THE APOLLO KNOWLEDGE BASE
Understand the data.
Understand your build.
Technical articles by Keith Fields on ECU calibration, engine-management setup and troubleshooting. Explore the fundamentals, then discuss how they apply to your own vehicle.
Discuss your buildWritten by Keith Fields, with more than 20 years of calibration experience and over 14,000 vehicles tuned since 2005. These articles explain concepts; the correct settings and testing process depend on your specific hardware.
Looking for hands-on help? Explore COBB custom tuning or standalone ECU support.
Fuel, airflow & drivability
- COBB Green Speed, custom tuning and flex fuel
- Flex fuel calibration strategy
- How to build a stable idle calibration
- Speed density vs MAF
- Subaru flex fuel startup strategy
- Understanding closed loop fuel control
- Understanding ethanol content sensor behavior
- Understanding fuel pressure control
- Understanding injector characterization
- Understanding injector timing
- Understanding transient fueling
- Understanding volumetric efficiency modeling
Boost, torque & engine behavior
- Boost control oscillation explained
- Torque management calibration strategy
- Understanding boost creep
- Understanding crankcase pressure
- Understanding dbwire throttle control
- Understanding knock control strategy
- Understanding knock sensor noise
- Understanding launch control strategy
- Understanding torque intervention
- Understanding wastegate control
- Why DBW throttle closure happens
Sensors, wiring & diagnostics
- Common Emtron trigger setup mistakes
- Common Link G4X startup problems
- How to diagnose sync loss
- How to read a datalog properly
- MoTeC ref sync troubleshooting
- Motorsport CAN bus wiring best practices
- Understanding air temp sensor placement
- Understanding CAN bus termination
- Understanding canbus communication
- Understanding IAT compensation strategy
- Understanding MAP sensor scaling
WORK WITH KEITH
Need help applying
what you’ve learned?
Describe your setup and the behavior you’re trying to understand.
Discuss your buildOr email keith@acalibrations.com.
BEFORE YOUR APPOINTMENT
Bring the right details.
Use our vehicle, ECU, modifications and fuel checklist to prepare for your conversation with Keith.
Prepare for your consultation ↗TUNING, IN PLAIN ENGLISH
Tuning or calibration?
Tuning is what most enthusiasts call it. Calibration is the technical work behind the tune. In ECU tuning, the words often describe the same work.