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Technical Paper

Engineering a Composite Intake Manifold for the Performance Aftermarket

2004-11-30
2004-01-3512
Historically, the intake manifold for the automotive engine application has evolved from a crude cast iron machined component to the highly engineered and precision manufactured component of today. In the high-volume (Original Equipment Manufacturer) OEM market, injection molded composite intake manifolds have been growing steadily in application for the past 20+ years. Now, with the continued experience and manufacturing developments, even the relatively low-volume applications of the performance aftermarket intake manifold can benefit from the described advantages that injection molded composite materials offer. An engineering process that is very similar to that which would be used for an OEM product is applied to this low-volume niche-market product. This process utilizes a clear understanding of the outlined program's requirements that leads into an innovative prototype stage to prove the design and manufacturability.
Technical Paper

Coolant Flow Optimization in a Racing Cylinder Block and Head Using CFD Analysis and Testing

2004-11-30
2004-01-3542
Coolant flow absorbs heat generated from engine combustion, and continued efficient heat transfer is crucial in high performance racing engines to provide maximum engine power and durability. Any potentially stagnant flow may cause an overheated zone in the coolant jacket resulting in structural damage. Critical areas can include the cylinder head around exhaust ports. Due to complexity of the geometries, flow patterns around those areas are not well understood. In this report, Computational Fluid Dynamics (CFD) analysis, combined with testing, is utilized to study a typical racing engine coolant jacket. The results include coolant flow assessment in critical zones as it is affected by cooling flow inlet, head gasket design, and flow outlet geometries.
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