Built to race.
Engineered to win.
Built Different
Engineered By Design started in 2006 as a place to document real engineering work - not theory, not speculation. Race car builds, engine development, CAD and simulation consultancy, and a growing library of tools built from hands-on experience.
The background spans mechatronics across aerospace, petrochemical, and commercial vehicle sectors. 9 patents, 2 academic papers, and an active sprint car programme since day one. Every calculator and reference tool on this site came from a genuine project need.
Full Story →Engineering
CAD, simulation, analysis and consultancy. Automotive, aerospace and commercial vehicle sectors.
Motorsport
Active sprint car programme since 2006. Multiple cars built, developed and raced.
Projects
Commercial CAD, tooling design, CFD analysis and bespoke component manufacture.
Tools
Free engineering calculators and reference data. Used by engineers and enthusiasts worldwide.
The Cars
An active sprint car programme running since 2006. Each car a different challenge - different class, different engine, different problem to solve.
Peugeot 106 Rallye
1400cc naturally aspirated. Yamaha R6 ITBs, fabricated aluminium port re-pitch section, staged injection. The original EBD sprint car - extensively developed.
Kinematics & Dynamics Study →Vauxhall Nova
1400cc Group A chassis. Hillclimb and sprint. Lightweight shell, big cam, twin 40 DCOEs.
Nova Twin Carb
Modified production class. Twin 40 DCOE carburettors. TWMC and RMC sprint series.
Ford Fiesta
1400cc Ford-based sprint car. FF class competitor.
Ford Focus ST170
2.0 Duratec road car project. Performance development and data logging platform.
Ford Fiesta ST150
2.0 Duratec ST. Current race and development car. Data logged with AiM and VBOX. Billet aluminium TCA adapters designed and manufactured in-house.
Project Page - Coming Soon →Engineering Portfolio
Commercial CAD work, tooling design, CFD analysis, engine builds and bespoke components. Real projects, delivered to manufacture.
Godden Speedway Engine
Single cylinder speedway specification engine build. 63 BHP from under 30 kg - 250 BHP per litre from a normally aspirated unit. FEA-led rocker arm redesign.
Project Page →FST-150 Suspension Upgrades
Billet aluminium lower track control arm adapters designed for the Fiesta ST150. Machined by Godden Engineering. Integrating rose joints for improved camber and caster adjustment.
Coming Soon →Performance Exhaust Tooling
Full manufacturing tooling design packages for DEP Pipes, Kent. Covering KX500, PH20021 silencer front cone, and PMR250 front pipe product lines. Formal drawing packages to production standard.
Coming Soon →S7R Silencer Flow Study
CFD velocity flow trajectory analysis on the DEP S7R carbon tip silencer can. Overlaid on production CAD model. Demonstrates internal flow distribution and recirculation zones.
Coming Soon →Vehicle Inspection System
Full metalwork design for the ZONE ANPR vehicle inspection system. Camera stanchions, insert boats, base plates, and speed humps. Deployed commercially at BMW dealerships across the UK.
Coming Soon →Construction Tablet Holder
Purpose-built tablet mounting system for construction site access control. Table and wall mount configurations. Formal drawing package to DEP part number standard. Part of the Causeway site management system.
Coming Soon →OBD-II Fault Code Database
Search over 800 generic OBD-II diagnostic trouble codes — P, U, B and C codes with full descriptions, DTC type explanations and OBD-II connector pinout reference.
Engineering Calculators & Reference
All tools are free to use. No login, no ads, no nonsense. Built for engineers and racers who need real numbers fast.
BSFC & Injector Sizing
Brake Specific Fuel Consumption, thermal efficiency and injector flow rate calculator. Three linked calculators with fuel type selection.
Power & Torque
Convert between power and torque at any RPM. kW, BHP, Nm and lb·ft with live calculation.
Race Fuel Load
Calculate fuel required for a race or sprint event. Laps, consumption rate and tank sizing.
Tyre Size Calculator
Overall diameter, loaded radius, rolling circumference and speedometer correction from tyre sidewall markings.
Chassis Calculators
Skidpad lateral G-force from timed laps, and coil spring rate from physical wire and coil measurements.
DTC Code Search
800+ OBD-II diagnostic trouble codes. Live search by code or keyword across P, U, B and C categories.
Piston Kinematics & Dynamics
PPP-106 engineering study. Piston acceleration, peak force, con-rod stress and factor of safety. Includes interactive calculator.
Throttle Body Sizing
ITB and single TB sizing from power and RPM. Air velocity checker, reverse restriction test, and donor TB reference data.
Hydraulic Cylinder
Areas, volumes, flow rates, power and force for hydraulic cylinders. Full working with SVG diagram.
Metric Thread Drill & Tap
ISO metric coarse and fine thread tap drill sizes. M1 to M68. With ISO 68-1 profile reference.
Preferred Metric Threads
ISO preferred metric thread series. First, second and third choice thread designations.
Imperial Thread Data
UNF, UNC and BSF imperial thread data including tap drill sizes and thread form reference.
Hardness Conversion
HRC, HRB, HV, HB and tensile strength conversion table for steel and common alloys.
RAL Colour Chart
Full RAL 9000 colour reference with hex values, grouped by colour family. For paint specification.
Bolt Torque Guide
Standard tightening torques for metric bolts by grade. Dry and lubricated values.
Loctite Product Guide
Threadlock, pipe sealant and retaining compound selector. Colour reference, temperature ratings and motorsport use cases.
Conversion Factors
Engineering unit conversions. Length, area, volume, mass, force, pressure, temperature and more.
Piston Anatomy
Component identification, ring groove layout, pin boss and skirt terminology. Engine builder reference with labelled diagrams.
Lap Analysis Workflow
How to find time in your data. Speed trace overlays, braking point identification, sector-by-sector breakdown and setup correlation. AiM EVO4S and VBOX HD2.
Data Channel Reference
What every channel actually tells you. Trace shapes, typical G-force ranges for club racing, IMU mounting checks, and how to tell bad data from bad driving.
Gear Ratio Calculator
Road speed in each gear from engine RPM, gear ratios, final drive and tyre size. Coming soon.
Compression Ratio
Swept volume, clearance volume and compression ratio from bore, stroke, head and gasket dimensions. Coming soon.