TunerCalc — ECU Tuning Calculator (Boost/AFR/MAF↔MAP) 1.0.0.8

TunerCalc is a compact, standalone calculator for the “daily math” you constantly do while editing ECU calibrations.
It doesn’t connect to a vehicle and doesn’t write to ECUs — it’s purely a calculation & conversion workstation that helps you avoid mistakes, speed up workflow, and keep values consistent across maps (boost, smoke, load, AFR/lambda, injector flow, etc.).



Read-only compliance note:
This software is a calculator only. No OBD/bench communication, no flashing, no patching, no file writing to an ECU. Use it for personal / educational planning and verification of numbers before you change anything in your editor.

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Why it’s useful (real-life tuning workflow)

• Stop guessing boost/smoke targets — calculate required pressure for a chosen AFR and fuel quantity.
• Convert correctly between AFR and lambda for different fuels (petrol/diesel/LPG/ethanol/etc.).
• Keep axes consistent when maps use different pressure units (mbar / kPa / PSI, manifold vs absolute).
• Quick sanity checks for mg/stroke ↔ mm³/stroke, air mass per cylinder, flow conversions.
• Planning tools for injectors & fuel delivery estimates + simple performance estimations.

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Modules & what each one does

AIR tab

1) Diesel Boost (Smoke / Turbo target helper)
Two calculator blocks that help translate fueling + AFR targets into boost needs:

• MAF Boost section:
  Enter your fuel mass per stroke (mg/stroke) and required AFR, then compute the boost requirement used to support a clean smoke limit / air demand approach.
• MBAR Boost section:
  Similar logic but oriented around pressure units and engine parameters (engine cc, cylinders) so you can relate air demand to MAP/boost figures more directly.

Use case: You know how much fuel you want to allow (or what the smoke limiter is doing) and your AFR target — TunerCalc gives you a boost number to validate your turbo/smoke maps.

2) Lambda Conversion (Fuel-aware AFR ↔ Lambda)
Select fuel type and convert:

• Lambda → AFR
• AFR → Lambda

Fuel options shown in the tool include:

• Petrol
• Diesel
• Methanol
• Hydrogen
• LPG
• Ethanol

Use case: You read lambda from logs/sensors but your calibration targets are in AFR — convert instantly with the correct stoich reference for the selected fuel.

3) Load Conversion
A simple helper to translate “requested load / pressure references” into practical boost/pressure values.
You input requested load and atmospheric pressure, and the tool outputs pressure results in commonly used forms.
Use case: When one map is absolute (includes atmosphere) and another is manifold/boost — this keeps you consistent.

4) MAF2MAP Conversion
Designed for scenarios where you want to relate MAF-oriented thinking to MAP/pressure-limiter logic:

• Inputs include engine displacement (cc), cylinder count, required AFR, and a pressure value from a MAP axis.
• Outputs an air/fuel-related result (e.g., mg/stroke reference for a specific limiter/map column concept).

Use case: Quick cross-checks when you’re aligning smoke limiter logic with MAP limiters and you need a clean numeric bridge between them.

5) MAF Housing Calculator
A quick helper for estimating scaling impact when changing MAF housing diameter/size (area-based scaling concept).
Use case: When hardware changes force you to rescale MAF-related values, this provides a fast “first estimate” to start from.

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FUEL tab

1) Injector Duty Flow
A practical “injector capacity vs RPM vs duty cycle” calculator:

• Set duty cycle (%)
• Evaluate injector flow across RPM points
• Convert outputs between common flow units (as presented by the tool: LBS/hour, mg/minute, grams/second)

Use case: Planning injectors for a target build or verifying whether you’re approaching unsafe duty at higher RPM.

2) Fuel Pump Calculator
Helps estimate the required fuel delivery for a target setup (planning-oriented).
Use case: Quick sanity check before you blame a tune for pressure drop — confirm whether the pump/flow target even makes sense.

3) MPG Calculator
A utility for fuel-economy related conversions/estimates.
Use case: Converting between measurement standards or doing quick “what-if” comparisons.

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POWER tab

Power % Calculator (Stage presets)
A clean way to estimate “before/after” power & torque using percentage deltas:

• Enter original BHP and original torque (Nm) + their RPM points
• Apply % increase via sliders
• Get resulting modified BHP and torque
• Use Stage 1 / Stage 2 / Stage 3 presets for quick standard jumps

Use case: Customer communication, internal planning, or a quick reality check (“if we add X% torque here, where does it land?”).

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SPEED tab

Acceleration / ET estimator
A lightweight performance estimator:

• Transmission type selection (manual/automatic)
• Inputs: weights + BHP
• Outputs: 0–62 mph ET, 1/8 mile ET, 1/4 mile ET, and MPH @ 1/4 mile

Use case: Rough estimates for build planning (not a dyno/track replacement — just a quick comparator).

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MISC tab (Mega Converter Dashboard)
This screen is a “conversion wall” for common tuning units — fast and mistake-proof:

• Speed: MPH ↔ KPH
• Torque: Ft/Lbs ↔ Nm
• Power: BHP ↔ PS/CV ↔ kW
• Boost pressure: kPa ↔ mbar ↔ PSI (and common cross-conversions)
• Boost flow: CFM ↔ g/sec
• Fuel mass/volume: mm³/stroke ↔ mg/stroke
• MG/Air (cc per cylinder helper): uses engine cc + cylinders to convert/reference air mass style values
• Barometric pressure: mbar ↔ inHg
• Weight: kg ↔ lbs
• Size: inch ↔ mm
• Temperature: °C ↔ °F
• Volume flow: cc ↔ lbs/hr (as provided by the tool)

Use case: When you jump between editors, DAMOS/A2L units, logs, and different map conventions — this keeps your numbers aligned.

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OPTIONS tab
Power Calculator Preset Settings
Save default Stage 1/2/3 percentage presets for BHP and torque so your Power tab becomes a one-click estimator.

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ABOUT
Tool branding: Roarcuss Technologies
Author shown in the UI: Leonard Curtis
Version shown in the UI: 1.0.0.8 (copyright date displayed in the app)

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OS / Run notes

• Standalone Windows executable: TunerCalc.exe
• If it doesn’t start on your system, install/update Microsoft .NET Framework (common fix for older standalone utilities).

Package contents

• TunerCalc.exe

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Disclaimer
Any calibration change can damage hardware or violate local regulations depending on use-case.
Use this calculator as a planning/verification tool and apply changes responsibly.

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