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Engine · 993-ENG-INTAKE-VALVE-F1-0001

993 intake valve - F1 proxy and titanium variant

ConceptNot authorised until engineering review

Non-functional parametric proxy for comparing the envelope and mass of a 993 intake valve with a 49 mm head and 8 mm stem, with a Ti-6Al-4V variant explicitly limited to simulation.

Concept CAD rendering for 993-eng-intake-valve-f1-0001.
Not a photograph, not a render of a manufactured part, not evidence of fit or function.
Concept CAD orthographic views for 993-eng-intake-valve-f1-0001.
Front, side and top views of the same concept CAD. Dimensions describe the model; fit on the car remains unverified.

The design

Vehicle
Porsche 993, 1994–1998
Variants
993 C2, 993 C4, 993 Turbo
Porsche part numbers
99310540902
Category
Engine valvetrain
Geometry basis
Estimated
Preferred process
Direct metal laser sintering (metal printing)
Other candidate processes
CNC machining, Laser powder-bed fusion (metal printing)
Material
Ti-6Al-4V Grade 5
Material standard
ASTM F2924 chemistry reference

Known limits

  • Overall length is a 109 mm hypothesis derived from a 110 mm product envelope.
  • Keeper groove, seat, margin, neck radius, coating, tolerances and cam/spring dynamics are not defined.
  • The generated STL is fit-check-only and must never be installed in an engine.

Post-processing it would need

  • Heat treatment qualified for the exact process
  • HIP decision by fatigue qualification
  • Finish machining of stem, tip, groove and seat
  • Surface treatment and polishing to be engineered

What a supplier would have to provide

  • Lot traceability
  • Process qualification
  • CT and metallography
  • Dimensional report
  • Fatigue and hot-valvetrain validation
  • Professional engineering release

Titanium route

Alloy
Ti-6Al-4V Grade 5 candidate for intake study only
Heat treatment
to be tied to machine and parameter set; EOS reference recommends stress relief/ductility treatment
Hot isostatic pressing
To be determined
  • CT
  • Density
  • Metallography
  • Surface roughness
  • Dimensional inspection
  • High-cycle fatigue

Sources