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3 “The air-cooled cars have made an incredible comeback, so we’re dusting off fixtures to build what we started out with” TODD KNIGHTON, PROTOMOTIVE ENGINEERING PAGE 86 CONTENTS : NOVEMBER 2020 04 Intro: THE EDITOR We ask how long it will be until all-electric cars rival Formula One and Le Mans? The writing’s on the wall 06 Grid: IN THE NEWS Toyota, Glickenhaus and ByKolles limber up with their Hypercars, Honda quits Formula One but confirms its commitment to IndyCar, and much more… 18 In Conversation: ROB FLYNN Rob Flynn reveals the art and science of Top Fuel engine engineering. By Ian Bamsey with research trackside by Anne Proffit 22 Dossier: FORD FPS 410 SPRINT CAR V8 Mike Magda charts the development of this potent Tony Stewart Racing World of Outlaws championship contender 36 Focus: ADDITIVE MANUFACTURING OF ENGINE PARTS Improvements in processes and materials show that AM is a technology whose time has come. Wayne Ward reports 46 Insight: 24-HOUR PROTOTYPE ENGINES 2020 Ian Bamsey investigates the Prototype engines at the 2020 Daytona and Le Mans 24-hour races. With additional research by Anne Proffit at Daytona 56 Insight: PMWE 2020 Ian Bamsey reports on what would have been revealed this year at the expo if it had been able to go ahead 64 Focus: CLEANING ENGINE COMPONENTS Peter Donaldson explains the importance of removing every trace of contaminants from motorsport components, and the methods available 72 e-RACE POWER EXPO Details of the powertrain specs for the upcoming PureETCR series, CRP Technology’s role in the battery for MotoE, and XING Mobility unveils a Lego-like modular battery 78 Challenge Of: ELECTRIC DRAG RACING Electric dragster technology may still be in its infancy but already one racer has broken the 200 mph limit. Wayne Ward examines their car’s development 86 RACE ENGINE RETRO Bentley produces 12 ‘continuation’ versions of its iconic Blower Le Mans racer, Biggel Engineering takes to cylinder head scanning and mirroring to help restore a Volvo 142 Group 2 rally car, and Protomotive Engineering applies CAD, CNC and AM to classic air- cooled Porsches The covers of this magazine have had a Cellomed anti- microbial coating applied. This coating is specifically designed to stop the spread of bacteria on printed matter. It employs a silver-based formulation to protect against the survival of microorganisms on the print surface. Its anti-bacterial, anti-viral and anti-fungal properties will not diminish throughout the life of the magazine. “Sprint Car motors are so powerful that when you first get to the track and it’s pretty heavy, you can use all the motor” RON SHAVER PAGE 22 “A DC system might have performance advantages, but the longevity and robustness of AC motors is important” STEVE HUFF PAGE 78 “We look at where we can improve durability and potentially increase engine mileage, balanced against cost” MATTHEW WILES, ECR ENGINES PAGE 46 “The only developments for the AR35TT in 2019 were in the software, for using the engine better on track” MARK CRAWFORD, HPD PAGE 46