Garretts newish VNT Turbo Chargers- No more Lag?

[QNLOOK]

These new VNT turbochargers are starting to emerge into the market and was wondering if anyone, possibly GenTT manufacturers, are looking to use them in the aftermarket/ performance world? Looks like the answer to no lag with plenty of top end.
From what Ive been able to find their size may be limited at the moment, but I guess you could chuck on 4 small suckers to make up for it. Anyone who may have tried them or no of results from one, would be keen to hear.

http://www.honeywell.com/sites/ts/tt/turbofactsbenifits_VNTworks.htm

[DeViLisanAnGeL]

Interesting concept that one :)

[Uncle Tone]

I wouldn't mind seeing these used in the aftermarket industry. Could upset the blower guys though! :lol:

[Big123]

Vane turbos are not a totaly new thing .Or reliable at that .

I've changed the Garrett Vane turbo on a Nissan patrol that failed after only 40'000 ks .

$1500 for a new Garrett Vane turbo , But we used the upgrade system from Rotomaster .

No longer is it water cooled , Only oil cooled .Apparenty the water cooling was what was making them fail .

Now all new Patrols are only oil cooled now from factory I think ? Thats what I was told anyway .

[markone2]

I wouldn't mind seeing these used in the aftermarket industry. Could upset the blower guys though! :lol:

keep eyes peeled UT ....*stats* on FI VE Conversions are coming .......an I've probably said way way
toooooo much already :.......I'm outta here :hide:

[QNLOOK]

Vane turbos are not a totaly new thing .Or reliable at that .

I've changed the Garrett Vane turbo on a Nissan patrol that failed after only 40'000 ks .

$1500 for a new Garrett Vane turbo , But we used the upgrade system from Rotomaster .

No longer is it water cooled , Only oil cooled .Apparenty the water cooling was what was making them fail .

Now all new Patrols are only oil cooled now from factory I think ? Thats what I was told anyway .

Fair enough you have had 1 or some fail before, thats pretty standard with turbos full stop, but considering how many of them would be out there id imagine there would be many which have lasted, and if companies such as porsche are using them im sure they cant be to bad in that department. They will only get better with time I guess. Does the water cooling only run in the CHRA or also into the rear housing with these ones?

[SchrgdVSV6]

Vane turbos are not a totaly new thing .Or reliable at that .I've changed the Garrett Vane turbo on a Nissan patrol that failed after only 40'000 ks .
Im dont know much about the Nissan setup, but VNT works well on diesels. However a petrol engine produces much higher EGTs and has a much wider rev band (more vane movement) which has been identified as a possible cause to their early failure.
Im not sure how Porsche make them reliable on their turbo model... or is it a changeover on the 10,000km service? ;)

[VZKOOP]

I wouldn't mind seeing these used in the aftermarket industry. Could upset the blower guys though! :lol:

You already chasing more power UT? Could the GTS handle it/you..... :1peek:

[MattJ]

Porsche have done A-L-O-T of testing to make these things reliable, as stated they are reliable enough in diesel applications (and are widely used) but the petrol jobbies will soon test them out. They were used in the after market a few years ago in the US but shelved because of reliabilty issues. There are other ways to minimise 'boost responce' delay (the correct term when lag is typically discussed) that will get you close to a PD blower but that is for another time.

[Martin_D]

Nissan were fitting VGT Garrett turbos to passenger car engines like the VG20 back in 1987......they arent really much chop, drive a 996TT Porsche (non-VGT) and a 997TT Porsche (VGT) and the earlier car feels more lively. Go figure! :eek:

On the other hand VGT turbochargers are great for tuning. Adjusting the VGT position table in my Mercedes C220CDi has got some excellent gains through the top end of the Benz power curve :cool:

[HSVQUE]

Didnt the older selica ralley cars use something like this? and no one could workout why there were so quick? then they got busted and the technology was banned in ralley..(I could be wrong)..

[SchrgdVSV6]

Didnt the older selica ralley cars use something like this? and no one could workout why there were so quick? then they got busted and the technology was banned in ralley..(I could be wrong)..
Nah they didnt use VNT. Each rally car is supposed to have a restrictor on the compressor inlet (cold side). Its a certain diameter and only allows a certain amount of power to be made. The ones Toyota had, expanded during the race (can flow more air) and apparently contracted at the end.... I dont know how they did it and how they were found out.
Cheeky buggers! :rofl:

[The_Senator]

Toyota where found out, so i am told, by the Scrutineer *dropping* part of the turbo - and the aforementioned part popping out..

This could be total *Shite* but i have heard the same story many a time - and from people in and around the rally game at the time..

Apparantly the room went "quite" likened to the "Oh SH!T" moment..

They where *VERY* unlucky and if not for the simple 'slip' would have gone unnoticed..

It's only illegal if you get caught - is not it?