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Old 10-21-2011, 10:49 AM   #1
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Default Another Variable Geometry Turbo

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.
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Old 10-21-2011, 10:53 AM   #2
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Corky posted this last week:

Quote:
The VATN turbo is once again available in the aftermarket. The Aerodyne is now made in Kansas. I won't use them again, and haven't for ten years. No, not a topic for the second edition of Max Boost.
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Old 10-21-2011, 12:26 PM   #3
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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.
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Old 10-24-2011, 06:51 AM   #4
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It seemed to work in my TDI Golf.
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Old 10-24-2011, 08:44 AM   #5
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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.
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Old 10-27-2011, 01:51 PM   #6
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Or you can just put on a quick spool valve

But if you're fully spooled at 2800rpm why ******* bother with qsv or vatn
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Old 10-31-2011, 12:43 PM   #7
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Quote:
Originally Posted by Faeflora View Post
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?
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Old 10-31-2011, 12:52 PM   #8
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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
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Old 10-31-2011, 04:28 PM   #9
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Quote:
Originally Posted by Oscar View Post
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.
New Porsche Turbo has one, no?
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Old 10-31-2011, 04:49 PM   #10
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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.
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Old 11-02-2011, 06:10 PM   #11
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Less pressure making more pressure?


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Originally Posted by Spookyfish View Post
New Porsche Turbo has one, no?

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.
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Old 11-02-2011, 06:19 PM   #12
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Quote:
Originally Posted by Spookyfish View Post
New Porsche Turbo has one, no?
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.
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Old 11-03-2011, 10:49 AM   #13
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Guys, the holset Vgt can be modified to run on pneumatic operation and spools really quickly !!!
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