Originally Posted by flipmode

pure orgams




this car would give the Evo X a run for its money.

Originally Posted by gte123v

Anti-lag is basically an induced backfiring system. By making the engine run rich in fuel, the uncombusted fuel is pushed through the exhaust valves and into the headers (this is where is all happens), since the headers are glowing red hot, the fuel will ignite which in turn creates more exhaust gas to spin the turbos (this is where the back-fire comes from). However, this is not on all the time, only during cornering and such when you have to let go of the throttle and re-apply again. Ofcourse, all of this is controlled by a computer with a lot of sensors so it will know exactly when to let the engine run rich. It's a very impressive system but it's very destructive to the headers and the valves.

Originally Posted by Prodrive (via subdriven.com)

Turbo-charged engines tend to run with a rich fuel mixture and, as a result, some of this fuel remains unburnt and ends up in the exhaust. At low engine speeds, when turbo-lag is experienced, the anti-lag system can introduce ambient air into the red hot exhaust manifold causing this fuel to spontaneously combust. This increases the manifold pressure, spinning the turbo back onto boost.

Originally Posted by Prodrive (via subdriven.com)

"Unfortunately, transferring the system to a road car was not as straightforward as it might seem," said Prodrive powertrain engineer, David Hemming. "In a World Rally Car, our drivers are either fully on or off the accelerator and not concerned about how smooth the power delivery is. For motorists this is definitely not the case and an unmodified system would provide an unacceptable driving experience."

Prodrive spent six months developing the system on an engine on a transient engine dynamometer at its Milton Keynes test facility. During this time engineers managed to achieve closed-loop control of the turbo boost and make it work in a road car application. The system is so refined that it can control the turbo speed to within one per cent at almost any engine revs.

"The system is not ready for production yet, but it has shown great potential. It will make P2 far more flexible to drive as without the turbo-lag you don’t have to drop down a gear to get the acceleration you want," said Hemming.

As well as enhancing the performance of turbo-charged cars, in the longer term it could provide a solution to the downsizing of engines in cars and so help improve fuel economy and reduce emissions.

"With an anti-lag system, you could in theory replace a normally aspirated, two litre engine with a turbo-charged one litre engine. This would typically reduce fuel consumption by about 25 per cent without any loss in performance," said Hemming.

Prodrive is already talking to a vehicle manufacturer about the application of this system.