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Engine · 993-ENG-FAN-HOUSING-ALSI10MG-F0-0001

Stationary engine fan housing, AlSi10Mg F0 concept

ConceptNot authorised until engineering review

Independent concept of a 993 annular housing combining shell, front flange, alternator support and six spokes. The sources establish the part number, a commercial envelope, two consistent masses and a reseller claim of aluminum, but no interface geometry; the F0 does not reproduce the Porsche part.

Concept CAD rendering for 993-eng-fan-housing-alsi10mg-f0-0001.
Not a photograph, not a render of a manufactured part, not evidence of fit or function.
Concept CAD orthographic views for 993-eng-fan-housing-alsi10mg-f0-0001.
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 air cooled fitment to confirm
Porsche part numbers
99310666703, 99310666701
Category
Engine cooling fan housing
Geometry basis
Mixed
Preferred process
Not chosen yet
Other candidate processes
Laser powder-bed fusion (metal printing), Direct metal laser sintering (metal printing), casting, CNC machining
Material
EOS Aluminium AlSi10Mg T6 for comparison; commercial replacement declared only as unspecified aluminum
Material standard
DIN EN 1706 EN AC-43000 and ASTM F3318 for the candidate; program-specific cooling, fatigue and containment specification to be contracted

Known limits

  • The 300 x 300 x 170 mm figures are a commercial envelope, not a definition drawing.
  • The 1.86/1.9 kg masses are commercial claims with no protocol and no weighing boundary.
  • The aluminum material comes with no grade, no process and no certificate; AlSi10Mg remains a candidate.
  • The 252 mm diameter, 3 mm shell, 4 mm flange, hub, six spokes and mountings are synthetic.
  • The flow, loss, load, speed, blade count and temperature cases are regressions with no 993 authority.
  • The constrained thermal screen fails; fatigue, containment and cooling remain non-computable.
  • No CFD/CHT, converged FEA, correlated modal, overspeed, vibration or endurance is demonstrated.
  • The STEP proves only a re-readable BREP; no manufacturing, rotation or start-up is authorized.

Post-processing it would need

  • Orientation and supports of the 300 x 300 x 170 mm ring to be qualified
  • Stress relief then T6 with monitored quench and distortion
  • HIP to be decided on fatigue, air tightness and tomography results
  • Machining of the fan bore, alternator seat, mounting, seal and datums
  • Deburring, open depowdering and particle-free duct finishing
  • Anti-corrosion treatment compatible with temperatures, fasteners and engine compartment
  • Final clearance check before any rotation

What a supplier would have to provide

  • Traceable large-platform machine, parameters, orientation, supports, powder and lot
  • Oriented coupons with tensile, fatigue, creep and hot corrosion
  • Witness samples for annular distortion and duct surface finish
  • Full CT, FPI and metallography with zoned defect criteria
  • Metrology of bore, concentricity, alternator, mountings, seal and envelope
  • Evidence of flow, vibration, overspeed/containment, thermal cycling and engine endurance

Sources