VGT turbos

[numbertwo]

what do yall think about variable geometry turbos?
just planting seeds...

[ras463us]

Originally Posted by numbertwo

what do yall think about variable geometry turbos?
just planting seeds...

Several of us have already had this discussion. The limitations are discussed on page 2 of this thread.

KKK K26 or K27 Twin turbo setup on a 3.8L?

Basically, they are designed for the lower EGT of a diesel and won't hold up to the higher EGT of gas engines

[numbertwo]

thanks, but from what I understand that some porshes use them

[Bret Brinkmann]

Ask any of the guys at 3SX what I think about these things. Diesels be damned, I want my VGTs!!!

[spfan]

Originally Posted by numbertwo

thanks, but from what I understand that some porshes use them

i believe i read an article a year or so ago about them. they are supposedly the first that are able to withstand the temps of a gas engine, but use some fairly expensive material to do it. hence why they are in porsche's and not much else.

[rush6432]

Originally Posted by spfan

i believe i read an article a year or so ago about them. they are supposedly the first that are able to withstand the temps of a gas engine, but use some fairly expensive material to do it. hence why they are in porsche's and not much else.

wrong, chrysler/dodge were using these on production gasoline 2.2/2.5 four cylinder engins in the early EARLY 90s i believe (90 through 93-94 i believe) They were used on the dodge daytona and lebaron i believe.

[jeettao]

Yeah, you're thinking V->N<-T's, not VGT's. VGT is the proprietary name for the turbos used on Porsches. Yes, they're the same thing in theory, but VGT's are different enough to have their own set of patents (I believe a third party manufacturer designed them for Porsche)

They are, as far as I know, not available for sale outside of repairs for Porsches that had these turbos for their original equipment. I've only done some brief research into them (few hours worth), so you MIGHT be able to find them with more scouring, but at this point, your best (slim) bet is to find a trashed/totaled Porsche and buy them that way. In any case, it isn't going to be easy, or cheap. You're better off with DBB turbos and proven kits.

[inperfectdarkness]

vgt's aren't propritary. trucks have been using them for years. ever looked at a cummins turbodiesel?

i could be mistaken, but i'd bet that a whipple supercharger would still cost less than vgt's. and they'd probably still offer a better torque curve.

[jeettao]

Yeah you're right. The name itself isn't, but the design that allows them to work efficiently on a fuel injected combustion engine is. A diesel VGT is not the same as the ones that Porsche uses.

[3.5stealth]

it is also on some euro VW's but the existing configurations are not viable for our application.