Anti-Lag System - Ignition Delay - Explained

How does an anti-lag system work? What is an anti-lag system? In the video I explain one type of ALS, which uses an ignition timing delay in order to maintain the boost levels provided by the turbocharger for the engine.

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[Nutguy95]

If i had a a injector that just injected fuel vapors into the exhaust wouldn't that do the same job ?

[EngineeringExplained]

I suppose, but you need air in there as well, and that would also cause you to have more fuel injectors/fuel lines. Probably more safe and cheaper to just run air lines.

[noobpies137]

So are ALS something that is always happening? like is your ignition always delayed or is it only for launching the car or only when you are off the throttle?

[EngineeringExplained]

No, not always happening. Basically when you let off the throttle it will kick in, so that you can maintain boost while switching gears.

[Mulac19]

Surely this could cause fuel to still be ignited at the point which it passes through the turbine? Isn't that bad? :S and also is ALS purely ECU or is there some mechanical component required?

[EngineeringExplained]

Yes, it's bad (not ideal). And there are programmable and physical options: check my video ALS bypass valve.

[barbargnr]

can I have both anti-lag system and a bov??

[sodemoot]

Your teacher will be proud of you :)

[fightingfalconfan]

just for the dummy behind the weel to feel like he looks cool. Normally N/A engines don't have it because there is no turbine to keep spooled up for a boost preassure.

[FullMetalJacket79]

Do you feel this ALS eventually leads the turbine failure?

[AidanMC1995]

Nice hickie ;)