Anyone ever use a Variable Geometry Turbo?

[EH240SX97']

I was just wondering in anyone knows of a controler and turbo made for imports that uses this technology? If someone did there would be ZERO turbo lag for you big turbo guys.... Just Wondering

[npaulseth]

If I am not mistaken, those were used on Mopar stuff a while ago. From what I have read, they are not very durable, and don't put out a lot of boost.

Keep in mind I haven't read anything on them for about two years, so if my info is bad, forgive me.

[Red-KAT]

I know they use the VNT (same as VGT but for Diesel) on the 04 Golf TDI's

[Red-KAT]

I have been looking for someone who sells them... They should provide the same boost as any other turbo of the same kind... And you dont need a wastegate to control boost.

[TurboKA37]

how do they work?

[EH240SX97']

Well to explain it im going to have to use and analogy so here goes.....

Imagine your exhaust manifold (turbo maniflold) like a garden hose at low rpm there is what people like to call turbo lag. Now back to the garden hose if the hose is pinched at the end or your thumb is put over the end partially covering it you change the velocity of the exiting water without changing the amount of water that is supplied. There are vanes in a varible geometry turbo that allow it to "pinch" the exhaust flow at low RPM to increase the velocity of the exhaust gas thus spooling the turbo faster eliminating turbo lag. The only draw back is that the VGT needs a microcontroler that takes input from various sensors on the engine such as TPS MAF or MAP to tell the vanes were to be.

Newer Chevrolet and Ford trucks use this technology to give them almost ZERO turbo lag..but I havent seen this used in the aftermarket. Boost output is by no means affected by having this feature. Just cost lol.

[Red-KAT]

You are kinda wrong on how the VGT works...

This is how VGT works.

http://www.hako-lehrmittel.de/....html

http://www.osti.gov/energycita...92738

http://www.pipe-line.com/archi...n.htm
Modified by Red-KAT at 9:52 PM 3/5/2005

[ArticDragon192]

You guys talking about a VATN turbo? IIRC, the vanes get larger as rpms rise resutling in te lowest amount of backpressure and heat created from a turbo. So it acts as a small turbo in the low rpms but as rpms rise, the vanes in the turbo open up more making it act as a huge turbo.

[RMiller]

How many newer Ford and Chevy trucks were turbocharged? You talkiing about the syclone (or however they spell it).

[pitchlock]

I think they mean on the diesel trucks, There seems to be alot of Technology in those things

[EH240SX97']

You are kinda wrong on how the VGT works...

This is how VGT works.

http://www.hako-lehrmittel.de/....html

http://www.osti.gov/energycita...92738

http://www.pipe-line.com/archi...n.htm

Modified by Red-KAT at 9:52 PM 3/5/2005

Not to be a wiener or anything but... your second link you posted is EXACTLY what I said without getting too technical. I dont try to make it so technical that people cant understand what I am talking about. Homey don't play that.

[Red-KAT]

yeah I'm a gomer...

I was just looking at those and I swore it said something totally different.

[TheOne]

ok i just saw how it works on xtreme 4x4 on spike tv, doesn't sound like a bad idea:).....maybe i should try that.

yeah they put it on the newer ford and chevy diesel trucks.(not on dodge trucks so dont look on those:))

here's a site http://www.bankspower.com/

here's how it works http://www.everytime.cummins.c...dband
Modified by TheOne™ at 7:02 PM 3/6/2005

[koukiKA240]

LOL YES, i just saw that too. When they said VGT i perked up and was like hey i just head about this in NICO last night. But the way they described it with the pictures and everything really explains it well.~Sam

[ArticDragon192]

I believe Maximum Boost by Corky Bell also has a section explainning them

[Jookmasta]

ya i just saw it on spike tv too. i wish they had that stuff for the 240

[EH240SX97']

Apparently we all watch the same shows lol I just was wondering if anyone has ever used one.. THanks for all the replies guys.

[virus77]

LOL YES, i just saw that too. When they said VGT i perked up and was like hey i just head about this in NICO last night. But the way they described it with the pictures and everything really explains it well.~Sam

+1

[H.D.HUMPERDINK]

I believe Maximum Boost by Corky Bell also has a section explainning them

Corky Bell wrote about it because if was his design if I remember correctly. But, the ones that were talked about in the book were failing after 3500miles.

I was reading about them when I got the book, but I could only find info for cars that had small motors. But, I am sure the new technology has improved on the design.

[pr240sx]

No variable nothing on GM turbo cars and pick ups.At least on turbo buicks (any year), Trans-Am (both 80 and 89) and Syclone/Typhoons.Even they use Mitsubishi turbos!

[H.D.HUMPERDINK]

I read last night that Holset has a turbo using this technology coming out. It should be in chevy trucks by '07.

[nizmo240sx_22]

Personally I think the variable turbo ( or whatever you want to call it ) is to unreliable. Corky Bell did say that they stopped using them cause they kept busting ^^^like said above. I give the industry another 5 years or so to improve on the reliability enough for a daily driver. The new boom of the turbocharged street cars should definately fuel the technology.

[H.D.HUMPERDINK]

I got this from another website, the people on the forum know him a someone who works for banks:"Yes, this is a Banks Turbo. The duct work is designed to work with the Banks intercooler, which also incorporates a High-Ram intake (you’ll see that on the show as well). For production purposes we are going with the versatility of the variable geometry over a twin or a compound turbo setup. We are achieving over 500 HP with the VG with excellent drivability. The only twin setup that we are involved with is a marine version that is making about 750 HP.

After the show airs, our sales reps will be equipped to handle any questions regarding the variable geometry turbo. The unit that will be installed on the show is a prototype, production units should be available within about 6 months."

[nizmo240sx_22]

Good deal... What kind of warranty does banks usually provide? It'd be amazing if they had a high quality model. Probably will have some bugs to work out though.