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  • Tech & Tuning
    • Engine ManagementReference articles on ECU calibration, air modelling and engine control. Car-agnostic technical writing: the maths, the measurements, and the failure modes. Applies to any standalone platform, not just the cars on this site.
  • Partners
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      • SRD Tuning
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      • Rays Wheels UK
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      • Pulsar Turbo
      • Rajab Racing
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Chart of permitted wheel slip against lateral G for three traction control settings, each forming a dome that peaks in a straight line and tapers as cornering load builds
Posted inEngine Management Mk4 Supra Tuning

Traction Control on 1,114 whp: Feedforward, PID, and Why It Never Cuts

1,114 whp, 880 lb ft, and a 295 section road tyre on the back. Traction control on this car is not a driver aid. It is the thing that makes…
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Schematic showing engine speed continuing to rise while measured output torque falls away, the signature of clutch slip inside a ZF 8HP70 during a dyno pull
Posted inEngine Management

Where the Stock ZF 8HP70 Gives Up: 901 lb ft, Measured

The ZF 8HP is the default answer for anyone putting an automatic behind a big power engine, and the question that follows it everywhere is the same: how much will…
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Recent Posts

  • Erratic Shifts and Idle Overfuelling on the 2JZ: Finding a DBW Feed-Forward Fault
  • Traction Control on 1,114 whp: Feedforward, PID, and Why It Never Cuts
  • Twelve Small Injectors Instead of Six Big Ones
  • Staggered Tyres and Traction Control: What the ECU Corrects, and What It Can’t
  • What E85 Actually Buys: Boost, Timing, and Where the Advantage Vanishes

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