No lag electronically spooled turbo

[brute]

Maybe the fins move via oil pressure...?

 

[yukondoit]

VNT turbo can run right off of vacuum, i have two, one is a gt15 and the other is a aerocharger. when the vanes are angled they will spool the turbo after they straighten it doesnt.
They work but change the back pressure therefore change the exhaust gas velocity and kenetic energy before it hits the turbine.

 

[ITSME4G63]

VNT turbo can run right off of vacuum, i have two, one is a gt15 and the other is a aerocharger. when the vanes are angled they will spool the turbo after they straighten it doesnt.
They work but change the back pressure therefore change the exhaust gas velocity and kenetic energy before it hits the turbine.

yes, turbos like this exist, my friends dad has a chevy 3500hd dually, which got a huge assturbo which has that vane technology, but it is mechanical, im talking about electronically controlled like the ones the thread starter is talking about.

 

[perrynajarian]

Has anyone ever heard of a vgt turbo? My brother has a f-250 deisel that modded pretty heavily. And if his vgt is unlpug the turbo spools normally, with the lag and no control over the boost level because the vgt acts as the boost controller/ wastegate aswell. But with it plugged in he can make 1-2 psi at idle and can spool 38 psi instantly as soon as he steps on the gas..... Might wanna look at this i dont totally understand the vgt stuff but i know what happend when it was plugged in and not....

vgt stands for variable geometry turbo, most modern large diesel engines use this type of turbo, the cummins isx 15 litre, the detroit diesel 15 litre, and mercedes heavy duty diesel engines, most of them work by moving a sleve closer to the exhaust side turbine wheel, the sleeve is controlled by a servo motor, at idle or low speeds it varies the exhaust geometry to make the turbo spin very fast, i work on trucks and ive seen the detroit diesel 15 litre making 10 pounds at idle, they sound like a jet, this
raises combustion temperature at idle which lowers hydrocarbons, and gives the engine instant response, very bitchin, garret and holset are 2 of the brands ive seen....