Originally Posted by GARETH T
the wastegate actuator wont creap with a bleed on system (air to air) so the wastegate is bypassing any air, so the turbine housing gets it the exhaust flow through it
with a bleed off system (amal) the wastegate can start to creep as pressure in building in the compressor site, slightly lifting the wastegate, slightly reducing the amount of flow which is flowing through the turbine housing
However, you can STILL get boost creep if the turbo's wastegate isn't of suficient size to allow sufficient bleed off when fully open, so don't expect it to be a miricale cure for T4s, which must have the largest wastegate penny and even be gas flowed to enable boost creep to be eliminated. As has been said, all air injectors will do is give more accurate boost control. Only problem is if they fail, then you get unlimited boost
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