Enter your registration and we'll build a full performance dossier for your exact vehicle — verified Stage 1 & Stage 2 gains, interactive dyno curves, acceleration estimates and side-by-side stage comparisons. Free, instant and honest about every number.
Enter your registration above and the lab will assemble your vehicle dossier: verified tuning stages, modelled dyno curves, acceleration estimates and a full engineering breakdown.
The FLR Tuning Calculator does in seconds what used to take a phone call and a day's wait — and it shows its working at every step.
Your registration is matched against a professional tuning database — the same one we use to quote and calibrate real customer cars. That gives us your precise engine variant, ECU, gearbox ECU and factory output, not a generic model guess.
Stage 1 and Stage 2 power and torque figures come straight from verified calibration data for your engine and ECU combination. These are the headline numbers we stand behind — no inflated marketing percentages.
Around those verified peaks, our engineering model reconstructs the shape of your power and torque curves, estimates kerb weight for your vehicle class and computes 0‑62 mph and 30‑70 mph deltas. Every modelled figure is badged as an estimate.
Overlay stages, compare against another vehicle, read the engineering explainers, then download or print your dossier. If you like what you see, request a quote — we usually come back the same day.
A tuning calculator is only useful if you understand what it's telling you. Here's the honest engineering behind every figure on this page.
Torque is the twisting force your engine produces at the crankshaft, measured in newton metres. It's what you feel as in-gear pull — overtaking punch, towing strength, effortless motorway cruising. On a turbocharged engine, torque is the figure a remap transforms most, because raising boost pressure directly raises cylinder pressure and therefore twisting force.
Brake horsepower is torque multiplied by engine speed. Two engines with identical torque produce very different power if one revs harder. That's why remap gains in bhp and Nm rarely match percentage-for-percentage: the calibration adds most of its torque in the mid-range, while peak power depends on how much of that torque survives to high rpm.
Modern turbo engines don't have a torque "peak" so much as a plateau — the ECU holds torque flat across a band of engine speeds to protect the drivetrain and manage boost. A good remap widens and raises that plateau, which is why a tuned car feels stronger everywhere, not just at full throttle near the red line.
Our 0‑62 mph and 30‑70 mph figures are modelled from your verified tuned output and an estimated kerb weight for your vehicle class, with allowances for drivetrain loss and traction. They're honest engineering estimates — useful for comparing stock against tuned — not manufacturer-certified test results.
For turbocharged vehicles the dossier estimates boost pressure and mass airflow before and after tuning. More air plus matched fuel is where every gain ultimately comes from. We also flag the practical ceilings — turbo efficiency, injector duty and exhaust gas temperature — that define what a safe Stage 1 or Stage 2 can ask of your hardware.
Every figure in your dossier carries one of two badges. Verified means it comes from calibration data matched to your exact engine and ECU. Estimate means it's computed by our engineering model around those verified figures. We never blur the line — that's the whole point of this tool.
The calculator shows you the numbers for each stage. Here's what each one actually involves on your car.
A custom recalibration of your factory ECU with no hardware changes. Boost, fuelling, torque limiters and throttle mapping are optimised within the safe headroom your standard turbo, injectors and clutch already have. Fully reversible, and the sweet spot for most daily drivers. What limits Stage 1? The factory hardware — a Stage 1 file deliberately stays inside what the standard turbo and fuel system can deliver all day, every day.
Stage 1 service & pricing →The same software-only approach as Stage 1, but with a more aggressive calibration for drivers who want the keener edge — quicker spool, sharper throttle and a wider power band. Ideal on healthy engines running quality fuel. It uses more of the factory hardware's headroom, so we check vehicle condition carefully before writing the file.
Stage 1+ service & pricing →A calibration built around supporting hardware — typically a performance downpipe or sports cat, and often an upgraded intake or intercooler. Removing the factory exhaust restriction lets the turbo breathe, and the software is rewritten to exploit it. Stage 2 gains are bigger, but the hardware isn't optional: the file assumes the extra airflow is there. What limits Stage 2? Usually the turbocharger itself reaching the edge of its efficient range, plus injector capacity and exhaust gas temperature.
Stage 2 service & pricing →Verified calibration data gives us four anchor points for each stage: stock and tuned peak power, stock and tuned peak torque. Our model reconstructs the curves between those anchors using the physics that governs how turbocharged and naturally aspirated engines actually deliver torque: spool-up behaviour at low rpm, the ECU-controlled torque plateau through the mid-range, and the taper towards the rev limit where airflow becomes the constraint.
Power at every engine speed is derived directly from the torque curve — power equals torque multiplied by rotational speed — so the two graphs are always physically consistent with each other and with your verified peaks.
Acceleration modelling uses your tuned output against an estimated kerb weight for your vehicle's class, corrected for typical drivetrain losses and a traction allowance on standing starts. Boost and airflow estimates for turbocharged engines are derived from specific output — power per litre — which is a strong proxy for how hard the induction system is working.
The result is the most honest picture a calculator can give you without strapping your car to our dyno. And when you're ready for the real thing, we do that too.
Straight answers about how the calculator works and what the results mean for your car.
The headline power and torque figures for each stage come from a verified tuning database matched to your exact engine and ECU — the same data we use to quote real jobs. The curves, acceleration times and boost figures are FLR engineering estimates built around those verified peaks, clearly labelled on the page. Final results on your car depend on its condition, fuel and hardware.
Yes. The FLR Tuning Calculator is completely free with no obligation. Enter your registration, explore your vehicle's tuning potential, compare stages and download your results. You only pay if you decide to book a remap.
Stage 1 is a software-only recalibration of your standard engine — no hardware changes needed. Stage 2 pairs a more aggressive calibration with supporting hardware such as a performance downpipe, sports cat or upgraded intake. Stage 2 produces larger gains but requires the hardware to run safely.
On turbocharged engines a remap raises boost pressure and fuelling in the mid-range, where the turbo has the most unused headroom. Torque is the direct product of cylinder pressure, so it rises sharply. Horsepower is torque multiplied by engine speed, and at high rpm the turbo and injectors are closer to their limits, so the percentage gain there is usually smaller.
The calculator covers the vast majority of UK-registered cars, vans and 4x4s from around 2000 onwards, including petrol, diesel and many hybrid models. If your registration isn't found, request a manual quote and we'll look up your vehicle by hand.
No — they are engineering estimates. We combine your vehicle's verified tuned power figures with an estimated kerb weight for its class to model 0-62 mph and 30-70 mph times. Real-world results vary with tyres, surface, weather, gearing and driver. We label every estimated figure on the page so you always know what is verified data and what is modelled.
Every dossier ends with a decision. Make yours an easy one — custom-written files, full diagnostics and mobile service across Lancashire and Greater Manchester.