This page is dedicated to BMW Mod Guides. Guides range from 500+hp N54 bolt-ons, N54 port injection, S55 turbo guides, B58 downpipes, and plenty more. Check out all of the awesome BMW turbo engine performance content.
Pro Tuning Freaks (PTF) bootmod3 flash tunes are a popular option for the newer F and G chassis BMW’s. Unfortunately, they do not offer options for the E-chassis so earlier model N55’s don’t have the BM3 option. PTF BM3 offers an excellent web interface and mobile app for easy N55 tuning. Bootmod3 also comes with…
The B48 in 20i and 30i models is looking to be an excellent engine thus far. It’s reliable, efficient, and sporty. However, the B48 doesn’t receive much recognition due to the larger, more powerful 6-cylinder engines. That said, we’re likely writing this article too soon. There is still a lot of time, development, and testing…
Water methanol injection is common subject in the BMW tuning world. We touch on WMI in several other B58 posts, but it’s time to finally tackle the topic in full. Methanol injection comes with a handful of benefits, but it’s not without risk. In this guide, we discuss the benefits, risks, and power gains of…
It’s about time we got around to writing a water methanol injection guide for the BMW N54. WMI is an excellent source of fueling for the N54, and comes with the added benefit of cooler intake temps. However, there are also some risks and things to consider prior to opting for methanol injection. In this…
The S63 is already a highly capable engine even with the stock turbos. We wrote about the S63 stock twin turbos abilities in our guide about building a 700+whp S63. However, it’s simply not enough for some. A set of upgraded twin turbos has the ability to push the S63tu M5 & M6 into a…
This post will serve as a complete guide to N54 stock fueling limitations and upgrades available. What are the limits of the stock N54 fueling system? At what power do N54 LPFP’s, HPFP’s, or port injection become necessary? How does E85 factor into all of this? We plan to answer all of these questions and…
We’ve written guides for many N54 bolt-on parts, but always overlook exhausts. That’s in part due to the underwhelming performance gains when compared to a tune, catless downpipes, etc. However, aftermarket exhaust set ups do have their benefits – sound and looks. In this guide, we will discuss some of our favorite exhaust set ups…
It’s crazy that BMW hasn’t learned at this point. Maybe they simply do not care. Charge pipes (CP’s) are a common failure on nearly all turbo BMWs. Yet, BMW continues to use plastic charge pipes responsible for carrying charge air (boosted air). Generally, the charge pipes hold up OK on stock boost. However, tuning for…
Bootmod3 (bm3) off-the-shelf flash tunes are quickly becoming one of the most popular BMW tuning options. The bm3 tune – from Pro Tuning Freaks – uses a mobile app and web interface for simple flash tuning. Their B48 tunes also offer a good selection of OTS flash maps loaded with great features. B48 owners in…
As a newer engine, B48 charge pipe (CP) failures appear less common than many of the other turbo BMW engines. However, this likely comes down to many being under warranty with few modded. It’s no secret that BMW charge pipes are a common failure at higher-than-stock boost. In this guide, we will discuss a few…
Factory charge pipes are a common failure point on many modern turbo BMW engines. A charge pipe (CP) is in part responsible for carrying charge air (boosted air) to the cylinders. Unfortunately, BMW decided to use a thin, weak plastic charge pipe. The N20 CP is prone to cracking and ultimately failing at higher than…
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)…
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