3 ms·

Zero turbo lag is everything in drag racing. https://youtu.be/zPNrBuuQCnw https://youtu.be/zPNrBuuQCnw

• sanguy 6y ago
  In a drag turbo setup they solve the lag by spooling the turbo off compressed air so at launch they are already into boost.
• bigiain 6y ago
  I'd guess in a very different way to circuit racing's requirements for zero turbo lag though? They'd be "I need enough boost while staged on the line that I've always got traction-breaking torque available when and for as long after I launch as possible", rather than "I need to be able to smoothly get from off throttle to 30% throttle as I pass the apex, then from 30 up to 100% as I exit turn 4"... Back in the 90s (and maybe still, I've lost touch) rally cars used to do off throttle "anti-lag" by using the direct fuel injection to pump fuel into the cylinders during the exhaust stroke, so it'd burn in the exhaust manifold and keep the turbine spinning to make boost without needing the engine to be creating torque by burning the fuel in the ignition strokes... They had less hard requirements for gradual application of torque than circuit race cars though, they mostly wanted to be able to get back on the throttle exiting a corner and immediately start spinning all 4 wheels again.