It's safe to run over 14psi boost on stock twins.

[Ric]

Running your boost over 1 bar will not blow the turbos. Daily driving 18psi will not blow the turbos. Dynoing at 22psi on C16 will not blow the turbos.

Stock twins blow up just due to old age like every other turbo in the world that is 15 years old. Turbos that have been abused by previous owners in Japan (remember, imported motors are junkyard motors) will end their life alot quicker then ones that have been taken care of. Running stock boost or 18psi will not make them last any longer or shorter. The easiest way to make them last is to run a very free flowing exhaust system (and aftermarket y-pipe and downpipe), and to change your oil every 3k miles. Also I personally advise to run an aftermarket blow off valve if you are 5spd.

Please guys, lets stop the rumors. There are plenty of members on this forum to support the truth and to end this silly rumor.

Please sticky this.

 

[rakkasan]

Ohhh the drama. The old flame bait trick.....

 

[Ric]

No flame. Just spreading the truth.

 

[tissimo]

The twin will die faster at elevated boost levels, but running 16+ psi for short instances wont kill them instantly.. but You will over spin the turbos and thus shorten their life span..

 

[Tim]

The twin will die faster at elevated boost levels, but running 16+ psi for short instances wont kill them instantly.. but You will over spin the turbos and thus shorten their life span..

I agree

 

[The Reaper]

the best way to not blow your twins is to go single LOL

 

[Ric]

the best way to not blow your twins is to go single LOL

+100

I should edit that in my post lol

 

[The Reaper]

hahahah its the truth

 

[Ric]

I'm not one to speak, I blew my single on 12psi


Ok I stretched the truth. It was defected from the factory and I still used it til it had no more to give. It's a 360* journal bearing turbo, the turbine side seal failed causing the thrust bearing to fail, leaving the shaft with 1/4in of front to back movement.

 

[The Reaper]

ouch hahaha

owell go out with a bang

 

[Ric]

Not quite a bang.. Went out with a screech of the compressor wheel rubbing the housing lol...

I hope the compressor is salvageable. Should be. I don't want to wait 2 months for precision to do their factory warrenty service, i might just have it fixed local. 2 months of downtime isn't worth $200 to get it fixed in a weekend.

 

[The Reaper]

oh i thought you were talking about an old turbo you had. you gt4088 is fried???

 

[Ric]

Yeah, it was bad out of the box... but survived 6 months til it finally got to the point where its undriveable. I figured by the time it was time to get it fixed i'd have another turbo, but I have since lost interest in making big hp, and now i just need something to drive lol