I'm running a 4x4 saff with a stage 1 chip, green injectors (not sure which, they were there when I bought it), -31 and a standard turbo.

What sort of boost can I run without it going bang?? It's running between 15-16 psi at the mo, I know this is about right for the chip but if I upped it, what bad things would happen and how quickly??

The engine was rebuilt about 4000 miles ago so I don't really wanna have to go through that again.

Cheers