What Is Two Step? Rev Limiters Explained

What are two-step rev limiters? How do rev-limiters work?
How To Launch A Manual Car -    • How To Launch A Manual Transmission Car  
Subscribe for new videos every Wednesday! - https://goo.gl/VZstk7

Related Videos:
Anti Lag System: Ignition Delay -    • Anti-Lag System By Ignition Delay - N...  
Anti Lag System: Bypass Valve -    • How Anti-Lag Systems Work - No More T...  
Why Cars Backfire -    • Why Do Cars Backfire?  
Why Cars Spit Flames -    • Why Cars Backfire - Afterfire - Expla...  

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:   / engineeringexplained  
Official Website: http://www.howdoesacarwork.com
Twitter:   / jasonfenske13  
Instagram:   / engineeringexplained  
Car Throttle: https://www.carthrottle.com/user/engi...
EE Extra:    / @engineeringexplainedextra  

NEW VIDEO EVERY WEDNESDAY!