variable vane turbos
 

Why is it that no one has used variable vane turbos for our cars? I'd like t start a discussion on the pros and cons. I have a gt3782v that is currently a giant paperweight. I'm thinking that it would spool relatively early and could avoid excessive egt's with the size of the exhaust housing. What are your thoughts on something like this.:thanks:

Use the search button. I already started a thread like this.

Search doesn't work well on mobile. Would you be kind enough to provide a link?

when people talk about variable vanes i think about turbine engines. the variable vanes in the t701d, uh-60 blackhawk engines, opens up to increase air and power. it is kept close until a certain power percentage is reach (NG). variable vanes in turbine engines change the angle on how the air is sent to the compressor, it uses the anti-ice start bleed valve to control the amount of air going into the compressor and diffuser. an actual design of such a turbo would make it pretty efficient but it would make the turbo pretty big.

It doesn't increase the physical size by very much. I would post a pic, but I'd have to resize it.

To compress that kind of adjustabikity into a turbo of reasonable size, it gets incredibly complicated very fast. And its a direct coorilation to the price as well. If you already have one like the OP said, then id contact JDL as in the thread i posted they said they were willing to help with a custom setup if i ever wanted to make one.

Expensive and overcomplicated when a twin scroll with a quick spool valve would work nearly as good :) Hell, even Honda knew that...

I never bothered to figure out what a quick spool valve is, care to enlighten me?

It's something you really see far more often on truck turbodiesels. I believe Ram trucks with the Cummins Turbodiesel have them as an option.

I'm not sure I can link it as it's not a vendor on these forums. Commonly used on Supras and they come right up in google...

quick spool valves close off one "scroll" on a twin scroll turbo until a certain boost pressure is reached. This allows you have a very big turbo with a relatively quick onset of boost.