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My 135i build just finished and im on PS2 lower high flow turbos. Im currently sitting over 500rwhp according to my tuner. Once i go Port Injection in 2 weeks, i should be somewhere between 600rwhp to 700rwhp. My turbos spool really fast id say by 3000rpm im hitting boost extremly fast. I think it has a lot to do with your tuner. Im currently tuned with JSR Tuning. I have 3 maps. Map one is low boost street map on 93 octane, Map 2 is High Boost Agggressive Track Map (my car is a track car not a drag/street car) E30/E85, Map 3 is Low Boost E30/E85. My car continues to surprise me once ive put these PS2s. Once you fix the boost leak id talk to your tuner and get some maps for your tune to work with the PS2s. You should be hitting boost by 3000rpm pretty hard.
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