Standard high boost is around 0.65 bar. fuel cut comes in around 0.85 even small mods like de cat, fmic ,air filter relocation and exhaust will give boost creep you could either go external wg and get an ebc (expensive option) or get an adjustable actuator and a mbc or you can pick up a good second hand ebc for not very much money and take it up to 1 bar and get your afr,s checked