The art of manufacturing spindle
How CRP Group and CRP USA applied their collective talent and knowledge in the world of Stock Car Racing: the result is a stronger, lighter spindle that doesn’t require additional fabrication to be race ready.
Nascar is the largest sanctioning body of Stock Car Racing in the United States. With cars racing at speeds above 180 mph (290 km/h) at full throttle envelops fans in a full sensory experience. This high speed sport, where drivers race side by side and occasionally nudge each other out of the way to move ahead, is what makes the series the most popular racing in the US.
High speed, adrenaline, love for cars, are the feeling that millions of fans experience every time motors roar under colourful sponsors that cover the cars. The popularity of stock car racing is finding its way across the pond and more precisely gaining attention in the Italian MotorValley where the tradition, passion and culture of motorsport has very deep roots. Among the companies that have contributed to make this piece of land a mecca for racing enthusiasts, there is CRP Group that for over three decades has been synonymous with quality and technical manufacturing throughout the world of top tier European motorsports. More recently, the staff at CRP has started to investigate where they could apply their collective talent and knowledge in the world of Stock Car Racing. And they have succeeded!
The front spindle assembly submitted by CRP USA, has been approved for use in competition in all 3 of Nascar’s Top National and Touring Series effective 1/1/2010.
CRP Group and CRP USA front spindle
Having spent the winter of 2008 and spring of 2009 meeting with teams and familiarizing themselves with the anatomy of a stock car, the antiquated spindles stood out in all the conversations (more commonly known in Europe as uprights). Since the late 1990s, teams knew the OEM style two-piece design was underperforming at modern speeds and corner loads. Many teams began undertaking laborious, and costly, secondary manufacturing processes to reinforce against camber compliance. The arrival of the safer COT cars, with their higher center of gravity, compounded the old problems and introduced a few new ones.
CRP’s consultant, Roberto Cevolini, saw an opportunity to leap into the Stock Car racing market in an area that they already knew very well, high structural load racing components, specifically- uprights. As a result, the design department in Modena, Italy has been applying their special blend of function and elegance to this modern day motorsports dinosaur–the stock car spindle.
The CRP design team set to work, consulting with top team engineers, and keeping close contact with Nascars’s approval committee representatives. Many of the tools that CRP had pioneered in recent years had to be left on the shelf. Precision titanium investment casting and super strong metal matrix composites wouldn’t be allowed. Nascars rules specifically called for “Magnetic” Steel, a daunting constraint, but the bulky industry standard parts had plenty of room for improvement in both mass and strength.
Manufacturing began with a universal near-net-shape investment casting that cuts down on material waste and machine time. All components are subjected to a stringent quality control screening with 100 percent X-ray inspection for porosity and internal defects. At this stage, the finished casting offers a variety of customization options. A variety of standard king pin inclinations will be available, as well as 1″ and 2″ drop snout versions. CRP Group also plans to offer its new spindle in the standard style or the new Timken Race Pack Plus hub.
Condensing the spindle to a single piece casting eliminated considerable unnecessary mass, as well as offering the chance to incorporate thin ribbing uniformly into the design. The result is a stronger, lighter spindle that doesn’t require additional fabrication to be race ready.
CRP Group and CRP USA are proud to present the newest trend in suspension technology for Nascar’s National and Touring teams in December 2009 at PRI in Orlando. Currently in prototype testing, the precision steel casting will be the first of it’s kind made available to the whole garage. Lighter and stronger, and with a variety of geometry options, CRP spindles will be available in both the standard style and new Timken Race Pack Plus hub design. CRP USA is based in Mooresville, NC to better service the US racing market, and continues to provide the most advanced materials and manufacturing techniques available in motorsports, whether it’s F1, or Nascar.