Engineering Notes from the Combustion Lab.
Dyno case studies, flex-fuel theory, install walkthroughs, and the unfiltered story behind building plug-and-play E85 conversion hardware.
The Flex-Fuel Sensor: How Excell Reads Your Tank
A 30-second engineering breakdown of the GM/Continental 13577429 sensor that makes plug-and-play E85 conversion possible.
Five E85 Myths That Won't Die
No, ethanol won't eat your fuel lines. No, your warranty isn't void. Let's put the most stubborn misconceptions to bed.
Case Study: 2018 WRX, +63 WHP on Pump E85
Dyno numbers, fuel trim data, and the surprising long-term reliability story from one of our beta testers running Excell for 18 months.
Installing Excell in Your Garage: A Visual Walkthrough
Forty-five minutes, a 10mm socket, and a flashlight. Here's exactly what you'll do, in the order you'll do it.
What Live Telemetry Actually Tells You
The Excell dashboard streams 14 channels at 100Hz. Here's what each one means and which three to watch when you're chasing more power.
Excell, Your Warranty, and Going Back to Stock
The legal framework, the technical safeguards, and exactly what happens when you unplug the module.