Types 309 and 441 are two examples of specialist alloys with particularly high resistance to heat and stress. They have particular chemical and heat resistance virtues. Types 316 and 321 are similar to 304 and occasionally used for automotive exhausts. Ultimate corrosion resistance is not as good as type 304 but the cost is lower and availability excellent. Chromium (11%) is the main addition to the base steel. Type 409 is probably the most popular grade for original equipment exhaust components and especially catalytic converter casings and pipes. As a non-magnetic material, it is particularly specified for armoured vehicles. Chromium (10%) and Nickel (19%) are added to the base steel. ![]() Type 304 austenitic is generally regarded as the best grade for automotive use and this is the alloy that we use, in plain and annealed form, for 98% of our exhaust systems because of it's combination of availability, formability, durability and cost. Stainless Steel - There are around 120 different alloys of stainless steel, with various properties, those mainly used for car exhausts are: Sometimes this process must be repeated but eventually, when the answer to these is positive, the newest QuickSilver 'Sports' exhaust can proceed to production. Is the fitting process manageable? Are the expected benefits present? Is the cost sensible? Is the appearance correct? Is the sound quality right? The next stage is to quantify the improvements by measuring the sound volumes, weights and performance gains. We often develop new systems in partnership with a specialist in that make, where we can combine his experience of the model with our exhaust skills. What combination of improvements or advantages can we provide?Īnd what will the customers for this model demand?Īfter answering these questions we manufacture a prototype and obtain a car for testing. 'Sports' Exhaust Development.Īfter identifying a car that we should be manufacturing a QuickSilver exhaust for, we review the car's performance, see how the manufacturer has designed the original exhaust and then decide how, and if, we can improve it. Stricter emissions regulations are demanding ever-more complex silencer designs. In our conventional chambered silencers, we employ various techniques to fabricate all the internal components. This has been proven at Toyota, Volvo, DaimlerChrysler and GM Opel". "The glass fibre remains in place, even under the harshest conditions, meeting manufacturer's extended warranty requirements. Says Heinz Otto, President, Composites Systems Business. So, for environmental reasons we are moving over to use Advantex and Acousta-Fil stuffing, these have similar temperature and acoustic properties as the Basalt.Īdvantex is manufactured by Owens Corning Corp. This material requires rigid handling procedures in the factory. ![]() It's thermal properties are comparable with continuous high temperature glass but more stable at temperatures over 600° C. This is an essential component for most high temperature applications.įor sound, absorption we still employ long strand Basalt filament that offers excellent acoustic performance up to 1500 Hz. ![]() Made from semi-continuous (Type 434) stainless steel filaments this sock outperforms conventional glass and basalt alternatives at high temperature and is used to insulate and retain the acoustic stuffing. Our 'straight through' silencers contain a perforated tube surrounded by a finely-woven metal sock. We provide the freedom to choose a level of sound that is appropriate to you. ![]() Sound is one of the most important sensations of enjoying a Sports Car. We can improve on the performance (especially on forced induction models) by reducing the internal restriction. We allow personalisation by providing an alternative appearance with different tail-pipe designs and polished silencers. If appropriate we can design the exhaust to allow a worthwhile reduction in the centre of gravity as with our Ferrari 360 and Porsche GT3 SuperSports systems. Superior quality materials allow reduced weight to benefit all areas of performance.įor example, our Lamborghini Murcielago system eliminates over 30 kilos and our Lotus Exige 'Ti' system saves 8.2 kilos - both from the rear of the car & improving balance. We can improve on the materials used to provide longer component life. All car manufacturers are compelled to comply with ever more stringent worldwide emission and sound regulations and now seem to apply the strictest of these to all their models.
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