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Customer requirements
Input reference illustration
Start with the engine application, cylinder-head information, samples and the intended development goal.
CUSTOM FORGED PISTONS
Designed around
your application.
From a sample to a new idea, the conversation starts with your engine.
Three ways to begin.
Engine-based
Start with your engine model and intended application.
Sample-based
Use an existing piston as the starting point for discussion.
Project-based
Discuss a new geometry or a specific development brief.
DESIGNED AROUND YOUR ENGINE
From cylinder head
to piston design.
Your cylinder head helps define the piston. We use the combustion-chamber shape and valve layout as inputs for piston crown and valve-relief design.
Understand the head
Review the chamber, valve arrangement and the available reference information.
Match the piston
Develop the crown geometry and valve-relief layout around the engine requirements.
Review the complete assembly
Review cam lift, timing, assembly dimensions and required operating clearances before finalising the design.
CYLINDER HEAD TO VALVE RELIEF
Review. Refine. Check again.
Customer cylinder-head information guides the 2D layout and 3D piston-and-valve review. Valve reliefs are refined through repeated checks.
- Cylinder-head requirements
- 2D structural layout
- 3D assembly review
- Valve-clearance refinement
Illustrations have identifying text and dimensions removed for public display. Final clearance is checked against the original engineering files, valve lift, timing and assembly requirements.
SAMPLE TO DESIGN
From an OEM sample
to a forged-piston design.
A customer-supplied cast OEM sample provides the reference for defining geometry and developing a forged-piston CAD design.
Left: JND forged-piston CAD design
Right: customer-supplied cast OEM sample
FROM DEVELOPMENT TO PRODUCT
Your requirements.
A complete development path.
A piston-blank development route, shown through structural illustrations and manufacturing photographs.
02
2D engineering design
2D engineering design
The drawing connects cylinder-head references with the piston geometry.
03
3D design review
Piston CAD design
Crown, ring grooves, pin bore and skirt geometry are reviewed before blank preparation.
04
Blank preparation
Actual blanks and production cell
After the 3D design is confirmed, blanks are prepared for the agreed manufacturing route.
05
Machining & work in progress
Robotic production cell · 7 seconds
Robotic handling connects blank loading with the subsequent machining process.
06
Finished piston
Existing finished-product reference · not this project
Review the finished part against the agreed specifications before the delivery arrangements are confirmed.
Cylinder-head geometry and customer requirements inform drawing development, 3D review, blank preparation and machining. Final geometry and manufacturing specifications follow the agreed project drawings. The finished-product image is a reference from the existing range.
Discuss your development projectDESIGN CONVERSATION
Define what matters
to your application.
Crown geometry
Crown volume, valve clearance and combustion-chamber context.
Pin & connecting rod
Pin dimensions and the interfaces that need to work together.
Ring package
Ring dimensions and groove requirements.
Application & material
Intended use, thermal conditions and material selection.
Do I need all the technical specifications?
No. Start with what you know. The engine model, intended use, sample availability and approximate quantity help frame the project.
Can I share drawings?
Yes, after agreeing a suitable communication channel and any confidentiality requirements. Do not put confidential drawings in a public message.
How are pricing and lead times confirmed?
They depend on the agreed design, quantity and development requirements, and are confirmed in the project quotation.
YOUR BRIEF. THE RIGHT DETAILS.
Define the combination before the part.
01
Crown, pin and ring package
Bring the cylinder-head details, stroke, rod length and target compression ratio. These inputs guide the crown, compression height and component specification.
Explore this detail ↗02
Forged blank or billet
Choose the route around the geometry, quantity and development requirements. The illustrated cylinder-head case uses a piston blank.
Explore this detail ↗03
A complete specification
Discuss alloy grade, pin material, ring pack, coatings, clearances and weight matching before the manufacturing specification is approved.
Explore this detail ↗GEOMETRY & FIT
Designed as part of the whole engine.
Valve and camshaft flexibility
Selected models use a zero-offset pin and retain material below the crown for valve-pocket machining. Crown designs can accommodate larger valves and high-lift camshafts, subject to the specified engine combination.
Offset-pin and skirt development
Most designs use an offset pin to help reduce cold-start noise. Strut-style skirt designs balance wear, noise and rocking control; selected applications can operate at clearances such as 0.004 in.
Compression height and groove details
Compression-height options support short- and long-stroke combinations. Pressure-balance grooves and project-specific valve reliefs address different aspects of the piston design.
Features vary by model and application. Final alloy, components, clearances and installation requirements follow the confirmed product specification. Horsepower examples describe specific project configurations, not a universal piston rating.
APPLICATIONS & CUSTOM DEVELOPMENT
Built around the way you use it.
Performance engine coverage
Replacement and upgrade solutions cover selected Japanese, European and American performance engine platforms, with application-specific matching for competitive and high-performance street builds.
Specialist diesel-racing projects
Specialist aluminium and steel piston designs address the high-temperature, high-pressure loads of diesel-racing applications. The design and material are selected for each project.
From a sample, drawing or idea
Custom piston development supports specific dimensions, compression ratios and engine combinations, with a flexible approach to project requirements and cost planning.
YOUR NEXT PROJECT