Recently I have upgraded my stock turbo with the ATP3071R. Kit has a nice fit and finish, but I am having a problem with any sort of boost control, using the stock bleed control setup. I am currently running a 1.0 bar spring (for breakin purposes only), but the stock controller isn't working anymore. I have one small issue that may effect the controller, but I wanted to ask here first.

Anyone running a larger turbo with the stock controller, and using the utec to control boost?

Second question relates to the small issue I have. I changed intakes from the hks rs to the buschur pipe. The buschur pipe doesn't have a vacuum fitting for the vacuum side of the controller. Could this be affecting the solenoid? I am not too familar with how the actual controler functions other than it acting as a bleed from the source to the wastegate.

BTW can't wait until I change the spring in the tial wastegate. Did a few logs and my previous stock turbo maf reading was 1600hz at 22 psi, and the new turbo maf reading was 1700hz at 15 psi. Should be fun!

 

Forgot something. Maybe TXS or Jack can chime in on this one.

I am hearing some rumors that TXS is working on an acutal solenoid that will control actuall boost. Similar to a profec b or apex unit. Anyone else heard about this?

I would think that this may plug into the extra unused line in the map selector switch plug, but maybe I am wrong on this.

 

Yes, you are correct, they are working on a boost control solenoid, you also have the option of running a GM Boost control solenoid in place of the stock one if you need something now..

 

go avcr john, you'll love it. We're going to meet up soon so i'll give you a call.

 

I spoke with Andy, and he told me about it. I am more interested in trying to let the UTEC handle it, but right now, it won't. I have no boost control at all, but I am only running a 1 bar spring in the tial anyway. I just don't want to have to change springs to change boost levels.

 

are you sure you routed the wastegate lines in the correct place? I think the tial wastegate has two nipples. I'm not sure which one it's supposed to be on but i'm sure it's only going to be one that's gonna be connected.

 

I actually followed your post on the GM boost control solenoid setup, and understood everthing you had written. The only issue is why change from the factory one? I understand the mbc safety issue, but why use a GM part? The only thing I could see was that the GM part had an inlet and outlet for boost. As I can recall, the mitsu part has a vacuum in signal, boost/vacuum signal from the wastegate/turbo, and some sort of bleed hole. I didn't actually find the bleed hole, but I have to assume there is one.

Still the question remains as to why you would switch to the GM part.

 

I did route them correctly. The tial has an upper and lower connection. The upper connection is used with an electronic type controller. If pressure is applied to the top port, the lower port needs the spring pressure, plus the upper pressure to open the valve. I tried to play with the upper to encompass a boost signal and the abc, but the results were sparatic.

I just can't understand why the stock solenoid can't react to the new setup.

Another issue could be the vacuum hose length from the turbo to the wastegate. In stock form it is around 6 or so inches, and now is around a foot and half to two feet.

 

The GM boost solenoid is WAY better than the stock one on our cars. I use it with an AEM EMS and it is kick ****....

 

Well I found this diagram:



Does anyone want to chime in on the part number? I may just buy one to give it a shot. A pig tail part number would be nice as well. Thanks.

 

Do a search for the GM Boost solenoid, I posted the part number and pigtail info some time last year..

That looks right for an external wastegate with the vacuum assist on both sides of the diaprhagm.

 

In response to the post about why the GM solenoid is better.. Its because of how it works, instead of a bleed system like the stock, its a restrictor system... 100% duty cycle will close the solenoid 100% of the time, 0% will allow the full pressure from a vacuum source to go to the wastegate.. Basically alot like how an MBC works. In my setup, I have an MBC plumbed in parallel with the solenoid should it seize, it will bypass the the solenoid through the MBC set for a arbitrary maximum pressure (24psi on my car)

 

Since i have the info handy. I will hook you up with the part #s for it.

G.M Boost control Solenoid part# 1997152

G.M Pigtail for the boost solenoid part# 12102747