the waste gate actuator?

I was thinking about the FP 25psi actuator...

 

Even if u keep stock boost levels, can you still pick up some hp in the mid range? Ive been thinking about doing the wastegate mod, but i would feel much safer just replacing the entire actuator. Peak boost wouldn't change, but it wouldn't taper down as much correct?

Is this a direct bolt on, or would it be in good faith to tune it or at least have a boost gauge to monitor psi?

 

I just found the spring mod. I don't know if peak boost will change or not, I imagine it will tho. I'm just saying because I don't have any experience doing this yet. I'm gonna go get a spring and turn down my boost a bit and see what it does.

If this doesn't end up working that well, I may just spend the ~$130 on a FP actuator.

I would not do the spring mod or any different WGA's without having a boost gauge, or a MAP sensor to log boost. The X's can log boost, you just need a tactrix.