GTR Boost Question

[JayDee]

I am new to GTR's(R32) and I have heard that removing the small restrictor (where the yellow band is) will increase the boost. It has been dynoed with 263rwhp and the speed shop tells me that the he expects that the computer has been reprogrammed because it is running a consistant 10psi boost and the rev limiter has been removed or raised (power run to 8200rpm and no cut).

1) There is no other boost control on the car that I am aware of so is it correct to assume it has been changed in the computer or could my 3 inch nismo exhaust, high flow cat and biggger dump pipes be causing the slight boost increase to 10psi? The car is otherwise standard.

2) If it is already running 10psi with the restrictor in what boost can I expect with it out. I have a boost guage on my Blitz turbo timer so hopefully that is accurate enough to read it if I do it.

[Penfold]

A stock r32 GTR runs 0.8 bar (~11 PSI). By removing the restrictor boost runs at about 0.95 bar (~14 PSI).