Anti-Lag System, Just a quick Question Options

[bsamps4]

First off: I'm not trying to start a conversation on how to get the anti-lag system available in the WRC model to work.

While painting the non-wrc manifold that i bought earlier this year I decided to tear into my WRC manifold to see how it works. I was suprised to find that when I unbolted the 4 large bolts that hold the piping for the anti-lag on that mine were not "blanked out". Everywhere that I've read says that the anti-lag manifold is blanked so to speak and that there is no pass-through for air flow. Just kind of confused. Anyone else with a WRC that took a second look at their manifold? Mine is wide open and the bolt that I pulled has a port to the top where it actually appears that exhaust gas has flowed through the maze of piping that goes to the valve that sits next to the water cooler.

[Neon90424]

If im not wrong theres like a bypass valve that blows cool air into the manifold thru those pipes and a special ecu would trigger it...rich condition and spark if im not wrong...theres are write up some where...

Anti-Lag

The Group A was the first production car I know of with anti-lag standard, although again not operational. The system uses an ECU signal to switch two VSV's on the back of the block which provide vacuum (via a canister) to the special bypass valve fitted right beside the entrance to the IC. This heavy duty metal valve has a poppet valve which when opened directs some of the air (which usually all goes through the BOV) down four metal tubes into the exhaust manifold. A special manifold has a hole just after each exhaust port. A small heatshield sits between the manifold and the intercooler.

How do you make it work? You don't.

Anti-lag is *very* hard on turbos due to the shockwaves and high temperatures produced. Unless you have a rally team budget, forget it.

Here is some of what you need to do to activate it. My bypass valve seems to be jammed shut, maybe it has an internal spacer to stop it opening. The fittings connecting the pipes to the manifold are also not drilled though. With those aspects fixed the system will mechanically work. The VSV's are wired to the ECU, however an aftermarket ECU is needed to apply 12V to make them work. I'm guessing that (like most systems) the ECU retards the timing while continuing fuel injection. The mixture burns in the manifold, keeping the turbo spinning. This is very harsh on the system, therefore the pipes are just to supply cool air to keep temperatures down (conjecture!).