161: Standalone vs OEM ECU: Understanding Modern Engine Control

From carburettors and distributors to neural networks and AI-driven ECUs, Gerry Bechet’s career spans the full evolution of modern engine control. From his early days at Toyota South Africa to high-level development work at Ricardo, Renault, and Holden Special Vehicles, Gerry has been right at the heart of OEM engine calibration and development.👉 Use the code ‘PODCAST500’ to get $500 OFF HPA's VIP Package: https://hpcdmy.co/podvipIn this episode of Tuned In, we dive into Gerry’s journey through the automotive industry, starting with his early passion for mechanics and progressing into a career as a mechanical engineer specialising in engine development and calibration. We unpack his time at Ricardo working on diesel engine R&D, including common rail injection and combustion chamber design.The conversation then shifts to OEM calibration at HSV, where Gerry worked on GM’s LS platforms. We explore the realities behind factory tuning—balancing power, emissions, durability, and even marketing demands—and why factory ECUs are far more complex than most people realise.We also break down the tuning myth of “magic numbers,” why airflow modelling is everything, and how small errors in injector data or fuel pressure can throw an entire calibration off. Gerry shares real-world examples that highlight why understanding the fundamentals still matters—no matter how advanced the software becomes.Finally, we get into Gerry’s current role with HP Tuners and the development of the new Core ECU. Designed to bridge the gap between OEM-level control and aftermarket flexibility, this standalone system brings advanced strategies like MAF and speed density integration, along with AI-assisted VE tuning. We discuss where it fits in the market, who it’s for, and how tuning technology is continuing to evolve.This episode is packed with insight—from old-school engine fundamentals to cutting-edge ECU development. Whether you’re a tuner, engineer, or just passionate about performance cars, Gerry’s depth of experience makes this one well worth your time.👉 Use the code ‘PODCAST500’ to get $500 OFF HPA's VIP Package: https://hpcdmy.co/podvipFollow Gerry here:Instagram: HPTunersYoutube: HPTunersWWW: HPtuners.comWWW: HPtuners.co.au Timestamps:0:00 Standalone vs OEM ECU: Understanding Modern Engine Control4:26 How did you get interested in cars?8:04 Working for Toyota in South Africa 12:02 Where did you end up after Toyota?14:02 What are you trying to find when you’re running these engines on the dyno?20:07 What is the time frame on developing one of these engines?21:52 How did your role progress at Ricardo Engineering?25:10 How was the transition to engine calibration?26:43 How does an emission system work?31:56 Tell us about your time at Holden HSV?43:29 What does OE calibration software look like?45:24 What’s your role at HP Tuners?47:15 Why do people who tune stand alone ECU’s find it hard to use HP Tuners?58:00 If MAF is so good, why  do we have a speed density system? 1:01:12 What is virtual volumetric efficiency and why did GM go in that direction? 1:03:52 What is a neural network?1:08:11 Are there any common HP Tuner mistakes? 1:14:19 Why have HP Tuners made a stand alone?1:23:53 How does the Core ECU operate?1:27:33 Automatic spark calibration, What can you tell us?1:30:26 Is there any consideration for CAN networks?1:32:14 How do we decide to reflash or fit the Core ECU?1:37:32 How does the work flow between the US and Aus work on this ECU?1:38:53 How do you get tuners to swap to your EC