Garrett SST VNT Turbo

[copbait73]

OK, who wants to be the first TURBO in the world with one of these?

[jpnovak]

Very Cool Marty.

I would almost shift my engine build for the targa to incorporate one of those. All it takes is a compression ratio change...

How is the VNT activated? electronic, pressure, mechanical? Just curious.

[MikeD930]

Wow...that looks complicated and heavy! No thanks except for maybe a diesel turbo'd truck!

[Flieger]

Why not just use an Aerocharger kit?

[mark houghton]

Originally Posted by Flieger

Why not just use an Aerocharger kit?

If (IF) it will bolt right up as a direct replacement for a K27 then perhaps it would be considerably less $$$$ than the entire aerocharger kit. Who knows?

[copbait73]

The reason you may consider the extra work is this one unit has the capability if doing what the sequential turbos system did for the 959. It is more than twin parallel turbos.
The Aerocharger was novel back in the late 70s. Time and technology moves on and this is much more than an Aerocharger.
If you are looking for cutting edge air systems you have to ignore gas applications and look at what is happening on diesels.

[copbait73]

Another teaser

[totle]

Twin-turbo setup in one unit :-) Nice :-)

Who will be the first to try this in a 930 ?


VNT™ DualBoost™ – which recently won the prestigious PACE auto award – has been launched in the US on the 2011 model year Ford Powerstroke 6.7L V8 diesel engine used in the F-Series Super Duty.

Although this is a design bristling with innovations, what makes this turbo really stand-out is its compressor technology, which is helping to deliver near two-stage performance in a single unit.

The benefits of having two compressor wheels feeding an engine are well known and two stage turbo installations are becoming more and more commonplace. However, packaging (the space available to fit them) is often restricted, so what Honeywell engineers have succeeded in doing with DualBoost is to combine the airflow from two compressor wheels within a single turbo!

[copbait73]

Jamie (Darn........working on a Spanish keyboard)
This is for you.
Basic framesize is T3/4. Rotor is probably GT35 as are basic aerodynamics. Rotor is on ceramic ball bearings. The lower casting is pedestal mount and comes off.
The clunky canaster and wastegate was not on the original configuration but showed up on production. Probably a last minute patch to correct turbine flow control at some extreme operating condition. Could be eliminated.
Turbine has 180 degree dual entry round Vband connections.
The vanes are controlled by engine oil pressure applied to a rack and pinion via a solenoid control valve. The electronics are typical to any solenoid control valve but needs controller. The compressor needs a sequencing valve and controller also.
These turbos have been in the field since summer of 2010. Obviously still on warranty but if you shake the bushes you may find a lightly used one. Know any Ford mechanics?

[willtel]

Twin turbos are yesterday's news.

The new 991 Turbo is rumored to be using a triple turbo set up.

[copbait73]

Now that will be interesting an unique unless they are simply 3 fed by twin cylinders each.

[Spenny_b]

Aren't BMW also now about to start using 3 x turbos?....not in a 2xCyl/turbo configuration, but more of a sequential setup.

[willtel]

Originally Posted by Spenny_b

Aren't BMW also now about to start using 3 x turbos?....not in a 2xCyl/turbo configuration, but more of a sequential setup.

Yep. BMW was first but I do think the new 991 will have three. Supposedly Porsche showed their hand when the filed for a patent in Germany for their system. If you google "991 tri turbo" you will find the articles.

From what I have read there will be a small turbo feeding into two lager turbos and it will make 525hp. Who knows what the Turbo S will make or if they will build another GT2RS.

Who wants to be the first to cram six of them on a flat-6?

[copbait73]

Originally Posted by Spenny_b

Aren't BMW also now about to start using 3 x turbos?....not in a 2xCyl/turbo configuration, but more of a sequential setup.

Yes, thanks for the link.

BMW have a series turbo system which is pretty typical of modern diesels since they desire high boost pressures (25-30psi) but the twin VNTs are unique. Not that twin VNTs have not been considered, other engine manufacturers would never step up to that level of warranty risk and cost.

The stories of Porsche's use of three is intriguing. Being gas vs diesel Porsche is not after high manifold pressure but flow range. It will be interesting to see how they drive one small turbo then sequence parallel twins. If in fact they are really using a configuration like described in the spy news. You can totally close vanes therefore making them both variable and on-off valves. That may be how they are working their magic.

If I didn't already have a nice set of VNTs for my 3.0L, three small, lightweight and inexpensive turbos on twin header pipes each would have a very distinctive sound.