cossy chris without meaning to offend ect, if the boost was at .7bar,,,,,

why did you touch it, the tuners that set your car up set it for the correct boost levels, changing it cause another mate has more on his seems a bad idea

you might have a lower boost level cause the engine is more efficent and cosuming more air than your mates hence the boost, you might have a boost leak AT your boost gauge, i know a mate whos boost was set up with a leaking boost gauge, he never knew and must admit that was one fucking quick stage 1

when he lost all boost we checked the gauge and the reconected it as the gauge had disconected he was actually running 27psi , the guage was giving a false reading

so my advice is dont touch unless you can check the fueling to confirm