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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Jb4 g5 to g5 iso , thoughts and questions



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      04-24-2013, 02:07 AM   #1
oshusttoley
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Jb4 g5 to g5 iso , thoughts and questions

, I def feel more power in the lower rpms now that I made the jb4 iso. I have a tial bov and I was boosting around 15 on g5 and the bov was really loud when blowing off. Now that I'm iso, it seems like it barely goes off specially at low rpms and when it does go off, it's super quite now. Has anyone else had this problem? I'm not getting any codes and my logs look fine that I can tell. Now with this lag fix... I set mine to 80 which is default and is fine, now it says when you go lower number its more lag but less rattle, when I lower mine past 60, I get super loud wastegate rattling. I thought it was supposed to do that if I went higher In numbers, not lower? I'm just afraid that it seems like my bov barely goes off and I don't want that extr air going the opposite way in the system and screwing up the turbos anymore then me tuning my car also what I hate, is my car takes longer to crank after I installed the jb4, I assume my hpfp is on it's way out? Thanks again
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