Ille start by listing my engine mods.
tpr2 big valve head , ns1 cam , sprintex sc on standard pulley , 550cc injectors , larger intercooler, 3in intake , 421 ported catless headers , sneedspeed ported manifold, screaming demon coil , range colder brisk plugs and 10mm wires , colder thermostat, Detroit tuned bpv , intercooler sprayer and remotely tuned by Adriancl. The car pulls like a freight train and has 0 issues what so ever and it currently will max out at usually16psi though cold days I can see 17lb.. I just ordered a 62mm pulley for my sprintex sc as I'm looking for abit more power as it never ends. But what's the max boost levels the stock ecu and map sensors will allow ? Obviously I will retune according to how much boost it makes but I'm hoping for about 19-20lb psi ..I swear I've read that these r53s run into problems once you start making high boost and I swear I read it was like 20lb that happened at..
if I'm making 16psi now on standard pulley what should I expect on the 62mm ??

 

The T-Map sensor has a limit of 20.9 (according to my logging software.)
Anything over that just isn't read with the stock ECU.

The 64mmm pulley made about 17.5-18 psi with my setup at the time, "your mileage may vary"....
but... I pushed 20 psi on a stock bottom end with no issues at all.

 

dang. I hope it doesn't already have a 62mm . Though seller claimed it was the standard pulley . Do you know the standard pulley size?
what do I do if I start making over 20lb of boost ? Upgraded tmap ? trade which one do I need ?

 

I edited my post, the 17.5-18 psi was with the 64mm pulley.
The first units only had the choice of 69mm (stock size, everyone called them 70mm), 64mm and 60mm.
I was able to see 19.5-20 with the 60mm and my engine at the time. (Stock Cam, ACG, Header, OEM CAT and RMW BVH), But was only seeing 15-16.5 with the 69mm pulley. Don't forget, Boost numbers vary with the consideration of your other parts, power numbers are really the important ones.

Honestly, you probably won't see more than 20psi with the Sprintex, and I don't think the ECU can be adapted for anything than the OEM T-Map sensor, which should cover the Sprintex.
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lol I hope so because I'm close in cold weather already on the 70mm pulley and just ordered a 62mm... so what do people do with turbo and high boost ? They must use a different ecu then huh ? I know my boost reading are accurate as I've logged them with inpa and they exactly matched my boost gauge that I too replaced 2x because I was chasing down belt slip issues one time . But on low 60degree night like tonight I can see 17psi for most of the pull , even with all my so called boost dropping mods that's I've never lost a lb of boost when installing..well , if I boost over 20psi lol what about a blowoff valve because upgraded ecu I'm sure is out of my realm of affordability.