What boost should I be I seeing on a cs4 z20let with the usual mods (vxr turbo intercooler etc)? Im thinking 23psi and holding 18psi in all gears?
At the moment Im making 15 and holding 13 in 1st gear, 17 and holding 15 in second, 19 and holding 17 in 3rd, in 4th and 5th its making 23 holding 18 any ideas what would be causing it?
Was thinking the actuator might be knackered, can't see it being the turbo would of thought it wouldn't be holding the boost in the higher gears if that was the case.
Thanks for any help Dan.