Recovered 43HP on a 2017 Huracan
A previous tune was running too lean. We remapped the ECU on our dyno and adjusted the airflow ratios to fix a flat spot at 4,000 RPM.
A local property developer brought us his 2017 Huracan because it felt sluggish. He noticed a hesitation every time he hit 4,000 RPM on the A33 out of Southampton. We put it on our dyno and found the engine was running dangerously lean.
The challenge
The car had a previous map from a generic shop that did not account for engine bay heat. The air-fuel ratio was hitting 13.8:1 at wide-open throttle. This is far too lean for a V10 motor. The ECU was pulling timing to save the engine from melting itself.
This caused a massive flat spot in the middle of the power band. The owner, Alistair, thought he had a mechanical fault with the fuel pumps. He had already spent £480 at another garage trying to find the leak before coming to us.
Our approach
We started with a full diagnostic sweep and a back pressure check on the exhaust system. Our lead technician, Marco Moretti, spent 3.2 hours logging data while the car sat on the dyno. We monitored the heat cycles closely to ensure intake temps stayed consistent during the pulls.
We discovered the previous map was forcing the car to ignore its knock sensors in specific RPM ranges. This is a dangerous way to tune a car. We focused on the airflow ratios between 3,800 and 5,200 RPM. We also checked every titanium grade 2 weld on the custom pipework to ensure no air was escaping.
The solution
We wiped the old software completely. We wrote a new calibration from scratch on our local server. This new map prioritised engine safety and smooth power delivery over peak numbers.
We adjusted the fuel tables to bring the ratio down to a safer 12.4:1 under load. The car went through 7 separate heat cycles on the dyno to confirm the settings stayed stable. We used lathe-turned precision spacers on the O2 sensors to prevent any dash lights from popping up during the drive home.
Results
The Huracan now pulls cleanly from 2,000 RPM all the way to the redline without any hesitation.
Timeline
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Jan 4, 2025Initial diagnostic and first dyno run to identify the lean spot.
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Jan 5, 2025Software extraction and writing the custom fuel maps.
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Jan 7, 2025Final stress testing and customer handover in Southampton.
"I was worried the engine was dying because it kept jerking at speed. Marco showed me the dyno data and fixed the software in three days. It feels like a different car now."