# Engine Management & Tuning

**URL:** https://subieforums.com/c/technical/engine-management-tuning/10.md

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## [About the Engine Management & Tuning category](https://subieforums.com/t/about-the-engine-management-tuning-category/12)

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**Author:** [@subieforums](https://subieforums.com/u/subieforums)\
**Replies:** 0\
**Last updated:** [October 3, 2026, 4:37am UTC](https://subieforums.com/t/about-the-engine-management-tuning-category/12 "2026-10-03T04:37:10Z")

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ECUs, engine management, logging, calibration, boost control and tuning discussions. Include vehicle, engine, fuel, hardware and supporting logs when possible.

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## [Subaru Engine Guide: EJ, FA, FB, EZ & Engine Identification](https://subieforums.com/t/subaru-engine-guide-ej-fa-fb-ez-engine-identification/58)

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**Author:** [@subieforums](https://subieforums.com/u/subieforums)\
**Replies:** 0\
**Last updated:** [October 6, 2026, 5:40pm UTC](https://subieforums.com/t/subaru-engine-guide-ej-fa-fb-ez-engine-identification/58 "2026-10-06T17:40:41Z")

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EJ, FA, FB and EZ identify Subaru engine families. Codes such as EJ255 or FA20 narrow the identification, but they do not establish one specification across every year, model and market. Use the vehicle’s factory record…