Anti Lag System

[Deadmau69]

Will there be a anti-lag system for the turbos in the future ?

[WizzyThaMan]

As far as I know, the devs said that turbo's need a total recalculation. after that, they will look into superchargers and such first perhaps, before adding more in-depth stuff to turbo's. They are already hard to understand for the majority, so extra functions here, I wouldn't be too keen on.

[RobtheFiend]

Anti-Lag systems are only used in rally, rally cross and racing. Never on factory street vehicles. Also using such systems reduce the lifespan of the turbo significantly.

[gt1cooper]

There are some cars with electrically driven superchargers before the turbo which reduce lag; they are public cars. Though there wouldn't be much practical aspect for putting this in the game.

[WizzyThaMan]

Exactly, it would be cool if we were making an engine simulator game, but the effort it takes compared to what gameplay benefit it is going to offer, is close to zero.

[SamSheepDoq]

VGT is an anti lag system, isn't it? That's common on a lot of turbocharged cars today because it's very simple and cheap.

[RobtheFiend]

VGT is a way for the turbo to work with less exhaust than normally, spinning it up earlier in the rev range, aiming them more directly at the turbine.
That doesn't make it an anti-lag system, which is used to keep the turbo at high revs when changing gears, using deliberate misfirings to make extra exhausts. It would overheat a standard turbo very fast.

Nothing in common with the two systems.

[Daffyflyer]

VGT is like being able to change your A/R ratio on the fly basically. But as far as I know it's been difficult to engineer for petrol motors until recently?

[RobtheFiend]

Petrol exhausts are most of the time much hotter than diesel exhausts.
Unless you use a dual stage twinturbo setup with 5-6 bar boost limit on a diesel, then you will get exhausts even on a diesel that can melt the turbine and any extra parts.

[SamSheepDoq]

I've never known them to be difficult at all. VGT is broken down into the same basic parts, plus an actuator, plus the vanes to adjust the A:R. Daffyflyer, you can check out this video by Engineering Explained to see the current VGT system (it also may help development of Automation.?). Pretty simple turbocharger. https://www.youtube.com/watch?v=hdjsNPe ... 9&index=12

RobtheFiend, I imagine you're talking about tuned diesels? We don't exceed about 2 bar on most stock diesels in the US. Actually, I can't think of any diesel that runs 5-6 bar stock.

[Daffyflyer]

Hmmm, I was fairly convinced a lot of manufacturers hadn't done VGT on petrol motors due to exhaust gas temp issues until quite recently, not sure where I got that idea though

[SamSheepDoq]

I'm not sure what caused that idea either. You would think that standard turbochargers could be modified for VGT and installed, but maybe it's not that simple.

[Spool]

997 911 Turbos use VTG, specially made by Borg Warner. Funnily enough VTG is Borg Warners trademark name for VNT/VGT/Whatever other manufacturers have variable turbos. They've been used on petrol cars for years with limited commercial success (Chrysler, Dodge, Peugot) . They all do the same thing except have differing mechanical means (different number of moving parts or different ways of moving). They can have differing means of actuation, electronically or via pressure.

Ultimately while the aftermarket has had some unsubstantiated success with them, the general story is that petrol motors output too much heat for them to be production reliable and that the Porsche 911 is the only model to use turbos made of special alloys to combat heat (and appears to be the only commercial success).

Robthefiend is correct - VGT is not antilag. And modified diesels can be utterly awesome both in tractor pulls and drag racing (1500+HP and 150psi boost from a 6.7L!!!) but unfortunately they come from the factory with like 300hp. Doesn't the crank in those competition diesels cost like US$10k?

Anti lag is pretty cool in its little square but would be a huge detriment on a production motor - for the previously mentioned turbo changeouts as well as a whole tonne of noise on the road.

[SamSheepDoq]

Most of our pickup truck diesels range from the high $7,000 to low $10,000 range. The lowest being the Chevrolet Silverado's Duramax diesel and Allison transmission, and the most expensive Ram/Cummins' 6.7L diesel with the recent (2013) Aisin transmission. There are 1900+ hp diesels in America if you search for them on YouTube. The main reason they come from the factory with 300 hp (440 hp for Power Stroke) is because they are sub 30 psi boosted engines. It's pretty amazing that diesels can take 150 psi though!

I've heard of Variable Nozzle Turbochargers, but never learned about them or really cared for them.

[vmo]

http://blogs.km77.com/celedonioycogollu ... futuro-ii/
More info in the video (the video there are in Spanish).