Stock T25 Wastegate Pressure

[isantop]

I've found a couple of source that suggest it's around 9 psi, but they all say "I think" or something. I've also found a couple of other sources that quote lower numbers, like 7 or 8 psi.

Basically, one of my POs removed my car's BCS, and has a vacuum line hooked up between the port on the compressor housing directly to the wasegate port (running at WG pressure). I't my understanding that in general, this won't produce dangerous boost; in fact, it should be lower than stock boost.

What is the WG pressure for the stock T25? I understand there'll be a couple of pounds drop from the compressor housing to the intake manifold.

What's going to be my best option for returning to stock boost? Finding a stock BCS at a junkyard, or going with an aftermarket boost controller?

Apart from a pod air cleaner, the engine is totally stock (apart from the aforementioned missing BCS).

 

[T is for TURBO]

Mine was 12. But your mileage may very as the spring can lose some of it's tension after many heat cycles and years of use.

Get a MBC and don't go above 15psi. Every t-25 I have ever run died shortly after running higher than 16psi+

 

[isantop]

Mine was 12. But your mileage may very as the spring can lose some of it's tension after many heat cycles and years of use.

Get a MBC and don't go above 15psi. Every t-25 I have ever run died shortly after running higher than 16psi+

It's my understanding that a T25 doesn't even have enough flow to sustain boost at high-RPM at stock boost; why would I turn it up?

Eventually, I plan to upgrade to a 14b or a T28. Nothing crazy, but with enough flow to make up for the T25's lack at high-RPM.

 

[T is for TURBO]

It'll make power up to around 15-16. After that, nothing.

I thought I would be happy with T-28, too. And I was... for a while... now look at my profile.

 

[JusMX141]

No two T25 actuators will test the same. One turbo may make 9psi on wastegate pressure, one may make 11. No way to pinpoint it for sure.