There are variable geometry turbo (VTG) of mechanical actions (not electronic)??? 
Thanks...
Thanks...
VTG variable geometry turbo...
- Thread starter lulo
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If you're asking if there are any vac operated or mechanical ones, then the answer is yes but would they suit a LC setup? No.
VGT's are designed to boost higher the higher up the rev range you get (which is specifically a petrol engine thing). Diesels don't rev that high mate.
VGT's are designed to boost higher the higher up the rev range you get (which is specifically a petrol engine thing). Diesels don't rev that high mate.
Variable turbos are used so that the turbo will spool at lower revs, yet not choke the engine at higher revs. Check out this Wiki.
GM, Dodge and Ford have all used variable turbos on their diesel pickups in North America since Jan '07 (or earlier), to meet the emission requirements that came into effect at that time.
HTH's
Jim
GM, Dodge and Ford have all used variable turbos on their diesel pickups in North America since Jan '07 (or earlier), to meet the emission requirements that came into effect at that time.
HTH's
Jim
most of new diesels that are coming out have VGTs. i know every truck in the isuzu range from 3L to 15L has one, and the pick ups as well. the new landcruiser 70 with the v8 diesel has one
most variable geometry turbos bite the big one!
Some of the early International trucks and a few of the early industrial Powerstrokes used an oil actuated VGT but they would get clogged with carbon and stick. The VGT's on the International's new Maxxforce 9 and 10 work very well. The electric actuator cycles every time the ignition turns on and off which keeps the vanes from sticking. The VGT works great and pushes the 53,000lb Maxxpro MRAP around very well 570 cu/in 375hp 1250ft/lb of torque@1200RPM. It also works in conjunction with the engine brake (separate) closing the vanes restricting the the exhaust like an exhaust brake. No lag boost right off idle= fun to drive. If they make a reliable aftermarket one my Landcruiser would get one!
