I had south coast mitsu put on the dejon boost controller and they put it up to 22lbs of boost. This is my first car with a turbo and everyone I talk to is amazed at the number. I am pretty sure that stock GSR X is putting out 14 lbs so the increase doesnt seem to overwhelming. I wanted to get some info on longevity with that much boost if it is a good idea or if the motor can handle. My buddy in an 04 sti says he wouldnt go that high even with all of his mods and tunes. Any advice/suggestions would be greatly appreciated.
I also have the injen cold air and the greddy full cat. Maybe a tune would be appropirate?

 

Someone correct me if I'm wrong but factory boost is 22.75 psi. Alot of people are setting theres around stock, I have mine set to 24 psi and it is running fine. So you could probably turn it up a little if you want.

 

^Yeah the 14psi is the boost in the higher rpms because of the smaller turbo and stock wastegate. it spikes to around 22-23 psi stock though in the lower rpms. unless your car holds the 22psi to redline then they have more done than just a boost controller. which would also be fine just make sure you have the supporting tune to go along with it!

 

stock boost is at like 17 is what i was told cause when i changed mine to 23 it pulls a whole lot more

 

what would the tune do for the boost increase, more WHP? or is it for the safety of the engine.

 

A 23 psi spike is stock, tapering down to 15-16 stock.

 

Tell your friend this is not an STi. Stock this car hits about 23-24 psi and tapers down to 16-19 psi depending on the vehicle. What you want to do is the free wastegate mode to make it hold anywhere from 20-22 psi at red line.

 

Mine peaks at 25psi and tapers down to 21psi @ redline after ecutek tune. I use gizzmo ebc.