Author Topic: VNT info (Read 8657 times)

jimfoo · « **on:** September 12, 2008, 08:44:53 am »

I just got my rebuilt VNT back from Street Toys, and while talking to them, I asked about the max safe temperature. He said that with the new alloys, he will take his up to 1600*F! I think I will still limit mine to 1300 though as the engine starts getting hot at or above that, but I just thought I'd let everyone know. BTW, they had good service and a fast turnaround. $600 with a new shaft, boring out the compressor housing to use the same wheel as my .43 housing which they couldn't get a back plate for, basically making it into a 1749 VB, and a new actuator, which I didn't need, so I will send it back and get my money back on it. Plus they had to machine where the shaft oil seal rides and put in a steel insert. I will give them 2 thumbs up!

Now if it will only stop raining so that I can put it on!
Oh, and they also put in new vanes as well.

blkboostedtruck · « **Reply #1 on:** September 12, 2008, 05:12:11 pm »

sweet jimfoo!
i sure liked that right hand drive rover you had for sale! too bad i bought a 79 jeep a couple months back!
Duane

jtanguay · « **Reply #2 on:** September 14, 2008, 08:08:59 pm »

more updates!!! did you get the turbo on yet???

Smokey Eddy · « **Reply #3 on:** September 17, 2008, 01:44:06 pm »

What exactly is VNT???
Variable Nozzle Turbine? or something. How do they work...
is it like a turbo and the fins move or something. Sounds very complicated ... i want one! :twisted: :twisted:

i just looked at new ones online
jesus... $1,000 and up???

zukgod1 · « **Reply #4 on:** September 17, 2008, 02:51:43 pm »

There are controll vanes in the exhaust housing that can direct the exhaust through or around the exhaust turbine thus controlling the speed / boost of the turbo.

jtanguay · « **Reply #5 on:** September 17, 2008, 08:26:35 pm »

http://paultan.org/archives/2006/08/16/how-does-variable-turbine-geometry-work/

that should make it easy to understand

jimfoo · « **Reply #6 on:** March 03, 2009, 02:14:28 pm »

:evil: After having my car down for a couple months, turbo problems, I finally pulled it. Seems to me, without taking it apart, that the nut may have backed off the shaft as I have both a good bit of in and out play 1/8"-1/4", but also have almost 1/2" side to side. I am hoping Street Toys does something about it as it seems it is their fault to me.

subsonic · « **Reply #7 on:** March 03, 2009, 07:43:19 pm »

Wow, that straight up sucks. I'de suggest you send them a copy of your first post along with a high quality video showing all that damn shaft play. Pictures worth a least 5 phone calls. Video just seals the deal and gets you that pre-paid return box for shipping.

fatmobile · « **Reply #8 on:** March 03, 2009, 11:29:58 pm »

Quote

What exactly is VNT???

I think the main benefit of a VNT turbo is the exhaust gasses hit the turbine from all sides. They aren't just fed in from one direction, hitting a portion of the wheel.

truckinwagen · « **Reply #9 on:** March 04, 2009, 09:41:00 am »

the exhaust wheel of a turbo is pushed from all sides, that is why the housing diminishes in size as it goes around, forcing gasses into the turbine as they go around the housing.

a regular turbo will be loaded on one side a little more than the rest, but by no means are the exhaust gasses just blown into the turbine in one spot.

jimfoo · « **Reply #10 on:** March 07, 2009, 10:23:02 am »

Finally got a hold of them. He said to take some pics, for both of us, then send it in. We'll see what happens

jimfoo · « **Reply #11 on:** March 07, 2009, 10:54:27 am »

pics

jimfoo · « **Reply #12 on:** March 16, 2009, 03:48:35 pm »

Update, a lot is trashed inside, cartridge, shaft, comp housing and back plate, comp wheel of course. He can't tell what happened or why. He is rebuilding it for his price on parts, no labor, which I guess is fair. Just wish I knew what happened...
With the price of diesel close to gas, I really want it to be on the road again, but I have to wait for the next paycheck as hours are down at work. :cry:

subsonic · « **Reply #13 on:** March 16, 2009, 06:22:36 pm »

Can ya slap on a temp turbo untill you get the good one back, or will it be a fitment issue?

jimfoo · « **Reply #14 on:** March 17, 2009, 04:26:27 pm »

nope, this one has a totally different exhaust housing, so I'd have to redo both manifold and downpipe.