The Real-Time Programming (RTP) project aims to enable live ECU tuning by replacing the static EPROM chip with an interface that allows for instantaneous map adjustments while the engine is running.

Technical Overview#

Traditional chip tuning requires removing the EPROM from the ECU, burning the data on an external programmer, and re-installing the chip. RTP replaces this process with an electronic module (typically utilizing NVSRAM) that interfaces directly with the ECU's memory bus.

Key Features#

• Live Tuning: Allows tuners to modify fuel, ignition, and sensor tables in real-time without turning the engine off.
• Data Acquisition: Integrates with datalogging software to allow for "on-the-fly" adjustments while monitoring sensor feedback.

Hardware Requirements#

Building an RTP module requires specific electronic components, including:

• Transceiver Chips: High-speed chips (e.g., MAX233 or FT232BM) to handle serial communication.
• Memory Modules: NVSRAM chips (e.g., STK14C88 or U634H256) to retain tune data.
• ECU Board Modifications: Precise soldering and trace modifications are required to enable full-duplex communication and memory bus access.

Warning: RTP hardware modification is an advanced task. Incorrect wiring or soldering can result in catastrophic ECU failure. Always perform thorough diagnostic testing of the module before connecting to a vehicle.