Shop
Performance ECUs and modules built and tested in‑house, ready to ship.
Shop products
Automotive ECUs · Engineering
Engine control units, engineered in‑house.
FUP designs and builds performance ECUs — backed by open documentation and a running log of every experiment along the way.
In‑house firmware
Open documentation
CAN‑ready
Everything in one place
Three sides of FUP
Buy the hardware, learn how it works, and follow the engineering as it happens.
Wiki
Full documentation for every product — pinouts, protocols, install guides and reference.
Open the wikiBlog
Experiments, bench notes and design considerations, logged as the work happens.
Read the log
From the bench
Featured products
Engineering log
Latest from the blog
Why we moved to a 32‑bit floating‑point fuel model
Moving the M1 fuel model from fixed‑point to 32‑bit floating point removed a whole class of scaling bugs — for about 4 µs…
Bench test: knock detection on the M1 prototype
Validating the wide‑band knock detection pipeline on the M1 prototype against a reference engine — latency, false positives, and one surprising noise…