This is called cylic idle! All rally cars idling run on 3 cylinders in order to keep the egt low and to have a anti-lag system! This is an awesome tuned car wish mine was like that!
My friend is going to love you, for this video ;D Awesome footage, mate - lovely car and sound. I really like those "real" Subarus - blue color with the golden rims :)
Definatley. A friend of mine installed it on his RB25DET skyline with a performance exhaust + cat. After about 4 decent backfires the cat just blew itself out the end. His exhaust manifold required replacement 4 days later. Luckily they're very common in NZ. He learned the hard way as to why most rally cars are straight piped.
Yes. The fuel it uses varies some. But it puts gas into the exhaust before the tubro then ignites it to keep air moving through the turbo and there for creating boost.
the antilag works by arranging for fuel and air to be in the exhaust duct after the engine, and before the turbocharger. This ignites in the hot ducting and the combustion process that occurs there keeps the turbocharger spinning when the engine is not delivering enough exhaust gas...in other word it minimize turbo lag
@FordV8Supercar normally no but with a anti lag system backfires are good because the timing is so far advanced that ignition happens when the exhaust valve is starting to open. That way the explosion takes place in the exhaust pipe as well as the cylinder, which causes the expanding gases to force the turbo to spool without having to step on the gas hard. That's the just of it anyways.
@AndyRoddick969 in short, it's an explosion in the exhaust that keeps the turbo spinning, leading to reduced turbo lag and more power readily available.
So by advancing the timing ATDC, the spark is late, and the additional fuel isn't burnt, it leaves the cylinder and explodes in the exhaust manifold right before the turbo, the extra gas produced from that combustion helps spin the exhaust side turbine, and now you've got extra charge air pressure at idle! I guess heel and toe is sort of the same thing, you're just using your clutch and actually spinning up the engine to achieve the same thing, but this plus H&T would give you the most power.
you get a rev limitter with anti lag or get it programmed into to the ecu map. its puts more fuel in and it dosent get burnt so gose pop in the manifold and makes the exploded air shoot through the turbo
@CDNchewy It's used to keep the turbocharger spooled up, usually seen on rally cars. There are various methods of doing so. The above video appears to be back-firing, which is just unburned fuel combusting in the exhaust, very different from anti-lag
That's not a WRC Wing its a factory STI wing with "Perrin Stiffies" installed in it. What they do is stiffen the wing on bumpy roads and higher speeds for better down force.
i wouldnt consider them the same thing but i would put them both anti "lag" 2-step/launch control: >can keep revs up so car can launch with more power on tap >can keep revs up and spool turbos (build boost) for boost applications anti-lag >flows gas through the exhausts of the turbo to keep it spinning when not on throttle/pedal (thus the loud backfires when the car lets off from the burning gas) yes a car will backfire from being rich but most rally/race cars may run slightly.
Just so some of you know because there are many silly comments about the exhaust. This exhaust as well as most racing exhausts isn't about being 10 inches round and shiny, its about getting torque/Power. Look at the WRC equivalent, pretty much the same as this, not huge but fucking effective! Nothing ricer about a racer...
yeah im sure rally rules but the throttle cable will always be more responsive and give better feedback to the driver than electronic throttle control.
You can get 500 awhp with a stock "location" turbo. G35r is not the only option for big power with these cars. Blouch turbos with supporting mods and e85 can nail 450awhp-tq. 500 is not too far off, ported and polish intake system an heads could assist in a achieving that power as well
So a turbo is a turbine that spins from exhaust gas, and powers another turbine which sucks air into the engine. At high RPMs you have lots of exhaust gas, and the turbo sucks air in, but at low RPMs, you have less exhaust, and you don't get as much air (turbo lag). To counter this, you inject a little bit of fuel into the exhaust manifold, and it ignites off the temperature of the pipe, and it essentially explodes in the pipes, keeping pressure high and the turbo spinning, even at low RPMs.
Turbo's have 2 turbines, both connected to a spinning shaft, the shaft is spun by the exhaust side turbine and the exhaust gasses, as a result, the intake(charge air) side turbine creates a huge vacuum and pressurizes the charge air, pushing it into the engine, force feeding it more air, that means you can inject more fuel and make more power. Problem is, the turbo isn't effective at low RPMs, so anti-lag advances timing and adds fuel, the exhaust system explosions spin up the turbo. faster.
driving that thing around town would be like being in an elevator with extremely loud gas with everyone lookin at you thinking you can do something about it but in reality you cant lol
I love the sound of Subaru exhaust. (my old Subaru was nicely tuned. But this really sounds like a lactose intolerant elephant on rapid laxatives after drinking a ton of milk...
@NM2255 meno male! finalmente ho chiarito...ho cercato dappertutto questa risposta....non ero certo che si pagassero solo quelli fiscali, anche perchè su tutti gli articoli non specificavano.
Actually, yes, yes it is. It has two infact. The only car of mine without a turbo is my 2011 SL63. and anti-lag / 2 step is the EXACT same thing. unless you hold it at a constant RPM, and let the anti lag build boost (remember, anti lag gets rid of turbo lag) Having your car backfire when you just rev it up to 2k means it has an excessively rich idle, likely from huge injectors with a lack of dead time or not enough granularity w/ fuel tables on the ECU.
As for the turbo its no different. It just has typical gasses passing through it. But in the parts of the engine where these explosions happen at that is a different story. It is very very hard on those parts. This is also why its so expensive because you have to buy much tougher parts to handle the explosions from the fuel that happen where normally they do not haha.
i'm just guess it has something to do with getting the desired back-pressure, although i would think it wouldn't be sufficient to move all that air under full boost
jmar I think the car is tuned good. I have an sti 2011 with a 430 hp of both regular tuning, but the tune we hear on this video is an option for an offroad racing tune. So never say something is bad untill you tasted it. ;)))
It is not cheap to do. It requires very strong parts to handle the explosions and is VERY VERY hard overall on the engine. But it works buy in short terms fuel injectors into the up pipe(if i am not mistaken) Which then you ignite that fuel to cause air flow through your turbo at low rpms. You can however do a system where you flip a switch to turn anti lag on and off. Seen in this video /watch?v=HquMJQZ7QRM But i doubt that is very easy to do as well. Just add youtube. com to the stuff above.
