Has anyone tried to use a Holset with Electronic Wastegate??

[Jeff99GS]

I'm looking at buying a Holset turbo off a 2008 Dodge Ram 6.7 Diesel. It has an electronic wastegate on it.
Does anyone know of a way to connect this with some kind of pressure switch in the IC pipe?

I was thinking if you had an adjustable pressure switch set to 20 psi that was tapped into the Intercooler pipe it could be used to open the electronic wastegate at 20 psi and it should hold perfect with NO creeps or SPIKES!

What are your guys thoughts on this? Anyone tried anything like that??

 

[babyviper]

This thing does not look connected to the exhaust in any way, are you sure that's what that is? If so you need to get some better angles like from where it actually attaches.

BTW: To answer the question, no. Never used one nor seen anyone else use one.

 

[babyviper]

Never mind I found the answer. as quoted: "To provide steady boost, the pitch of the vanes on the turbine wheel adjust as turbo RPMs fluctuate."

2008 Dodge Ram 3500 Mega Cab 4x4 Diesel 6.7-liter VGT

 

[Jeff99GS]

I know this turbo is not set up to fit on our engine, but I wanted to buy it just to see how this works. Seems like a good idea if you ask me! I'm sure I could make some funky ass manifold to fit this beast on the Talon!

 

[mike96]

looks like a stepper motor to me, which would make sense to use a stepper motor to control the vanes to the turbine and control the speed of the turbo. if thats the case you would have to come up with a stepper control device that you could program, or figure out how to completely change that motor out for a regular DC motor. even then you would need something a little more complex than just one pressure switch to make it work... can you find a wiring diagram for the dodge it came out of? that will better tell us what kind of motor is on that turbo, unless you can find some info on the turbo itself. not totally un do able, but probably a little more of a PITA than it would be worth.

 

[babyviper]

let me break this down for you, this is not an electronic wastegate neither will it give reliable wastegate pressure. I think if you got the VGT to work it would be great because you would get quick spool-up without sacrificing restriction because the vanes will open up at high rpm. I'll try to do some research on a VGT controller. Supposedly a person on a VW-TDI forum has already done it but I don't have access to their forum.

 

[babyviper]

Effin sweet check out this thread.

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VWvortex Forums: anyone with experience with the Holset VGT system

 

[420a-t]

There's two guys on here in the holset thread that's done this. One of my buddies has one up for sale and he told me that it worked great, but that he went a diferent route. He used an apexi boost controller to control the vanes in the turbo

Let me know if youre interested in his setup. I can get you in touch with him

 

[babyviper]

dam , I heard the same thing to. There are a couple of guys on HMt working on it also.

 

[brian9397gsx]

i currently have one of these turbos collecting dust in my garage i would be willing to part with it as funds for the project dried up. pm me if you are interested

 

[dsmconvict]

I think someone on here actually is using one. I know his name on RHMT is aero..... dont know what hes on here as.


Heres the link to his rhmt build thread.

1995 Eagle Talon TSI AWD Holset HE351VE VGT Build thread. (No 56K)

 

[MidShipCivic]

Some tuners have used this on a turbo Honda on Honda-Tech controlling it's pulse width.

The system does not require wastegate's because the vanes actively direct exhaust gas flow, however wastegates may be used to prevent overboosting.
The lastest sport car to be using this technology would be the 07 911 turbo.

 

[aero_sallee]

Posting from my phone so it's gotta be short. That's my thread on rhmt.
You will have to have an external gate when using one on a gasoline engine. The vgt alone will not open far enough to hold boost down. Fully open on my 2.4 boost was climbing exponentially past 24psi at around 4500 rpm.

This is a completley different style of variable geometry than what is used on the 911 turbo.
I'll try and answer some more when I get to a computer.

 

[airmail96]

I plan on running one of these when I get back and get another DSM. I know there was another member on here danyz250f that was using it on a 2.0 think he said positive boost at 3000k hitting hard at 5 -5.5k he said the max he could get out of the setup was 435 at 29psi logging a max of 57lbs/min avergaing mid to low 50s psi that was with a jmf mani, 272/272's, and qtp cut out said he thinks his WG spring was holding him back.

 

[MidShipCivic]

This is a completley different style of variable geometry than what is used on the 911 turbo.
I'll try and answer some more when I get to a computer.

No, it is not a completely different way they all use the common practic of using vanes to to guide exhaust flow.

 

[aero_sallee]

No, it is not a completely different way they all use the common practic of using vanes to to guide exhaust flow.

While they all have vanes the way they use/adjust them IS completely different.

 

[2slow4utsi]

Why would you want a VGT? It's like having powered seats or a sunroof...full of FAIL. Just makes more shit that can fail. Roll up windows, no A/C and so on. How can you have to replace something that doesn't exist? WINNNNNNN!!!

 

[aero_sallee]

Why would you want a VGT? It's like having powered seats or a sunroof...full of FAIL. Just makes more shit that can fail. Roll up windows, no A/C and so on. How can you have to replace something that doesn't exist? WINNNNNNN!!!

Because the actual VGT mechanism in the Holset systems is very reliable, an simple with only one moving part in the hot area of the turbo.
With a simple wastegate actuator controlling it you can have an effective smaller than .3 A/R housing during spoolup and as soon as boost comes up it opens to a an effective housing larger than 1.5 AR. From ~3cm^2 to 25cm^2 nozzle area. Makes a nice wide powerband with plenty of lowend torque as well as increased high rpm power. All in a turbo you can pick up for $80-200 any day on ebay with very low mileage if willing to make it fit. For a GT35R sized turbo that will spool better, with better transient response, for that price its hard to beat if you are willing to do the work to make it fit.

For strictly drag racing its probably overrated since you will always be at high RPM. For a DD or street driven car its amazing. Incredibly quiet off boost also.

 

[knochgoon24]

I've looked into making a circuit that drives a stepper motor based on RPM, throttle position, and boost pressure. I'm rooming with a computer engineer at college this year, so I may actually have the help I need to make this possible.

Basically, it would lookup the RPM and throttle position and get a starting value of the position it should be in. Then, it would "trim" that value based on the current boost pressure. It should just take 1 2D table and a trim formula(s).

It sounds good on paper, but implementing it will be the fun part.

It would be really cool if it could self tune to a desired boost level...

 

[MIdsm]

Possibly something like this tps/rpm based dc motor controller?

"http://www.ignitech.cz/english/aindex.htm"

 

[MidShipCivic]

I've looked into making a circuit that drives a stepper motor based on RPM, throttle position, and boost pressure. I'm rooming with a computer engineer at college this year, so I may actually have the help I need to make this possible.

Basically, it would lookup the RPM and throttle position and get a starting value of the position it should be in. Then, it would "trim" that value based on the current boost pressure. It should just take 1 2D table and a trim formula(s).

It sounds good on paper, but implementing it will be the fun part.

It would be really cool if it could self tune to a desired boost level...

Many EMS will control the stepper motor that comes on the holset.

 

[aero_sallee]

Its not a stepper motor though. Its a 3 \[phase brushless DC motor from the information I've gotten from guys working on a motor controller for it. To even get to that level though you have to bypass all the electronics inside the controller and wire directly to the motor.