Feb 28, 2025 · 5. Carbon Build-Up. Carbon build-up in the intake valves is another common problem, particularly in direct-injection engines like the 320i’s. Symptoms may include: …

Jun 3, 2016 · BUILD: How to make your 320i into a beast. This will put 328s in your mirror as you pull up on 335s.

Feb 28, 2025 · Carbon Build-Up: Over time, carbon deposits can accumulate on the intake valves, affecting airflow and engine efficiency. Sensor Failures: The system relies on various sensors …

Apr 8, 2022 · I know the 328i and 320i have the same engine, yet the 328i comes with 60 more horsepower. I think an ECU tune like BM3 would probably work perfectly well; a lot of people …

Aug 1, 2017 · Make sure your ignition timing can handle even the stock turbo with the jb4. If you're running more than map 5 on the 320i be careful and make sure you're ignition timing …

Jan 21, 2025 · Carbon Build-Up: Direct injection engines, like the one in the E90 320i, are prone to carbon build-up on intake valves, which can affect performance and fuel efficiency. The …

Jul 24, 2018 · So the questions, which are the best performance upgrades for the 320i? I hear BM3 is the next best ECU tune, but how much of a performance upgrade over a JB4 is it in …

Feb 14, 2019 · I purchased an '82 E21 320i from an old highschool friend a couple years ago. It has gone through some change since my bestfriend and I have been working on it as much as …

Jun 28, 2011 · Hey guys, so as it is a pretty boring day for me today, I decided to create a thread about my E36. The progress hasn't been very fast, but still, there is some, so comments are …

Dec 30, 2023 · I bought a non-running 2007 320i with the intent of turning it into a track car. It will stay street legal and mostly low-budget. There are no power adders available for the N43 so I …