overboosting with new tial 38mm

[gnray76]

I had an ATR wastegate before I couldn't all of sudden go over 10psi before the wastegate bleed off, opened to find spring was broke 3 place's.. well I replaced with new TIAL 38mm ... my MBC (manual boost controller) is closed during this. looks like a air line regulator... buries the boost on gauge with just a hit of the gas pedal.. now Ive tested vacuum running at a steady 16 inches of vacuum. the wategate top port holds vacuum, and side bleeds the vacuum off right away when pressurized. now if not mistaken the side port goes to atmosphere and top port goes to the boost gauge?? I also did not start out using the original banjo fittings, I used a brass nipple fitting for top and other was running from turbo housing through a earl steel braid line. which has been removed and installed the original fittings that came with the TIAL, but has not been run since last night to frustrated... at work...

 

[gnray76]

the TIAL has a 1 bar spring

 

[TR Custom Parts]

Try it like this.

 

[Sinister86GN]

a smart quote
"Ball and spring boost controllers are installed in the boost line running to the bottom of the gate. They control boost by interupting the path to the gate until a certain pressure is met. The top of the gate is left open.

Regulator type boost controllers are connected to the top of the wastegate, with a boost line running directly to the bottom of the gate as well. The regulator adds an adjustable amount of pressure to the top of the gate, much like changing the wastegate spring would. Of course it is more convenient to adjust the regulator than to change the wastegate spring"

 

[gnray76]

hey TR thank you for the diag. my set up is the same but missing the T the line from turbo goes right to side port on wastegate, I will add in a T and go from there...

thanks again, ray

 

[gnray76]

sinister, I understand the physics of how both regulators work, top sounds of a electronic boost controller and lower paragragh is the regulator type or manual. It was the set up I had before that I just placed the same on the new, and wasnt sure if I was doing this was right way... after overboosting happen again, I had switched the lines an it also did the same, so I gave up instead blowing things up, I had to stop and ask questions about, cause also did not come with any installation papers...
thanks again, ray

 

[gnray76]

still having same problem.... even after reroute of lines with all new vacuum lines.

 

[pacecarta]

try running a hose from turbo to the bottom (base) of the gate tuner style (top port open to atmosphere) , it should only boost to the spring pressure in the gate if it still overboosts than your spring in the gate may be too stiff or you have a stuck gate valve


also make sure the gate is installed correct , on the atr dp it can be installed backwards (yes ive seen it done),

 

[gn4u2c]

Sounds to me like you need to go up in gate size. you may just have it adjusted to tight but I have run across this more than once with smaller gates. try a 44 or 46mm

 

[DCVING 6]

try running a hose from turbo to the bottom (base) of the gate tuner style (top port open to atmosphere) , it should only boost to the spring pressure in the gate if it still overboosts than your spring in the gate may be too stiff or you have a stuck gate valve

I run my Tial 38 on an ATR pipe with the top port open and it works flawlessly. I am not using the stock solenoid, I am using the one with my MAF PRO setup though. I would snap a pic of how mine is setup, but my car is still in pieces.... come to think of it, I should have written it down for myself before I took it apart, it's been a while.

 

[justinsane]

air line regulator style boost controllers are nothing more then a adjustable air bleed and should be vented to atmosphere. these type of controllers are not consistent and should be avoided. a ball and spring is a much better choice, lets however take the controller out of the equation, run your bottom port on the tial to a vacuum source other then the turbo, such as the intake manifold ect ect the top port should be left open. now drive the car and watch the boost characteristics, does it build smoothly and then hold? does it spike and then fall off a little? after you have done this let me know. by the way here is a video i did showing how some different controllers work and the pros and cons. if you search my other channel videos you can see my dual stage prototype i made a while back and how they hook up as well, while your controller isnt one of mine the principle of how they connect may give you some ideas. my current designs differ in appearance from these early prototypes in the videos but the way they work is exactly the same.
ps this is not a commercial to sell you my product , its merely for informational purposes.
[YOUTUBE]http://www.youtube.com/watch?v=yJbQRhtagvM[/YOUTUBE]