17/06/2026
π§ Classic Mini | Supercharged | Standalone ECU π§
This absolutely stunning Classic Mini was recently in with us following a full engine rebuild and a lengthy modification list, the headline upgrades being a supercharger conversion and standalone ECU installation.
The brief wasn't to chase power figures. The owner needed the ECU configured correctly, sensors calibrated, and a safe, reliable base map put in place ready for the engine's break-in period.
After calibrating all of the sensor inputs and building a sensible set of VE tables, we spent some time refining the idle control strategy to improve stability and drivability. From there, datalogging was configured and the car was moved onto our dyno in steady-state mode.
Unlike a full power run, steady-state tuning allows us to hold the engine at specific load and RPM sites, working through the fuel and ignition tables cell by cell in real time. This gives us the ability to build a smooth, consistent calibration with excellent drivability and predictable behaviour throughout the operating range.
The result was a very healthy and remarkably smooth 140hp. In a lightweight Classic Mini, that's more than enough to put a smile on your face.
As with many fresh builds, a few teething issues were uncovered during testing. The main one being the supercharger belt idler arrangement, which would begin to lose tension after prolonged load, allowing the belt to slip. Cooling will also require some further development, although packaging constraints in a Mini certainly make that an interesting challenge.
Overall, this has to be one of the cleanest Classic Minis we've had the pleasure of working on. The quality of the workmanship throughout the build is exceptional, and it was a genuine pleasure to be involved in bringing the project to life.
Projects like this are exactly why we love what we do.
π CainePerformance Ltd
North Lonsdale Road
Ulverston
Cumbria
LA12 9DJ
π 07533 945845
βοΈ 01229 797196
π§ [email protected]
π www.caineperformance.co.uk
Precision β’ Passion β’ Performance