I have an 89 TII, BNR Stage 2 and a Greddy TVVC MBC. What boost should I be seeing with the boost controller set as low as possible? Stock boost is a little over 5psi correct?

 

It might be a little more with the BNR.. IN fact, stock boost on the S5 was more like 7 or so if I recall correctly.

 

Hmm, well my boost gauge is showing boost is hitting a tad over 5, probably 5.5psi. Im at roughly 2k ft about sea level.

 

that just means your WG is ported good. or you have a boost leak

 

Well it has been ported through BNR. Stupid question I know, but how does a well ported WG attribute to lower boost levels? Better flow actually allows all exhaust gases out rather than it getting backed up and still making boost?

 

yea thats about right. with exhaust and mods on a bigger turbo you would get crazy creep... but im pretty sure bnr does a great port job on the WG.

 

Maybe its the elevation?