i dont really care about true anti lag because of the effects in the long run on the turbo im just mainly wondering about like a two step that shoots fireballs like antilag like can u setup our twosteps to spark cut instead of fuel cut?

 

Here is a good explanation..

"Anti-Lag System, ALS, is a system used on mainly turbocharged racing and rally engines to eliminate turbo lag. It was used in the early days of turbocharging in F1 until fuel restrictions made its use unsuitable. Later it became a common feature in rally cars due to the mandated restrictors on the turbocharger inlet. Because of the pressure drop across the restriction, the pressure ratio for a given boost level is much higher and the turbocharger must spin a lot faster to produce the same boost as before. This increases turbo lag significantly compared to unrestricted turbochargers.

An ALS system requires an air bypass, and generally this is done in one of two ways. The first method is to use a throttle air bypass; this may be an external bypass valve or a solenoid valve which open up the throttle 12-20 degrees. This allows air to bypass the closed throttle and to reach the engine. The second method is to use a bypass valve which feed charge air directly to the exhaust manifold.

The throttle bypass/throttle solenoid system is combined with ignition retardation and slight fuel enrichment (mainly to provide cooling), typically ignition occur at 35-45° ATDC. This late ignition causes very little expansion of the gas in the cylinder; hence the pressure and temperature will still be very high when the exhaust valve opens. At the same time, the amount of torque delivered to the crankshaft will be very small (just enough to keep the engine running). The higher exhaust pressure and temperature combined with the increased mass flow is enough to keep the turbocharger spinning at high speed thus reducing lag. When the throttle is opened up again the ignition and fuel injection goes back to normal operation. Since many engine components are exposed to very high temperatures during ALS operation and also high pressure pulses, this kind of system is very hard on the engine and turbocharger. For the latter not only the high temperatures are a problem but also the uncontrolled turbo speeds which can quickly destroy the turbocharger. In most applications the ALS is automatically shut down when the coolant reaches a temperature of 110-115°C to prevent overheating.

An ALS system working with a bypass valve which feeds air directly to the exhaust system can be made more refined than the system described above. Some of the earliest systems of this type were used by Ferrari in F1. Another well-known application of this type of anti-lag system was in the WRC version of the 1994 Toyota Celica GT-Four (ST-205). Four brass tubes fed air from the turbocharger's Compressor Bypass Valve (CBV) to each of the exhaust manifold tracks, in order to provide the necessary air for the combustion of the fuel. The system was controlled by two pressure valves, operated by the ECU. Besides the racing version, the hardware of the anti-lag system was also installed in the 2500 "Group A homologation base WRC method car" street legal Celica GT-Fours. However, in these cars the system was disabled and inactive. The tubes and valves were only present for homologation reasons.

Today's WRC cars also use anti-lag systems which feed air directly to the exhaust system. The reason is that these systems are more refined, more effective with advanced computer control, and also quieter. Today this kind of system has reached such a refinement that it’s even possible to use the system in a road car. A recent example is the Prodrive P2 prototype. The system works by bypassing charge air directly to the exhaust manifold which acts as a combustor when fuel rich exhaust from the engine meets up with the fresh air from the bypass. This will provide a continuous combustion limited to the exhaust manifold which significantly reduces the heat and pressure loads on the engine and turbocharger. With the latest anti-lag systems the bypass valve can not only be opened or closed but it can actually control the flow of air to the exhaust manifold very accurately. The turbocharger is fitted with a turbo speed sensor and the engine management system has a map based on throttle position and car speed which is used to find a suitable turbocharger speed and boost pressure for every condition. When the engine alone can’t provide enough exhaust energy to reach the turbo speed/boost demanded by the management system, the bypass valve opens and exhaust manifold combustion begins. This not only reduces turbo lag, but it also allows boost to be produced at very low engine speeds where boost was previously limited by compressor surge or exhaust energy. With relatively high boost at low speeds, this makes the low end torque superior even to large naturally aspirated engines. The system is quite loud and is banned on some rallies because of the noise it produces."

DOWN SIDE:


"A quick rise of the turbocharger's temperature (which jumps from ~800°C to the 1100°C+ region) whenever the system is activated

A huge stress on the exhaust manifold and pipes (mounted on a street car a bang-bang system would destroy the exhaust system within 50-100 km)

The turbo produces significant boost even at engine idle speeds

The explosions which occur in the exhaust tubes generate important flames which can, sometimes, be seen at the end of the exhaust tube

 

^excellent write up

 

I understand what antilag is what I am saying is in the videos posted knlu two of them were true anyilag. Im asking if there is a way to setup twostep like the one video. He is just roving it to twostep and when he hits twostep it shoots flames. Im asking if in the evo ecu when u tube it if u can chang the two step to spark cut instead of fuel cut

 

1. log your two step.

2. at the rpm/load pull timing and add fuel

3. profit/hope you dont blow things up

 

Depends on what type of tuning software you have... Every two-step I've ever experienced is when the car is in neutral or the clutch is depressed is when two-step is activated (if you've had it set) and you can set the revlimit for that. Shooting fire out the *** is a bad tune imo, because, again, every two-step I've seen has had a proper tune doesn't run that rich.

 

Yeah that is what I mean if u look at aftermarket twosteps like the bee-r its not a bad tune its just the way it works. Its a spark cut instead of fuel cut so when u are twostepping and u hear it popping it is cutting fuel. When spark is cut it continues to dump fuel and when the spark turns back in u get a small flame. Its the same as any other twostep just cuts spark

 

05-07 evo's come with 2-step(it's supposed to be a safety mechanism) Anyway's start your car, let it warm up, put it in first, Engage the clutch( make sure you have a long road ahead of you.) With your clutch engaged build up your rpm's to 5500 you should hear a noise similar to the video slip the clutch and don't hit anything.
This is 2-Step it builds boost so you get off the line faster.
http://www.youtube.com/watch?v=tdyZtyLIUBk

 

if you install anti lag your turbo might not last long

 

im talking about this http://www.youtube.com/watch?v=n5eLH...layer_embedded
i know what a twostep is thank you but u can make your twostep more like this video than our stock evo two step. this is not real anti lag this is what im asking

 

Get your car tuned to run e-85 is the only way I've been told or seen to shoot flames out.

 

Im talking about an alternative Two step system like this here is the Bee R rev Limiter does everything that our Two Step does but u can change the frequency and everything on it. how high it revs how far of a drop it revs to. everything and it cuts spark which is why u see the flames
http://www.youtube.com/watch?v=bqmpW...eature=related

 

polish pounder yes.. you can do launch maps with tephra v7 mods and retard the timing and richen the afr and your 2step will shoot flames.

 

Thank u. Is this dangerous at all? Or bad for anything? Or does it just waste more gas?

 

just get this.

Flame-Thrower-Kits