Search Results

Full Exhaust Systems GoodFabs has been making full race exhaust systems for race teams since 1984 - including over 30 years for Formula 1. ​ We currently fabricate, assemble and organise all sourcing and finishing (heat treatment, shot peening, coating) of machined, 3D printed, pressed, formed and cast components that make a full system.​ We supply exhaust parts, including full systems to Indy Car, Le Mans, WRC, RallyCross and various Touring Car series. In 2019, we designed, fabricated and supplied the full exhaust system for BTCC winners, West Surrey Racing.​ We can design or help design a system from scratch or work from fully designed CAD drawings supplied by the customer.

CMM INSPECTION LASER ETCHING LASER SCANNING NDT MATERIAL TRACEABILITY Laser Scanning Using the latest FARO Edge Arm laser scanning attachment, GoodFabs collects point cloud data on actual fabricated exhaust or machined components. A detailed colour map showing tiny differences between the CAD model and the fabricated component can be generated with the collected data. A full inspection report on the deviations produced using PolyWorks software gives a perfect insight for the customer’s engineer to evaluate the tolerances. Not only are the finished exhausts or machined parts inspected; throughout the full fabrication process, the welding fixtures, inspection fixtures and any in-house machined rings, machined bosses or other components are fully inspected before they are used. This laser scanning capability enables GoodFabs to deliver high quality, hand-fabricated and welded components of the highest standard. Laser scanning for inspection with FARO Edge Arm Laser scanning for inspection with FARO Edge Arm Laser scanning a DMLS collector Software report generated from laser scanning Laser scanning DMLS parts with FARO Edge Arm

SHOT PEENING HEAT TREATMENT Shot Peening Shot peening is a separate cold working process designed to increase the exhaust life cycle by producing a compressive residual stress layer on the outer surface, which modifies the mechanical properties of the metals. The residual tensile stress from welding metals such as inconel, stainless steel and aluminium is created because the weld consumable is often applied in a liquid state. The welding process heats the metal and the weld is applied in its hottest, most expanded state. When the much cooler consumable material is bonded to the base material, the weld tends to cool rapidly and will attempt to shrink from the ‘drop-in’ temperature. Because the base material is usually much stronger and not in a molten state, this cannot shrink, leaving the material remaining in a highly stressed “tensioned” state. This zone is usually just next to the weld joint, which explains why a crack may appear close to the weld. Shot peening process, image courtesy of Sandwell Ltd . The Process The shot peening process impacts the metal surface with small pellets (round metallic, glass or ceramic particles) with a high enough force to deform the surface plastically. A compressive layer is generated when the impact of all the particle shots produces small indentations in the top surface layer. The layer beneath the top surface is then compressed, generating a compressively stressed layer underneath the shot peened area. This layer helps to prevent the stressed area from cracking as a crack cannot propagate in a compressive environment. The shot peening process has been proven to be very beneficial in many components operating in a highly-stressed environment such as motor racing. Typical Behaviour The graph shows a typical situation of a welded metal component before and after shot peening. ​ As can be seen from the graph, the residual stresses in the welded metal are positive, which puts the surface layer in a tensional state. When shot peened, the material is compressed and the residual stresses are negative, putting the material in the compression state where the cracks cannot propagate. This graph illustrates how the residual stresses after shot peening are the most negative in the layer underneath the shot peened top layer and gently increase as we go deeper into the material. This graph does not refer to any specific material and is purely for illustration purposes. Quality Standards All shot peening processes are rigidly quality controlled and regulated by a series of SAE standards that control the process, media used, etc. Shot Peening Media SAE-AMS-2431. Automatic processing SAE-AMS-2430 Computer controlled processing SAE-AMS-2432 Almen Strips & Gauges SAE-J442 Almen Strip usage SAE-J443 GoodFabs can manage both the shot peening and heat treatment processes as part of an exhaust programme for a race team or engine builder. Inspection is normally required both before and after heat treatment and shot peening, so we coordinate both procedures prior to final delivery of the finished and inspected part to the customer. Certificates of Conformity For both shot peening and heat treatment processes , we provide customers with certificates of conformity to ensure full traceability across the whole of the manufacturing process.

ALUMINIUM BENDS INCONEL BENDS STAINLESS STEEL BENDS TITANIUM BENDS Stainless Steel Bends We stock various diameters and wall thicknesses of 304 stainless steel tube and can mandrel bend any combination that you can see in our tooling chart . We form our own 321 stainless steel tube so we can make any diameter, although some wall thicknesses may not be available. You can also browse our online shop . If you need bends and tube sizes that are not included in the tooling chart, please contact us on info@goodfabs.com and we'll do our best to accommodate your requirements. TOOLING CHARTS BEND REQUEST FORM

Contact Us If you have any questions about the products and services we offer, please get in touch by phone or email, or use the contact form provided. You can also follow us on our socials. +44 (0)1844 202850 info@goodfabs.com Office & Workshop Address Good Fabrications Limited Unit 3a Drakes Farm Drakes Drive Long Crendon Aylesbury Bucks HP18 9BA Contact Form Name Email Contact Number I would also like to subscribe for updates. Submit Thank you for contacting us. We will get back to you as quickly as possible. Privacy Statement

CMM INSPECTION LASER ETCHING LASER SCANNING NDT MATERIAL TRACEABILITY Laser Etching A robust part-marking mechanism is key to material traceability and quality control. We have the latest laser etching capabilities to ensure that every fabricated or machined part which leaves us is part-marked to customer specifications. Because laser etching does not actually touch or damage the outer surface and no chemicals or inks are used, we can ensure that all parts remain at the highest possible quality.​ All our machined or laser-cut parts and fixtures are made either in the GoodFabs in-house machining department or by sub-contractors and can be marked to ensure that every single component in a fully welded exhaust system can be traced and the life of all the components can be logged.

CNC Machining The fabrication of exhaust systems involves many machined parts. Clamp rings and bosses, for example, are constantly required on many development exhaust systems. We make jigs for every part, which are machined in-house along with complex press tools. At GoodFabs, we have invested in multiple CNC turning centres, as well as 3-axis and 5-axis CNC machines, which enable us to machine all the necessary components to supply completely finished exhaust systems. On top of our in-house machining capability, we work closely with several specialist machining companies who are used to producing high-quality parts in aluminium and stainless steel, and exotic materials such as inconel and titanium, within very tight timeframes to ensure that the complete exhaust systems can be delivered quickly. With new technologies such as laser sintering becoming a major part of modern F1 exhaust systems, much of our in-house work involves machining complex DMLS parts for use as Formula 1 components. Our team of machinists work to supply our own fabricator/ welders with components that are immediately inspected and often welded within hours of production to exhaust assemblies that need to be delivered or sent to post-fabrication processes such as heat treatment, shot peening and thermal coating. GET IN TOUCH Stainless steel v-band rings Aluminium Turbine Tools used in the machining department Preparing to machine aluminium tooling plate Inconel swarf residue Inconel swarf residue Inconel, titanium, aluminium and stainless steel billet and plate Inconel, titanium, aluminium and stainless steel billet and plate Programming a Doosan CNC lathe Mixed metal swarf residue separated after machining process

Welcome to GoodFabs GoodFabs is an ISO 9001 accredited company based in the Motorsport Valley in the UK. We employ 30 staff dedicated to the design and manufacture of exhaust systems for engine builders, race teams and supercars. Founded by Steve Good – an ex-McLaren fabricator – in 1982, GoodFabs has worked within top level motorsport for 40 years, including Formula 1, NASCAR and IndyCar, even supplying every car in the Indianapolis 500 at one point. Part of GoodFabs’ success is our skill with nickel and titanium alloys in the most lightweight forms, combined with probably the most experienced workforce and best-equipped workshop outside of the aerospace industry. We have a long-standing reputation in motorsport for fabricating thin wall specialist alloys. We are one of the only companies in the world that can bend, fabricate, press, machine, laser cut and weld inconel in wall thicknesses of 1.6mm/ 16swg/ .064 to under 0.5mm/ 22swg/ .022. As a development partner for engine builders and race teams, we help design and fabricate exhaust systems manufactured with maximum flexibility for adjustment. Race systems are then a natural progression, which we can produce in small to medium quantities. We have experience in many different race categories worldwide, including NASCAR, IndyCar, Rallycross, World Rally Cars, Touring and GT cars, Le Mans prototypes, one-make championships and F1. We also produce systems for supercar companies around the world. Outside of motorsport, our expertise with specialist alloys has seen us work on a range of parts used within the marine and oil and gas sectors. The award-winning journalist, Ian Wagstaff, specialising in motorsport and the automotive components industry, has written a full history of GoodFabs and how we became one of the world’s leading fabricators of exhausts for motorsport as well as a top manufacturer of tube and custom bends. We have also created an illustrated timeline of The GoodFabs Story .

ALUMINIUM BENDS INCONEL BENDS STAINLESS STEEL BENDS TITANIUM BENDS Aluminium Bends Our tooling chart details what we can bend with our current tooling and with the 1.6mm wall aluminium tube that we stock. Other aluminium wall thicknesses, such as 1.2mm are available, but the achievable bend angles may change (maximum bend angles are in the yellow cells which also indicate what tooling we have). If you need bends and tube sizes that are not included in the tooling chart, please contact us on info@goodfabs.com and we'll do our best to accommodate your requirements. TOOLING CHARTS BEND REQUEST FORM

SHOT PEENING HEAT TREATMENT Heat Treatment Heat treatment is a process where metals such as inconel, stainless steel and aluminium are heated and cooled in a fully controlled environment, to change their microstructure and to bring these metals closer to their equilibrium state, or bring out more of their physical and mechanical characteristics. There are different heat treatment processes available. This page only outlines the annealing for stress relief of residual tensile stresses due to welding. In our Technical Centre , other types of heat treatments are discussed. A generic heat treatment furnace, image courtesy of Tamworth Heat Treatment . The Process The residual tensile stress from welding inconel, stainless steel or aluminium is created because the weld consumable is often applied in a liquid state. The welding process consists of heating up the metal and applying the weld in its hottest, most expanded state. When the much cooler consumable material is bonded to the base material, the weld tends to cool rapidly and will attempt to shrink from the ‘drop-in’ temperature. Because the base material is usually much stronger and not in a molten state, this cannot shrink, leaving the material remaining in a highly stressed “tensioned” state. This zone is usually just next to the weld joint, which explains why a crack may appear close to the weld. Typical Behaviour The graph shows a typical situation of a welded metal component before and after heat treatment. ​ As can be seen from the graph, the residual stresses in the welded metal are positive, which puts the outer surface layer in a tensional state. When the metal is heat treated in a controlled environment to stress relieve the residual stresses, we can see that the metal reaches an equilibrium state and the residual stresses are close to zero. This graph does not refer to any specific material and is purely for illustration purposes. Combining Heat Treatment With Shot Peening Heat treating an exhaust system can enhance its properties. Annealing can soften a part and make it more flexible and less prone to cracking, while other treatments may make it stronger. Heat treatment is typically carried out overnight although some processes may take significantly longer. Combined with shot peening , which sometimes follows heat treatment on the same day, the material properties may be enhanced even more, as illustrated in the above graph. GoodFabs can manage both these processes as part of an exhaust programme for a race team or engine builder. Inspection is normally required both before and after heat treatment and shot peening, so we coordinate both procedures prior to final delivery of the finished and inspected part to the customer. Certificates of Conformity For both heat treatment and shot peening processes , we provide customers with certificates of conformity to ensure full traceability across the whole of the manufacturing process.

Replica F1 Halos As F1 Halos are an expensive FIA mandated part - made in titanium for race use - we were asked to make aluminium replicas for an F1 team with a number of show cars that also travel the world. GoodFabs worked on the development of the original halo while still in the concept stage and as such, has all the equipment CNC machining and fabrication skills to manufacture exact copies at a fraction of the price. Contact us for more information and a quotation. A GoodFabs Aluminium replica F1 Halo GoodFabs CNC Machine replica Halo's in Aluminium A GoodFabs Aluminium replica F1 Halo GoodFabs CNC Machine replica Halo's in Aluminium A GoodFabs Aluminium replica F1 Halo GoodFabs CNC Machine replica Halo's in Aluminium A GoodFabs Aluminium replica F1 Halo GoodFabs CNC Machine replica Halo's in Aluminium A GoodFabs Aluminium replica F1 Halo GoodFabs CNC Machine replica Halo's in Aluminium A GoodFabs Aluminium replica F1 Halo GoodFabs CNC Machine replica Halo's in Aluminium

ALUMINIUM BENDS INCONEL BENDS STAINLESS STEEL BENDS TITANIUM BENDS Titanium Bends As thin wall titanium tube tends not to be available in small quantities, we manufacture our own tube from flat sheet, which is then seam welded. Using our extensive range of mandrel bend tooling - see tooling chart - we then custom bend tube for our own use and for customers worldwide. Click here to find out more about out our tube forming and bending processes . ​ We use Grade 2 titanium for bends. If you need bends an d tube sizes that are not included in the tooling chart, please contact us on info@goodfabs.com and we'll do our best to accommodate your requirements. TOOLING CHARTS BEND REQUEST FORM