Sorry dude, just seen this.
Not running an mbc now, don't think its the ecu cutting the boost, because when i was running the mbc as well, the car was quicker lower down.
It still wasn't boosting very high 13psi(ish), with the mbc on. It feels like its got more now, higher up the revs, but has a lot less lower down and the boost doesn't feel stable.
Its not jerky, but more like it hesitating.
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