Anti-lag

By messing with things engine side, You create a explosion in the exhaust which spins the turbo when off throttle.
 
Overfuels/cuts spark to generate explosions in the exhaust pipe rather than in the cylinders to keep up the flow of gas through the exhaust pipe, keeping the turbo spooled so that it eliminates turbo lag.

Note that it eliminates lag and not necessarily boost threshold. It is mainly so that there isn't a big hole in power right after you change gear or lift off to navigate a corner and need good throttle response.
 
Basically it cuts the ignition but keeps fuel and air going in just after the exhaust valves open, so unburned fuel is sent down the hot exhaust and ignites...

Basically it keeps the turbocharger spooled by maintaining a flow of hot gas/burning fuel down the back...the pops and bangs you hear are the fuel exploding in the exhaust. Hence flames as well :D

Very hard on the turbo charger though (hence specialist turbo components on motorsport cars, the famed 'Mar-M' alloy shaft for the turbo etc), and leads to high temperatures in the engine and exhaust.
 
Not so much ignition cut, but retarding the ignition by miles so it fires as the exhaust valve is opening, and jacked throttle or throttle bypass to get airflow through the engine.
It's much the same as the off throttle exhaust blowing in F1 these days.
 
Clarkey said:
Not so much ignition cut, but retarding the ignition by miles so it fires as the exhaust valve is opening, and jacked throttle or throttle bypass to get airflow through the engine.
It's much the same as the off throttle exhaust blowing in F1 these days.
Click to expand...

This.
 
Very hard on turbos and creates a lot more engine bay heat

Older systems were the traditional noisey ones with all the popping and banging, newer systems sounds like the F1 cars off-throttle blown diffusers.
Pretty much any GPA rally car has it fitted so easy to find examples.
 
if it sounds too good to be true it most probably is,

creates explosions and fire where there aren't meant to be any, which is never a good thing :)
 
Clarkey said:
Not so much ignition cut, but retarding the ignition by miles so it fires as the exhaust valve is opening, and jacked throttle or throttle bypass to get airflow through the engine.
It's much the same as the off throttle exhaust blowing in F1 these days.
Click to expand...

Glad one of you got it right. :D


Do not do this to a road car or you'll have no brakes and crash.
 
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