R33 Problem With High Boost??? Help

[gdg079]

I installed a bleeder valve boost controller, and when i get up around 12 psi, the car shudders and jolts and won't boost any higher, any thoughts on what it might be???

Its only running around 145 kws at the wheels

Its a 1993 R33.....

[Fly_With_Sky]

probably the fuel cut kicking in...lower the boost to 10psi and see what happens.

running 10psi would be safer for the stock turbo. Also, the higher you boost the richer the car runs with std management in order to protect the engine. So you may be making similar power at 10psi when compared to 12psi...

[R33S2]

Are you running stock intercooler as I've been told they dont handle above 10psi, not enough flow, so it would be as Fly_with_sky says.