My 97 gst has 45k
I tell you one thing I did. Now keep in mind it is not god for your turbo to do this, but I had ALREADY bought a 20g and was knew it was sitting in my house waiting to go in.
I turned my t25 to 19psi and ran it for over 1 month like that. I had NO fuel cut and it felt strong when it was in its little powerband. The tq was a good bit more and I had fun with it. My mods at that time were:
Wires & Plugs
GReddy Hard UICP & LICP
GReddy Type S
SBR MBC
BOOST GAUGE
GReddy Peakhold EGT
I had NO fuel or exhaust mods done yet and it ran like a champ. I even had checked the turbo when I removed it for the 20G and it was in great condition. Nothing out of the ordinary, the turbo only had 40k when I removed it. There is a dyno sheet on here where a buy turned his t25 up an made some good #'s. Just keep in mind...
THIS WAS MY SETUP AND I TAKE NO RESPONSIBILITY IF SOMEONE BLOWS SOMETHING UP BY DOING THIS.