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ARPlogo_White_2013.tif ARPlogo_Black_2013.bmp Click the paper clip ARPlogo_White_2013.bmp ARPlogo_Black_2013.png to view and save them to ARPlogo_White_2013.png 25 years as the leading motorsportyour computer. technology publication ARP CMYK Colors 7 C: 10 C: 100 C: 100 Y: 100 Y: 0 Y: 0 Volume 25 Volume M: 100 M: 20 M: 0 K: 0 K: 0 K: 0 ARP Pantone Colors Pantone 485 C Pantone Process Blue Coated Pantone Yellow Coated Updated: March 14, 2013 25YEARS OF INSIGHT July 2015 • Vol 25 No7 • www.racecar-engineering.com • UK £5.95 • US $14.50 9 7 7 0 9 6 1 1 0 9 1 0 4 Le Mans 2015 0 7 Joest Porsche 956B Joest Porsche New aero approach for Audi’s R18 contender Audi R18 2015 edition Audi Formula 1 in CFD Formula July 2015 Porsche 1985 Formula 1 analysis Formula E fi nale Reinhold Joest reveals the We use OpenFOAM CFD to Electric racing in the spotlight secrets of his Porsche 956B examine modern era cars as new rules are analysed RCE July_01AC.indd 3 26/05/2015 16:31 NEW The Dry Sump Vacuum Race Hose ProPLUS Xtreme A high flowing, smooth bore, PTFE tube with external convolutions for flexibility. 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[email protected] tel 562 861 4765 fax 562 861 5503 ® EUROPE JLS Motorsport [email protected] tel 44 (0) 121 525 5800 fax 44 (0) 121 525 4833 THE XTREME IN RACECAR PLUMBING Untitled-60 1 05/03/2015 09:15 CONTENTS – JULY 2015 – Volume 25 Number 7 The 99th Indianapolis 500 passed without major incident, but there were issues in practice that worried series organisers COVER STORY 8 Audi R18 WEC title contender from Ingolstadt COLUMNS 5 Ricardo Divila Looking at his own three score and ten birthday 7 Mike Blanchet Considers the plight of the race engine builder FEATURES 18 Porsche 1985 Putting to bed the rumours behind Joest’s victory 26 Nissan Test Ben Bowlby on what happened to the Nissan GT-R LM 32 Nürburgring tyres GT3 tyre war erupting in the VLN? 34 Lotus E23 Fixing the 2014 E22 and fitting it with a Merc engine 69 3D Printing The latest development in an established technology 42 Formula E rules Next step in the electric series development plan 75 Danny Nowlan Considers how to get the most out of simulation 45 Formula E Cranfield Top university’s Group Design Project analysed 80 Tech update What caused the IndyCars to fly at Indianapolis? TECHNICAL BUSINESS NEWS & PEOPLE 49 Consultant Can a front-wheel-drive LMP work? 85 Industry News 53 Databytes F1 looks to re-introduce refuelling; BMW to return to Le Mans How to set up a multiple speed limit programme 90 Racecar People 57 Aerobytes ACO President Pierre Fillon explains all The last of the VUHL analyses 97 Products 60 F1 CFD The latest products from the world of motor racing Unlocking the secrets of Formula 1 design using CFD 98 Bump Stop Subscribe to Racecar Engineering – find the best offers online www.racecar-engineering.com Contact us with your comments and views on @RacecarEd or on Facebook.com/RacecarEngineering JULY 2015 www.racecar-engineering.com 3 Contents July STAC2.indd 3 27/05/2015 12:21 POLE PRECISION www.avl.com/racing Untitled-31 1 15/04/2015 12:21 STRAIGHT TALK – RICARDO DIVILA Je ne regrette rien Three decades of life in the fast lane have left their mark – it’s been one hell of a ride e Mans is a mistress that I have been monocoques with aluminium honeycomb challenging tasks done in exiguous time frames, visiting for 32 years or 11,684 days, which panels before mutating into today’s carbon- where you learn to depend on your team-mates. L is a sizeable chunk of the 25,581 days, 15 composite honeycomb structures. Optical intuition I took to heart Sextus Propertius’ exhortation “Let hours, 0 minutes that I have been on this planet. aerodynamics morphed into using cutting edge each man pass his days in that wherein his skill is During that period the gap that separates Europe ground-effect wind-tunnels and CFD to produce greatest”, thus probably depriving the world of and the Americas has widened by 80.23cm thanks absurd levels of grunt. Engines that were at the another second-rate driver and drifted instead into to Tectonic plate movement and the earth has pointy-edge of ICE technology have evolved from racing car design and my real love, aviation. travelled 30 billion kilometres around the sun. lumps that had a specific output, 108.26bhp per Without really knowing how it happened, apart Coincidentally the Le Mans test day on May litre, into today’s 375bhp per litre units, using 30 from enjoying every moment of the trip, I passed 30 will be the day I achieve my biblical three score per cent less fuel. from being a promising young designer into a and ten, hitting my sell-by date and voiding all It also gave me an opportunity to travel the grizzled veteran. Tempus fugit… manufacturers warranties. Hence this column. world and visit a slew of racing tracks, 162 at The first intimations of mortality were when During this period I must admit to spending far the last count, meeting interesting people from racing at Pau, quite a few years ago, and finding the too much time in racing team garages grid of the historic sportscar workshops and pits, but quoting Oscar It amuses me to think there are few race was almost entirely made Fingal O’Flahertie Wills Wilde “One day up of cars of I had worked your life will flash before your eyes. Make people in a racing paddock nowadays on, although, of course, there sure it’s worth watching,” and boy has it were a few exceptions. been so – I’ve loved being able to play that can true a Borrani wire wheel The fact that presidents with everything from karts to F1. and prime ministers are also When I was 12 I began working on now routinely younger than a fMaserati 250F, chassis #2322, which me does not quench the idea now resides in a private collection that I am but a youngster – it’s after being raced for a while in South just a shame that the mirror America, part of the time as a ‘Mecanica contradicts this idea every Continental’, in which the thoroughbred time I shave. Italian machinery had an American V8 Doing a rapid appraisal of transplanted in the interest of easier the past decades just spurs maintenance, what with Modena being a me on to make use of the next long way away. decade to work on even more interesting projects, do more A road well travelled weekly races and find new My first race with it was the Sao Paulo mechanical, logistical and GP of 1957, where we finished fourth. tactical problems to solve. One Juan Manuel Fangio won the race Continue to question and he also collected several world everything, learn something championships, proving throughout his Stonehenge and Divila – two ancient monuments that are still going strong in 2015 and answer nothing, as career that the old adage was true – form Euripides once said. is temporary, but class is permanent. all nationalities and walks of life along the way. Go motor racing? Yes young engineers, it will It amuses me to think there are few people There is a vast panoply of different characters break your heart when you lose, but the satisfaction in a racing paddock nowadays that can true a attracted to fast machines, the people who build, engendered when all the concepts work, all the Borrani wire wheel, one of my duties at the time. maintain, sponsor and design fast cars. Plus, the parts fit and you bring your steed home at the The Maserati also had a new-fangled Plexiglas drivers themselves are interesting creatures – the top of the pile are priceless. It will accelerate your windshield, and setting it up consisted of changing successful ones, the gifted but unlucky ones and growth, give you a new measure of just what you the tyre pressures and setting the float levels on even the run-of-the-mill ones, all individuals, and are really capable of and will spur you on to new the Weber Doppio Corpo carburetors, with any thus subject to all the foibles that define humanity. efforts. It will also give you a random walk through other handling foibles being corrected by the Drivers show an endearing lack of restraint with the thickets of chance, the kind of uncertainty that driver’s steering and foot pedal artistry. the spraying of champagne to mark their territory might interest a guy named Werner Heisenberg. I have seen what was a nice game for budding or spoils, or at a deeper level the ejaculate of Once you get an adrenaline addiction and start enthusiasts and engineers turn into a mainstream orgasm.