![]() It's also important to note meth injection will play a role as it acts as supplemental fueling. Pump gas will be a bit easier on fueling, however stock turbos can't make over 425whp on pump gas. Running much more than E30 or E40 fueling is going to cap the stock LPFP quickly. That said, let's lay out the fueling limitations of the stock N54 system: If you intend to push the stock fueling limits keep an eye on HPFP and LPFP pressures, fuel trims, and AFR's. ![]() Data-logging is an important and valuable method to keep an eye on fuel flow. Some of it comes down to the health of your stock LPFP, HPFP, and injectors. *Fueling limitations will vary from N54 to N54 even with the same mods, boost, fuel, etc. ![]() This will be a quick overview, and we'll add to it throughout the post as we discuss each of the mods individually. *N54 500whp JB4 Integrated Port Injection Kit Pictured N54 Stock Fueling Limitationsīefore diving into any upgrades let's discuss the limits of the stock fueling system. Additionally, we will discuss a few of the best options on the market for all N54 fueling mods. 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 then some. This post will serve as a complete guide to N54 stock fueling limitations and upgrades available. ![]()
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March 2023
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