LS Swap Documentation

Start Here

New to the swap? These cover the big picture before you spend money.

Swap Guide: The Full OutlineWhat happens at each stage of the swap and where the detailed write-up lives. Read this first. BMW E9X & E8X Body Styles Explained: The Ultimate LS Swap GuideWhen people talk about swapping a BMW 3 Series, most of the time they are referring to the E9X chassis. The... LS vs LT Swaps in BMWs: Why the LT Might Be the Smarter MoveLS vs LT Swaps in BMW E9X and E8X Cars: Why the LT Is Becoming the Better NA Option The LS used to be the o... LSe9x Swap Parts ListThe complete LS swap parts checklist for BMW E9x and E8x: engine mounts, accessory drive, cooling, fuel, wi... LSE90 Swap Tutorial Video SeriesPlease see our 4 part series for a detailed view of swapping your own E90! Lse9x Swap Series Part 1 ...

Engine, Fuel and Cooling

Fuel System for LS Swaps in BMW E9x ChassisNote: This article provides a general overview of the BMW E9x fuel system and offers a few reliable upgrade... Accessory Drive InstructionsPlease Refer to your spacing - Truck, F-body, Corvette:  Applicable to non AC drive by omitting unused bolt...

Driveline and Chassis

BMW E90 Rear Knuckle and Hub Differences: What You Need to KnowBMW E90 Rear Knuckle and Hub Differences: What You Need to Know In BMW E90 models, rear hubs and knuckles a... LSe9x X drive Swap Front subframe fitment    Swap Basics: Driveshafts Driveshafts in a swap is a simple but necessary part that can come in MANY different forms. There are vari... Gear Ratio and RPM CalculatorPick a transmission or enter your own ratios, set tire, rear gear, and shift rpm, and plot the shift trace, per-gear speeds, and cruise rpm. Why the ZF 8HP Is Perfect for Your E9x LS SwapThe complete 8HP guide: picking a donor, adapter and converter, mounting, cooling, wiring, the TCU flash, and real power limits.

Wiring

LT‑Swap Wiring Guide for BMW E9x/E8x Chassis (GM E92 ECU)Chassis-side wiring for the Gen V LT swap with the GM E92 ECU: pedal, key-on power, fan, AC, fuel pressure ... How to Activate Reverse Lights on Your BMW E9X LS SwapOne common issue when swapping an LS engine into a BMW E9X (E90, E91, E92, or E93) is figuring out how to g... LSE9x Maxxecu LS Terminated Harness Install GuideMaxxECU Race LS Terminated Harness Overview The MaxxECU Race LS Terminated Harness is a premium, pre-assemb... LSe90.com Swap Wiring InformationThis information supplements the Holley wiring video. These are the major connections you will need to make... Swap Basics: Relays https://www.youtube.com/watch?v=iRa2U2cTj8c A relay is an electrically operated switch. It consists of... Swap Basics: Starter Wiring https://www.youtube.com/watch?v=kFsl5r34lCI Starter wiring can be confusing to someone who has not wire... N55 Equipped CarsSpecial thank you to Evan Schulte for taking the time to put together the following guide! Overview The big... Universal Swap Wiring Guide (Interactive)Pick your engine and ECU and see only the chassis-side connections that apply to your combo. Pedal, fan, starter, EKP, CAN, all of it.

Engine Management and CAN

Holley Terminator X Max vs. MaxxECU vs. Haltech Rebel: Which Standalone ECU is Right for Your LS-Swapped BMW?Holley Terminator X Max vs. MaxxECU vs. Haltech Rebel: Which Standalone ECU is Right for Your LS-Swapped BM... Lse9x Holley Can Box ConfigurationWiring Blue red twisted pair wired to the BMW pt can connection at grey dme connector blue red twisted pair... LSE9x Can Box Ac Control With Holley Terminator LSE9x Can Box Ac Setup Basic Overview: The LSE9x can box sends the current state of the max ac button an... How to Configure Holley Terminator X to Control your BMW E9x Fan Wiring the BMW cooling fan is very simple. Power and ground connections are left totally stock and you onl... Selecting the Correct Part Number for Holley Terminator X Max ECU Installation in BMW e9x/e8x ChassisSelecting the Correct Part Number for Holley Terminator X Max ECU Installation in BMW e9x/e8x Chassis When ...