Are you kidding? Obviously you have never done a clutch job on one of these beasts

 

Shelby used VNT (variable nozzle technology) turbos in their 1989/1990 Chrysler Sundance/Shadow-based CSX. 2.2 L engines that produced 174 hp/225 ft-lb, no turbo lag and did not require a wastegate. As one enthusiast's webpage puts it "These were not paticularly reliable engines."

As others have noted, variable vane turbines are standard equipment on many diesels. My brother's semi, for instance, uses one. It only produces 450 hp, but it boosts at 1 bar from idle and has a dead-flat 1650 ft-lbs of torque from 1100 to 1600 rpm (from which point on the computer dials back the torque.) The reason they work on diesels and not gasoline engines is that diesel engines have exhaust temperatures that are about 500 degrees F cooler than gasoline engines. I don't think anyone has made variable vanes that will work reliably at our high exhaust temperatures.

 

"Just like the turbos on the golf TDI's
Neat-o, I had never thought of it until I had one on my 05 golf TDI, can you say nearly-instant spool-up?
It's about time they really try to apply this to gas engines. They should go talk with whoever makes VW's turbos, because theirs have been operating very well for years now. The only problem they suffer from is soot build-up on the vanes, causing them not to move. I've never heard of the vanes grenading or anything."

Porsche OWNS the managing share of VW now.

 

dont even get me started.

 

Waterguy, you should see the EGTs of some chipped TDI's. They rival even the highest EGT's you see on gas engines. Then again, on some semi's you should see the same temps.

I know that porsche owns the managing share of VW, all I was saying, is they should get the company who builds the turbos for the TDI's to do some research on adapating them to work with gas engines (Really shouldn't take much). I wasn't saying they should work with VW.

 

My point is that they very much are, and did work with VW on this. Why spend the capital to research additionally when you already have the resources in house? This was already posted somewhere else on RL. I can't remember where.