it depens on the condition of your internals. like for mine, all wear parts was replaced around 1K inclusive of timing belts. it was all worth it as now it feel reborn
i current using this 35mm thai HKS wastegate, the boost can be adjust from the top screw of he wastegate.
but how much can i go? now i had tighten it up to 1bar only, the screw was 50% in. how much can this bov...