Car build planning
Build your car.
The right way.
Plan your next build, find compatible parts and understand what your car needs to reach your performance goals.
Build Tester is free with no account. Saving a build needs a free account.
- Vehicle
- Your exact car
- Engine
- Factory or swapped
- Target
- Your power goal
What BuildLab does
Six tools that work together, from first idea to parts list.
- 01
Build Planner
Pick your car and a horsepower target, then review the supporting modifications that target depends on — fuel, cooling, clutch, driveline and brakes.Free account
Open the planner - 02
Build Tester
Run a proposed setup and see its strengths, limitations and the risks worth knowing about before you buy parts.No account needed
Test a build - 03
Engine Builder
Explore engine combinations, swaps and hybrid builds such as RB30DET or 1.5JZ, with the supporting work each one involves.Free account
Open Engine Builder - 04
Parts Finder
Search parts for your car with supplier links, fitment notes and pricing where a supplier publishes it.Free account
Find parts - 05
Vehicle Weak Points
Common faults, known weaknesses, maintenance items and the preventative upgrades worth doing first.Free account
Check weak points - 06
Build Score
See how a proposed build stacks up against what you want the car to do — street, drift, track, 4WD or show.Part of Build Tester
Get a Build Score
What a build report looks like
An illustrative layout, not a real result. Your report is based on the car, engine, fuel and goal you enter.
- Vehicle
- Nissan Cefiro (A31)
- Engine
- RB20DET · factory turbo
- Fuel / use
- 98 RON · street
- Power target
- Set by you
| Part | System | Why it's needed | Risk reduced | Priority |
|---|---|---|---|---|
| Engine management / tune | Management | Fuel and timing must be calibrated for the new target, with boost limits enforced. | Lean running, detonation | Required |
| Fuel pump | Fuelling | More power needs more fuel flow; a tired factory pump is a common limit. | Fuel starvation at high load | Required |
| Front-mount intercooler | Cooling | Keeps intake temperatures down so power stays consistent. | Heat soak, timing pulled | Recommended |
| Uprated clutch | Driveline | Factory clutches often slip once torque rises. | Clutch slip, glazing | Recommended |
Verified vs estimated
Factory specs are labelled separately from estimated gains and costs.
Missing information
Anything BuildLab can't confirm is flagged instead of guessed.
Power figures and costs are estimates, never guaranteed results.
Free account
Save your cars, track modifications and keep your build plans in one place.
Create a free accountBuildLab Premium
Extra tools for bigger projects, including the AI vehicle visualiser — describe the look you want and get a concept image based on your saved car — plus higher-horsepower planning and the price tracker.
See what's included