Wastegate Actuator And No Need for Boost Controlle

[FRM3]

A number of posts on the SRT boards talk in detail about using a new and higher pressure wastegate actuator to improve performance and hold higher psi to shift points in all gears.

Some go on to say they do not need boost controllers in that with the wastegate actuator set at 14 lbs. they have all they need. Any opinions, experiences or comments?

Here's a link to what they seem to be buying:

http://www.turboneonstore.com/agp_wa...e_actuator.htm

[Gear_Head]

We have had one installation tried on a GT cruiser for this waste gate actuator. There is a fit issue with the geometry of the SRT-4 Bracket not fitting correctly on the GTs turbocharger. The installer could not get it to work properly......

[divots]

You might want to try and look here:
http://neonparts.net/pt.html

They claim that their Rage Wastegate Upgrade (not the same as the AGP one) will work on the GT, but I don't know if they have actually test fitted one yet. I believe the SRTForums folks stated that this unit also has a tighter spring than the AGP WGA.

Aloha,
Mark

[Punch]

I thought i read on the srt forums of someone who did the brake spring mod to there wastegeate and eneded up wrecking the motor..... sounds like a mod i'm staying away from....

[3BarBoost]

The spring mod, bending the wastegate bracket, crushing the can, and heavier internal spring all do the same thing (the RAGE and AGP cans) - raise the minimum amount of boost before the wastegate can open regardless of what the wastegate solenoid wants to do. The reason this works better than a MBC is the pressure upstream of the turbo also 'helps' open the wastegate, which bleeding off pressure to the wastegate can doesn't address.

However, like anything else you can go too far - the wastegate is there to prevent the compressor from going nuts and making so much boost the engine blows. If you don't know what you're doing, you'll end up like the dude at srtforums...

[FRM3]

The wastegate I am aware of is set for 14psi. This seems to be within a safe range assuming it really is 14 psi. If, in fact, it is 14 and works, would code issues be eliminated?

[3BarBoost]

Code issues have to do with the boost overshooting the goal. Without the solenoid controlling the wastegate, you will still overshoot - sometimes badly.

[Exhaust Depot]

FRm,

You are correct. The only problem with using only a AGP waist gate actuator is that the boost will tend to spike alot. An electronic boost controller likt eh Greddy Profect B will remidy this, it will also allow you to hold higher boost levels to redline.

[jrk516]

Don't listen too closely to me, as I'm still learning the technical details of turbos, but for those that are interested, TurboXS.com has a kit with a wastegate actuator, boost controller, and tubing necessary. It's for the SRT-4, but I would imagine you could make it work.

For the record, the only mod I've done to my GT is a ram air Good Hood and AirAid intake, which I, uh, modified from my old 2001. It was my first run, but I ran a 15.68 at 91.91 with it. Does anyone know what a stock GT Manual runs?

[PVO PT]

I ran a 15.10 ish all stock cant rember the mph