What Is Two Step? Rev Limiters Explained

What are two-step rev limiters? How do rev-limiters work? How To Launch A Manual Car - https://youtu.be/54I5RU-RNhQ Subscribe for new videos every Wednesday! - https://goo.gl/VZstk7 Related Videos: Anti Lag System: Ignition Delay - https://youtu.be/wyJn40ExwZY Anti Lag System: Bypass Valve - https://youtu.be/5g6cHs5vMRE Why Cars Backfire - https://youtu.be/XVDXLW3P7q8 Why Cars Spit Flames - https://youtu.be/bgS3PA5r0vY Two-step rev limiters have two separate RPMs for which a rev limit is set, depending on certain conditions. Typically the first rev limiter is used when the car is stationary, as launch control. The second rev limiter is the redline (or slightly past) there to ensure you don't damage the engine by over-revving. Rev limiters work by either limiting fuel, or limiting spark. You can run a lean A/F mixture, or cut fuel entirely. Likewise, you can retard spark timing, or kill the spark entirely, but this means unburnt fuel will exit the exhaust, thus leading to pops and crackles as the unburnt fuel ignites with the outside air. Two step is not by design an anti-lag system, but by significantly retarding the timing, it can act very similarly, and achieve the same goal, though only for launches. Once the vehicle is moving, the system will not attempt to maintain boost during shifts, as traditional anti-lag systems would. Don't forget to check out my other pages below! Facebook: http://www.facebook.com/engineeringexplained Official Website: http://www.howdoesacarwork.com Twitter: http://www.twitter.com/jasonfenske13 Instagram: http://www.instagram.com/engineeringexplained Car Throttle: https://www.carthrottle.com/user/engineeringexplained EE Extra: https://www.youtube.com/channel/UCsrY4q8xGPJQbQ8HPQZn6iA NEW VIDEO EVERY WEDNESDAY!