325i E30 — Stage 1 ECU Tune
- 9% power increase to 100kW
- 76% torque increase to 177Nm
- Improved circuit racing performance
- Enhanced torque output for acceleration
- Optimized fuel delivery and ignition timing
The M20 six is a straightforward platform to work with once you swap out the factory Motronic for something more flexible. This particular 1988 325i came in running an Ecumaster standalone, and the customer wanted a safe, repeatable street tune on 98 RON pump fuel.
The file focused on getting the fuel and ignition maps sorted properly, with injector characterisation dialed in and timing optimised for pump octane. The dyno sheet came back showing 100 kW at the wheels, up from 91.7 kW, with torque lifting from 100.6 Nm to 177 Nm — a solid result for a naturally aspirated M20 without any headwork or cam changes.
Nothing exotic here, just methodical tuning to extract what the engine can comfortably deliver on 98. It pulls cleanly through the midrange and holds power well into the top end without any fuss.
Why does a naturally aspirated M20 need boost control configuration?
The modifications list reflects the Ecumaster platform's full feature set being configured during the tune. The M20 itself is naturally aspirated, so boost control isn't active — just part of the base ECU setup for this standalone.
Is 177 Nm realistic for a stock-bottom-end M20?
Yes. The standard M20B25 made around 165–170 Nm from factory, and with proper fuelling and timing optimisation on a standalone ECU, the figure recorded here is well within safe limits for the stock bottom end.
Does this tune require any hardware changes?
No. This is a Stage 1 software-only calibration, though the car already had an Ecumaster ECU and supporting fuel system fitted prior to tuning.
Workshop & Dealer Access
Protunes supplies ECU calibration files exclusively to approved workshops, tuners, and dealers throughout Australia. Platform: Ecumaster.
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