Tools & Calculators
Practical garage math for enthusiasts — fitment, gearing, fuel, wiring, plus Malaysian road tax, fuel prices, VIN and OBD checks. Everything runs right in your browser.
Tyre / Wheels Calculator
Compare tyres AND wheels — diameter, speedo error, J width, offset, poke & clearance.
Fitment & WheelsWheel Offset & Fitment
Poke, inner clearance and fitment changes when you change wheel width or offset.
Fitment & WheelsGear Ratio & Speed
Speed per gear, rpm at any speed and top speed from your ratios and tyre size.
Engine & PerformanceCompression Ratio & Displacement
Compute static CR and engine capacity from bore, stroke and chamber volumes.
Engine & PerformanceInjector Sizing
Size injectors for your power target — petrol, turbo or E85 with duty-cycle limits.
Engine & PerformanceWire Gauge & Voltage Drop
Pick the right cable gauge for any load — volts, amps, length and recommended fuse.
ElectricalUnit Converter
Torque, power, speed, pressure, temperature and fuel economy — car-guy units.
Converters & MathFuel Cost & Economy
Trip cost in RM, L/100km, km/L and mpg — know what a drive really costs.
Ownership & CostsDatalog Viewer
Import ECU logs (CSV or Excel) and overlay RPM, boost, AFR — every channel on one zoomable chart.
Data & DiagnosticsE85 & Ethanol Blender
Mix pump E85 with petrol to hit any target ethanol content — octane, stoich AFR and cost included.
Fuel & EthanolAFR ⇄ Lambda Converter
Convert wideband readings between AFR and lambda — petrol, E10, E85, methanol and custom blends.
Fuel & EthanolFuel System Sizing
Size the pump, injectors and feed line for your power target — petrol, E85 or methanol.
Fuel & EthanolWater/Methanol Injection
Make your mix and estimate the charge-cooling effect — how much spray for how much intake temp drop.
Fuel & Ethanol2-Stroke Premix
Fuel-to-oil ratios for karts, bikes and outboards — exact oil volume for any tank.
Fuel & EthanolBoost & Airflow Estimator
Airflow, pressure ratio and boost needed for a power target — see what the turbo has to move.
Engine & PerformanceAir Density & Density Altitude
Track the air your engine breathes — density, density altitude and the power it costs you.
Engine & PerformanceDrag ET & Horsepower
Convert between ET, trap speed, weight and power — the classic drag-racing estimates.
Engine & PerformanceAlignment & Scrub Radius
Camber and toe conversions plus scrub radius — see what offset changes really do.
Chassis & SuspensionCorner Weights & Ride Frequency
Weigh the car, find the wedge, and dial spring rates to a target ride frequency.
Chassis & SuspensionBrake Bias & Weight Transfer
How much load moves forward under braking — and where your bias should sit.
Chassis & SuspensionWiring Diagrams & Planner
Relay circuits drawn out for you — pick a job, size the fuse and wire every leg.
ElectricalBattery & Alternator Sizing
Add up your loads — pick the alternator and battery a race car actually needs.
ElectricalMalaysia Fuel Prices
RON95, BUDI95, RON97 and diesel — this week's official prices, weekly change and 6-month history.
Ownership & CostsRoad Tax Calculator (MY)
Private car road tax by cc for Peninsular or Sabah/Sarawak — plus the 2026 EV schedule by motor kW.
Ownership & CostsVIN Decoder
Paste a VIN — decode make, model, year, engine and assembly country from the NHTSA vPIC database.
Data & DiagnosticsOBD-II Code Lookup
What does that check-engine code mean? Plain-English meaning, likely causes and what to check first.
Data & DiagnosticsWiper, Bulb & Battery Guide
Wiper sizes for popular Malaysian cars, bulb-code reference and a JIS battery decoder.
Fitment & WheelsEV Charging Cost & Time
Session cost, charge time and cost per 100 km — with a live comparison against a petrol car.
Ownership & CostsCar Insurance Estimator
Comprehensive premium from the classic tariff baseline — sum insured, cc and the full NCD ladder.
Ownership & CostsBMW Part Number Decoder
Paste a BMW part number — the official main-group table tells you which system it belongs to.
Data & DiagnosticsBMW Parts Catalogue (ETK)
The full BMW ETK — pick your model, open a factory diagram and read every part number. Growing daily.
Data & DiagnosticsCar Loan Calculator (MY)
Instalment from the flat rate — plus the REAL effective rate, total interest and all-in cost.
Ownership & CostsNCD & Claim Impact
Your No-Claim Discount next renewal — and what one claim really costs over five years.
Ownership & CostsNumber Plate Prefix Lookup
W = KL? Decode any Malaysian plate prefix — states, Putrajaya, Langkawi and the special series.
Data & DiagnosticsChassis Code Decoder
E92, W204, FD2, ZRE172… find the car behind any chassis or platform code.
Data & DiagnosticsEngine Code Decoder
4G15, 2ZZ-GE, EA888, B58… engine families, specs and the cars they came in.
Data & DiagnosticsExhaust dB Meter
Phone-mic level + peak hold, with an indicative verdict vs the ~90 dB(A) exhaust reference.
Engine & Performance0-100 Sprint Timer
GPS 0–100 km/h with a 0–60 split and best times — starts itself at 3 km/h.
Engine & PerformanceWindow Tint VLT Calculator
Composite glass × film VLT per window vs the JPJ minimums (70 / 50 / no rear limit).
Ownership & CostsPuspakom Pre-Check
The 40-point self-inspection before you pay for the real Puspakom visit.
Ownership & CostsDrive-Day Conditions
Hourly rain risk, haze (PM2.5 / AQI) and official MetMalaysia warnings for 18 cities.
Ownership & CostsEV Charging Stations
Malaysian charging points — connectors, power (kW), operator and directions.
Ownership & CostsOn the way
- · More wiring circuit templates + an interactive drag-and-wire builder
- · Fuel logging (fill-ups) tied to the Car Journal
- · Part-interchange search across more BMW models and brands