Unfortunately, the 135i and 335i powered by the N54 received open differentials from BMW. It’s a serious limiting factor for those looking to make more power and/or track their cars. A limited slip differential is an excellent mod to help put more power down. In this guide, we will discuss limited slip differentials (N54 LSDs)…
For the most part, this is a similar post to our N55 E Chassis MHD post. However, we split up the posts since the E and F chassis N55’s use different apps from MHD. Additionally, the F chassis N55’s are a bit more capable given the EWG design as opposed to PWG. That said, some…
This is a question that comes up often. What is the max boost the N20 stock turbo can handle? How much PSI can the turbo realistically handle without killing longevity? These are valid questions, however it’s not an exact science. Regardless, in this post we will lay it out as clearly as possible. If you…
Though bootmod3 (bm3) is a newer flash tuning option they have quickly become one of the most popular BMW tunes. Pro Tuning Freaks bm3 offers a web interface and mobile apps for simple flash tuning. Bootmod3 also offers a handful of off-the-shelf flash maps loaded with cool features. If you’re in the market for a…
Charge pipes are a common discussion on turbo BMW engines. The charge pipe (CP) is partly responsible for carrying charge air (or boosted air) to the engine. Unfortunately, BMW’s N55 engine uses a plastic charge pipe. The N55 charge pipe is prone to cracking and popping off at higher than stock boost levels. It’s not…
Previously, we wrote a post about modding BMW N63 engines to make 500+whp on stock turbos. These are already impressive results. However, that’s simply not enough power for some N63 owners. That’s where N63 and N63tu upgraded turbos come into play. Although, upgrading N63 twin turbos does come with additional risks. In this guide, we’ll…
Alright, this is a tough article to write after we’ve written so much of this content for turbo BMW engines. The N52’s performance potential is often overshadowed by that of the N54 and other turbo BMW engines. When it comes to N52 performance mods, many will simply say, “buy a turbo BMW”. We’re here to…
If you’re interested in purchasing an S55-powered M2, M3, or M4 reliability is an important aspect to consider. As M cars, they’re certainly not cheap up-front. In this article, we will cover a few common problems with the BMW S55 engine. However, please keep in mind – this is in no way an exhaustive list…
We’re finally getting around to writing about upgraded N54 inlets and outlets. Oddly, they’re mods we often overlook despite running upgraded inlets and outlets on our 2007 335i. Inlets and outlets are also some of the best mods for the N54. Turbo inlets are the intake pipes that run from the intakes to the turbos….
These posts are challenging to write because best is subjective. Spoiler alert – we’re not going to say one year 335i is better than another. We’ll break down the differences by year and allow the reader to decide. How to Pick the Best 335i For You Before we dive into a year-by-year breakdown let’s touch…
We’re finally following up on our general MHD post. This guide will go more in-depth on BMW N55 MHD E series flash tunes and expected power gains. All E series N55s use PWG. However, some F series are also PWG rather than EWG. The F series uses a different MHD app, so we will write…
Some refer to the BMW E90 (E9x) 3 series as one of the last great true drivers cars from BMW. The preceding E46 chassis was so good and left the E90 with big shoes to fill. Initially, many didn’t believe the E9x chassis to be as good. However, with newest E46’s nearing 15 years old…
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