What F1 can learn from IndyCar's downforce U-turn As Formula 1 assesses what it needs to change to improve racing for its 2021 rules revolution, America's premier single-seater series is an important study in careful car design 1524182400 F1

F1's forgotten Ferrari-inspired revolutionary An unloved Formula 1 project caught the eye during a recent visit to Italian design specialist Pininfarina. Although it never raced, the Sigma was a glimpse into a better, safer future 1520985600 Engineering

The emerging threat to IndyCar's giants Penske, Ganassi and Andretti have long monopolised the IndyCar title wins, but as the series enters its latest new era there's a new challenge emerging - one with a very different approach to the current big guns 1520380800 IndyCar

Can the Mercedes of NASCAR be stopped? The effort that went into Toyota's 2017 NASCAR challenger, not to mention its success, drew Formula 1 comparisons last season. Chevrolet's relying on its own new car to turn the tables in 2018 1518739200 NASCAR

How IndyCar avoided another needless car war A new car getting rave reviews when it's really an old car in new clothes? That's how bad IndyCar's first effort was with the current base chassis - and how much better its approach to the aerodynamic cloaking has got since 1517788800 IndyCar

Why NASCAR is at a crossroads in 2018 Yet more star names off the grid, declining TV audiences and a need to revive trackside interest - 2018 poses a huge challenge for NASCAR, but there is a prosperous future if it makes the right moves 1515628800 NASCAR

F1's major engine controversy explained The idea that some Formula 1 teams have been burning oil as fuel to boost performance has been an ongoing controversy of the V6 hybrid era. Here, F1 Racing columnist PAT SYMONDS explains the history of this dark art and just how squads have been exploiting the rules 1524614400 F1

How to 'damage' the opposition in qualifying DTM ace Jamie Green explains how drivers can gain a psychological edge over their rivals in qualifying 1524614400 Performance

Why Bottas and Raikkonen should be seriously worried In normal circumstances, the starts Valtteri Bottas and Kimi Raikkonen have made to the F1 season would augur well for contract extension talks. Unfortunately for them, there's another driver without a deal for 2019 who has put them in the shade so far 1524614400 F1

Was the pre-season F1 testing picture wrong? Your latest questions tackle Gary's pre-season predictions, his recent comments about Daniel Ricciardo, why talk of flat-out racing returning to F1 is false, how to deal with Max Verstappen and whether track walks are really necessary 1524528000 F1

Why Ferrari's F1 quit threat is real this time A Ferrari president issuing a threat to quit Formula 1 is nothing new, but JAMES ALLEN says the culture of the team under Sergio Marchionne's control means his ultimatum feels a lot more serious 1524528000 F1

Why F1 is on 'disruptive' Aston Martin's radar Aston Martin has upgraded from innovation partner to title sponsor of Red Bull. But since the engine is a rebadged Renault, what value can the iconic car manufacturer derive from being involved in Formula 1 apart from securing the services of engineering legend Adrian Newey to collaborate on the Valkyrie supercar project? And what value can Aston bring to F1? 1524528000 F1