CR22 naming for the individual runner tube.
See the Runner Assembly entry.
No part-specific design process is documented. The Manifolds subsystem design process applies: 1. Build the engine model in GT Suite from measured geometry: silicone-cast and 3D-scanned intake ports, dial-indicator-measured cam lobe profiles, MTS-measured valve spring curves. 2. Use GEM3D to convert manifold CAD into GT Suite flow geometry, which cut manifold setup from several hours to about 30 minutes and let subassemblies be swapped for fast comparison. 3. Sweep plenum volume, runner length and primary length in the model against volumetric efficiency. 4. Confirm on the flow bench. CR26I plenum flowed 2.34% more than CR25 and 11.15% more than CR22 on average across 10-50 in-H2O, with testing extended to 70 in-H2O (17.4 kPa) to reach WOT conditions. 5. Prototype-test the muffler on the previous car before finalising, sweeping length (14 in and 16 in), packing density, tailpipe diameter (2 in and 1.5 in) and a diffuser-style tip against the sound limits.
Aluminium. From the cost report drawings and CAD: From the cost report drawings: Carbon Fiber (Runner Main Body).
Fault Vault, 2023-07-27, CR22, Complete Failure: intake runners cracked at the base with EGTs running high at idle. Fixes considered were coating the cracks with Hysol 9460, softer rubber isolation, or printing new runners.
Dimensions called out on the cost report drawings. These are the figures printed on the drawing, not a labelled specification; open the drawing itself for what each one refers to. Runner Main Body (as drawn): 5.11, 1.91, 5.38, 7.24, 8.13, 0.24, R0.58, R0.06, 8.26, 7.26 Quantity on the drawing: 4. Source: Cost report drawings: CR22/Powertrain/Design/X - Cost Report Drawings/Manifolds/Intake/Runner Main Body.pdf Quantity per car, as costed: 4
Nothing in CrimsonStorage covers these yet.