Alternate Turbo Designs

[robjay]

Hi Guys,

I am inspired by a drive in a 135i with masses of torque down low and started to think, has anybody set up any alternate turbo designs.

Namely Variable vane turbos

and after some goggling I found this http://www.blaylock-turbo.com/switchbladeturbocharger.asp and looked impressive... any thoughts on this - would it work on petrol high rpm cars?

The Switchblade™ turbo uses patented technology to adjust the A/R ratio of the turbo to increase the speed of the turbine wheel under low flow conditions. The key to the technology is the Switchblade which is centered in the exhaust housing of the turbo. The Switchblade is controlled by pressure sensors and an electronic actuator so that under low boost conditions it rotates to close down a portion of the housing and increase the exhaust velocity over the turbine tips. This increased turbine speed translates into improved responsiveness and the result is a significant reduction of turbo lag. Once a significant boost has been generated, the Switchblade rotates back to a fully open position and the advantages of a larger housing are realized.

[The Mafia]

Sounds interesting actually

[ARTZ]

Hi Guys,

I am inspired by a drive in a 135i with masses of torque down low and started to think, has anybody set up any alternate turbo designs.

Namely Variable vane turbos

and after some goggling I found this http://www.blaylock-turbo.com/switchbladeturbocharger.asp and looked impressive... any thoughts on this - would it work on petrol high rpm cars?

The Switchblade™ turbo uses patented technology to adjust the A/R ratio of the turbo to increase the speed of the turbine wheel under low flow conditions. The key to the technology is the Switchblade which is centered in the exhaust housing of the turbo. The Switchblade is controlled by pressure sensors and an electronic actuator so that under low boost conditions it rotates to close down a portion of the housing and increase the exhaust velocity over the turbine tips. This increased turbine speed translates into improved responsiveness and the result is a significant reduction of turbo lag. Once a significant boost has been generated, the Switchblade rotates back to a fully open position and the advantages of a larger housing are realized.

yeah all the cool kids are doin it these days and no need to buy a BMW to get it

My Turbo diesel mazda tradies ute does something like it..called VGT..

"Mazda says the BT50 pioneered Variable Geometry Turbochargers (VGT) in utes. This technology controls nozzles mounted on the outside of each turbo blade, adjusting the speed and volume of exhaust gas flow to reduce turbo lag and provide strong low-end torque and quick throttle response."

http://en.wikipedia.org/wiki/Variable-geometry_turbocharger

lights up third gear no worries drop it to second while rolling and it will leave tracks ..

[Adriano]

BT50 pioneered Variable Geometry Turbochargers LOL

IVECO designed it, and have been running it for 10 years. I have a few of these turbos. Basically the vanes wont handle over 550deg so diesel only. The new porsche 911T runs 2 of these, but the vanes are probably made of unobtainium. Im looking into e85 ex temps to see if it will work.

[Adriano]

There is a guy in the UK who fitted 2 of these to a 1uz, made 22psi at 1800rpm and went on to make 450rwkw, now that is area under the curve.

[robjay]

yeah all the cool kids are doin it these days and no need to buy a BMW to get it

My Turbo diesel mazda tradies ute does something like it..called VGT..

"Mazda says the BT50 pioneered Variable Geometry Turbochargers (VGT) in utes. This technology controls nozzles mounted on the outside of each turbo blade, adjusting the speed and volume of exhaust gas flow to reduce turbo lag and provide strong low-end torque and quick throttle response."

http://en.wikipedia....ry_turbocharger

lights up third gear no worries drop it to second while rolling and it will leave tracks ..

Yes but its no sports car, why don't we see this in the after-market mod scene. Is there anyone in australia with a VGT set-up ? can a common tuning shop set up VGT? just surprised its not main stream.

[ARTZ]

BT50 pioneered Variable Geometry Turbochargers LOL

IVECO designed it, and have been running it for 10 years. I have a few of these turbos. Basically the vanes wont handle over 550deg so diesel only. The new porsche 911T runs 2 of these, but the vanes are probably made of unobtainium. Im looking into e85 ex temps to see if it will work.

No, read it again.."Mazda says the BT50 pioneered (VGT) in utes "...

probably not true either

[GTSBoy]

There's a whole thread on here recently about doing it with dual scroll exhaust housings and single scroll manifolds and a little dicky flappy valve that directs all the exhaust to one scroll down low and opens up both once the flow is high enough. And similar ideas have been batted around and tried for a long long time. The main reason that only Porsche and BMW et al have made much use of proper VNT gear on petrol engines is because it costs a lot of money to make them so the high exhaust temps don't kill them. It's piss easy on diesels by comparison.

[discopotato03]

That and the fact that most big diesels operate over a low narrow rev range . They also run on boost for long periods of time which you can hear out on the highways with trucks around . With petrol engines boost is there to give you a power boost for short periods of time because cars have much higher power to weight ratios than tow motors like trucks or diesel locomotives .

Porsche can afford to do these sorts of things with turbos and in fact most mechanical do dats on their cars . They are asking for a lot of performance in todays overregulated lean burn high exhaust temp engines but the rich prix keep buying them too .

I'd say these are very much an engine specific turbo and the struggling pleb car manufacturers just can't justify their cost .

A .

[abr33]

I was actually thinking about posting about this exact thing. My 4x4 has it, they make full boost at about 16-1800 revs. They have a funny sound about them too. Would be interesting if it ends up in the modifying scene

[BMYHOE]

i actually work for IVECO and have been looking & thinking quietly about these in the past years..

its amazing to see the internals of these turbos.. and the cost of one would be anywhere from $3500-$5500 depending on model turbo so there is much larger costs involved and as above exhaust temps maybe to high in our application..

in saying all this we just need someone like GARRETT / KANDO or someone with funds, to test these out for the aftermarket. / performance market.

i say its the technology of the future and am very excited