2G Overboosting help

[Dawson159]

So yesterday was the first day I got to drive my Eclipse more than 2 miles at once and I noticed my boost gauge was reading 25psi and I was like oh shit so I pulled over and me and my friend tuned down my manual boost controller all the way down it read 12psi which made sence because 10psi is stock and 2psi is added when yo remove the boost solenoid?( correct if I’m wrong)

Well I drove it for about 2 hours just happy that I can finally drive it then as the night went on the car started performing worse and worse so we checked the boost gauge again (it was night time and the lights aren’t wired in yet) and I was hitting 25psi again so we thought that maybe the controller turns itself up but it was still turned all the way down so I looked it up and I’m pretty sure I have boost creep because I have a 3inch turboback exhaust which is probably causing it.

I have a freshly rebuilt t25 turbo in it and I don’t want to ruin it but I also don’t want to drop the turbo to make the wastegate bigger so I started researching and in my Chilton manual there is a diagram of the turbo and there is a little hole in the turbo next to the intake (I’ll take a picture) that is just open and the picture in the Chilton says it T’s off of the line that goes into the wastegate and that line is the manual boost controller.

So I’m totally lost rn Is there a vacuum line issue or is my wastegate just not big enough and I’m going to have to drop the turbo I’m not very mechanicaly inclined and this turbo wastegate stuff is kind of confusing to me so what do you guys think is the problem

Thanks in advance if you read that wall of words

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[chrysler kid]

Has anyone thought to mention that a t-25 wont generate 25 psi at redline? I ran a full turbo back 3 in with a t-25 and the psi would spike to 20 and then drop after 5k rpms to 12 psi.

Hoook it up straight to the wastegate like shown above, you shouldnt get more than 12 psi or something is wrong.

Thoughts?

I said that earlier. I'm trying to be polite

 

[Dawson159]

yes

I took it for a pull and everything seems to be running right I’m pulling at 10psi so I think it’s fixed

 

[jakk220]

Glad to hear.

 

[boostdawd]

Is it possible u had the boost controller hooked up incorrectly?

 

[jakk220]

Is it possible u had the boost controller hooked up incorrectly?

He said that it was hooked up incorrectly and that routing the boost source directly to the wastegate (just running wastegate pressure) fixed it.

 

[Dawson159]

Is it possible u had the boost controller hooked up incorrectly?

Yah I had it in backwards I’ll put it back on correctly sometime in the future

 

[AllanL]

 

[Tywire]

You boys got any thoughts on installing a boost controller without having access to tuning soft ware? I want to hook up a boost gage and controller on my 90 laser rs i just dont want to overlook any difficulties that I might not be equipped to deal with before I do.

Thanks.

 

[Tywire]

You boys got any thoughts on installing a boost controller without having access to tuning soft ware? I want to hook up a boost gage and controller on my 90 laser rs but dont want to overlook any difficulties that doing so may create... What could go wrong?

Thanks, Fellas.

 

[chrysler kid]

Try searching around. That topic has been discussed multiple times.