3rd Gen VGT Holsets?
 

Can we easily use the 3rd gen variable guide vane holsets? Seems like they are dirt cheap on e-bay. Even if we used them as a non-VGT is that possible?....

Anything is easy. Joking aside they are not a bolt in. The first problem is they have a T4 flange instead of the T3 which requires an adapter or some machine work to make it work. Then you need to figure out how to make the electronics work. Its been done but I am still waiting to see a really good setup for a daily driver. I just did they HE351 swap yesterday to carry me till then as I have a VGT sitting around.

check out fleece performance. You can get on youtube and check out their vids. They have made a standalone controller.

Went to fleeces web site before and it isnt listed and I am not calling about it. Dont think that it will work for us mechanical pump guys anyways. No sensors installed to tell it what to do.[laugh]

Yeah I have checked into the Fleece chip to run the VGT turbo and they emailed me back and the chip is like kinda salty, cant remember exactly but wanna say it was like 400 bucks or something, but they are all together kind of expensive for my wallet. But they do sell the chip now you just have to email them and ask or call.

It can be done..I have seen it on other forums with the controller

Working on mine right now--going to emulate this:

http://www.youtube.com/watch?v=BnHGbN67PIM


Tons of good reading here: http://www.competitiondiesel.com/for...ad.php?t=48297

It's a great upgrade from all I've read, and when done properly, you have 1)no electronics to fail 2)exhaust brake 3)no electronics to fail 4)60mm compressor w/ extended tip tech 5)no electronics to fail 6)wicked spool AND manageable drivepressure on the top end and 7)no electronics to fail...

I should be up and running (electronics-free, of course[laugh]) by mid next week.

Oh, and it's not a t-4 foot, it's a t-4i, just another way for holset to make things extra special...

So, is the HE351 a good turbo for our 5.9s? It seems that a lot of the 3rd gen guys are ditching their OEM turbos...

G1625s: keep us informed on how the mod works....

Keep us updated on your progress, I'm very interested in seeing how this works.

At the risk of looking dumb, can someone tell me exactly how the variable geometry is controlled on the turbo? What I mean is, what is directly attached to the turbo that controls the actuation of the variable geometry. I've been reading about this from various threads and other sites, and I'm seeing where some people use wastegate actuators, some are using pneumatic cylinders, some are using levers and springs, and some are using electronic solenoids, but so far I haven't seen a good picture of exactly what is moving. I'm getting real confused. Could someone explain this to me?

here this is whats moving...
http://www.youtube.com/watch?v=FLZHj-EPj0g

Thanks for the link. I'm real tempted to try one of these. Even though electrical circuits is not a strong suit of mine, I would think something could be made fairly simple to run off the throttle linkage.

Would it be possible to connect a throttle position sensor somewhere on the throttle linkage, run it to a homemade circuit board that controls the electric solenoid or stepper motor that moves the actuator on the turbo in a progressive manner depending on the position of the throttle linkage. That is, if the throttle linkage is at rest (at idle) the sensor detects that and moves the solenoid to the closed position on the turbo to act as the exhaust brake and to aid in cold-weather warm up. As the throttle pedal is pressed down, the solenoid or stepper moves the linkage on the turbo to prevent overboost and/or excessive drive pressure. You could even have an override switch in there to open the exhaust all the way to help improve turbo-cooldown before you shut the engine down.

I am sure it's more complicated than this (isn't it??), but I'm just thinking off the top of my head.

What about the exhaust elbow on this turbo. What size is it? Will the four inch downpipe from an HX40 fit this, or do you have to use something else?

Any ideas? Comments??

Okay, at the risk of sounding really stupid, maybe because I don't have one of these to play with and don't really understand what is accessible for controlling the motion of the turbo, but would it be possible to simply connect the linkage of the throttle by a cable to the controlling mechanism of the turbo?

I guess what I'm thinking is about what I was saying in the previous post, only instead of messing with electronics/electrical components, we rely on a mechanical connection. If the motion isn't one to one, it might be possible to hook things up via a bell crank so that the rate of motion of one can be adjusted to match the other.

I really need to get one of these to play with so I have a better idea of what I'm talking about...[duhhh]

No, because it needs to operate independently of throttle position. If it opened all the way when you opened the throttle then it would never provide more than a few psi of boost.

I figured it was more complicated than I was thinking it would be, otherwise everyone would be doing it.

So is it just a matter of trial and error to find the right rate of opening/closing the exhaust housing for each engine? I mean, it would depend on whether it's a stock engine or if other modifications were done to it to find the right rate of controlling the boost, right?

I'm still liking the idea of connecting it to the throttle linkage and controlling it with some kind of a variable/adjustable bell crank, like an eccentric-shaped cam on the turbo to vary the rate that controller opens. I would really like to avoid electrical component complications if I can.