← All articles
Closed-Loop Boost Control Starts With a Stable Base
Closed loop should make a good boost setup more accurate. It should not fight a bad wastegate, hose or base table.
Make open loop repeatable first
Before feedback is turned on, the spring, hoses, solenoid and duty table should make predictable boost. If the same duty gives a different result every run, feedback will only chase the problem.
Keep corrections small
A good controller corrects the small error left around a strong base table. Limits stop it from hiding a loose hose, sticking gate or wrong target.
Boost control is not protection
The ECU still needs separate protection for boost, fuel pressure, lambda and temperature. If something goes wrong, the car needs a clear and safe response.
Need help with a tune or a problem that won't go away? Send Chen the details.
Email Chen