I am always hesitant to post questions here but I figured what the heck. Is anyone familiar with the Switchblade variable geometry turbo? They currently have units for large displacements.

I've been wanting an Aerocharger turbo because of Corky's book but this thing looks like a simpler version. Perhaps VGT's are ready for DIY aftermarket after all. When Audi won the 2010 24h Le Mans with a VGT I think it made people stop and rethink some of the smack they said about them.

Switchblade VGT

Aerocharger VGT

Holset VGT

*Thanks MT.Net for taking my post, I'll take my response offline" I listen to too much talk radio.

 

Corky posted this last week:

 

So now that Corky doesn't like Aerochargers, does it mean that they all not worth considering. Those Aerochargers have a ton of moving parts. Perhaps any one of the simpler methods will prove a better choice.

Specifically the idea behind the switchblade seems so simple that i wonder if anyone else is familar.

 

It seemed to work in my TDI Golf.

 

Exactly, TDI. Slower moving gas and way lower EGTs. I had a little chat at school with one of the mitsu turbu engineers displaying a new VNT turbo. Apparently they are going to build them for gasoline engines now. There was a cut-away model with fancy inconel parts supposed to hold up to the heat produced.

 

Or you can just put on a quick spool valve

But if you're fully spooled at 2800rpm why ******* bother with qsv or vatn

 

Because you can open up the vanes and get better flow (and power) at high RPM.

Variable geometry turbos are fantastic. Reliability due to the extreme temperatures in the turbine is really the only downfall. If that is solved, more power to them.

I wonder how the variable vane turbos are holding up in the new Porsches?

 

even if they are those are expensive *** turbos not many of us can afford any time soon.

and to make them affordable would most likely compromise reliability.

catch22

 

New Porsche Turbo has one, no?

 

I don't know. I kind of stopped listening after I heard bmw 3xxd talk and took some free turbine wheels they had laying around.

 

Less pressure making more pressure?



The Porsche has the variable vane geometry turbo commonly used in diesel engine turbos. Problem the vanes melt and get destroyed quickly on gasoline engines due to the much higher heat. Porsche had to use aircraft metals to make it work on their gasoline motor. I'm sure thats rather expensive price tag.

 

Yes, the 997 Turbo has a variable geometry tubrocharger. I remember thinking how bitchen' that (turbo) must be when I read about it in Car and Driver.

However, if Corky Bell, the man who literally wrote the book on turbocharging, does not like this specific turbo for some reason, I would personally avoid it. Then again I'm very much a novice, so yeah.

 

Guys, the holset Vgt can be modified to run on pneumatic operation and spools really quickly !!!