Crimson Racing Wiki

Runner Gasket

Subteam: PowertrainSubsystem: ManifoldsAssembly: Intake AssemblyCars: CR22

Purpose

Seals the runner to the cylinder head.

Function

A compressed seal between two faces. The oil pan gasket is one piece and fibre-reinforced nitrile specifically so it seals dry, which reduces service time and complexity and eliminates the need for sealant.

Design Process

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.

Manufacturing Process

Waterjet for precision fitment and reproducibility, or purchased.

Full Material List

Purchased gasket.

Reoccuring issues

None recorded. This part has no entry in Knowledge_Transfer/Issue Logging/Fault Vault.xlsx, in either Issue Log.xlsx, in CR22/Issue Tracking/Shakedown 7-15-23.xlsx, or in any design review issue list found in CrimsonStorage or Box.

Properties

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 Gasket (as drawn): 8.65, 0.76, 2.03, 4.54, 0.64, 0.97, 0.61, 4.54 0.64, 1.11, 4.63 Source: Cost report drawings: CR22/Powertrain/Design/X - Cost Report Drawings/Manifolds/Intake/Runner Gasket.pdf Quantity per car, as costed: 4

Still to document

Nothing in CrimsonStorage covers these yet.