Silencer? Are you thinking of the ported shroud compressor cover? Holset uses 4 long slots I believe, they are there to allow a small but critical amount of pressure to bleed backward through the housing under some circumstances when compressor air flow is low at relatively high boost pressures and the compressor is close to surging backward.

Ok thank you, someone on youtube called it a silencer? Without really being able to see it I was not sure what it was. Sounds like an anti surge mechanism.

To confirm, the variable a/r device always has a portion of itself inside of the turbine housing veins, correct? Sometimes a small portion of the fin and sometimes the entire fin?

Yes those veins slide in those slots and remain in them a slight bit like your saying even when fully open that ring with the slots spins in the turbine housing making it clockable.

As for the Silencer yes just a little louder turbo whine there normally removed.

Awesome thanks. That silencer might be worth taking out too, as that whistle is flat out awesome.

Do you all have a source or part numbers for the electrical connectors for the VGT section and for the speed sensor for the vehicle side of the connection(short of cutting them off of a truck)?

Ok, since I don't have one in front of me can you explain why? Is it an anti surge apparatus as well as a silencer?

No, anti-surge ports are part of the compressor housing so it's not removable. I was guessing cause there was no pic, and I guessed wrong and I shouldn't have guessed sorry. Anyway could you post a pic of those silencer your talking about?

I couldn't find a good picture of it, but you can see it removed in this youtube video

@hakcenter is also developing an awesome controller for these things. Hit him up or hop over to http://forums.ds-map.net/. His work has been making me want to run one of these on my long-rod 2.4L.

I just searched and didn't see anything from him on that site? Do you have a link to what he is doing?

I'm also wondering who has actually ran one of these turbos while manipulating the variable geometry? I see all over the net posts referencing how "There is a 2.4L DSM making 22psi@1400rpms, then 30psi@2200rpms" and a "destroked 2.1L SRT-4 they are seeing 17psi@1700rpms" but I can't find any information, threads, dynos, posts or anything about it?

maximum9898 said:

Do not take out the silencer on the he351ve!!! It has an extended tip and you will do more harm to the turbo over gaining performance.

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Do tell about this "extended tip" HE351VE and how removing the silencer ring (which can't be removed on the HE351VE because it's part of the housing instead of a separate piece held in place with a snap ring like the HX-series) would make the turbo less-reliable.

I've never seen any solid results besides the one member I Mentioned on this fourm that has seemed to have Disappeared since then. I would be interested should you find some though.

I'm assuming this guy assuming thinks this has extended tip compressor wheel based on that the compressor wheel extends up past the MWE groves in the compressor cover though all the holsets with MWE do. None the less I wouldn't put to much concern on the silencer ring.

Ok I won't worry about it. I would like to know if this car had the ring removed or in place though? This car sounds ridiculous!

I'm going to assume it did as there not as easy to remove as the other holset turbos. If your going through all this trouble just to achieve the sound I think you picked the wrong turbo.

Nope, the sound is just an added bonus. Torque potential is what interests me most with this turbo.

Google "video of Borg Warner variable geometry" and watch the first video. U will see their system in action. The way thr vanes rotate to change attack is fantastic. Honestly, any one spending time and money to get the yestertech holset up and running is a fool. This thread piqued my interest. I searched a bit and called some parts counters and they now have a complete range to market, u just have to track down individual applications. They have vgt borgs now from 100hp to 600 plus. They are so much more compact. I have a 350-400hp unit, (a working cutaway from 997 turbo school in germany)and its physically tiny. Picture a 14b with bep bolt on DSM housing. That's the size of it.

maximum9898 said:

Do not take out the silencer on the he351ve!!! It has an extended tip and you will do more harm to the turbo over gaining performance. I've actually ran one and build a custom waste-gate to control the turbo. And also the only reason to ever remove the "silencer" is just to make more noise. You are not gaining anything taking them out.

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really. That's a cool story. What were ur results running that bad boy?

Found the turbos weight, it is 46 lbs without the cast exhaust downpipe reducer piece on it but with the vgt controller on it.

Thanks for all the Holset info it has really helped my build..

@maximum

I'd love to hear more about spool times and boost. I've had a hard time finding anyone that has actually posted boost vs rpm logs or data ... just a lot of the same repeated chatter on the internet.

Can you share your experience with that? And if you feel your spool is optimized?

Thanks

maximum9898 said:

Let me start with the compressor ring, it is removable. There are three dowel pins that hold it in place. I even have pictures to show the dowels had been drilled out and replaced.

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I would love to see these photos as I combed my HE351VE's cover last night and didn't see any possible way the ring is removable. If it IS a separate piece, it's pressed in place and you'd probably end up destroying it trying to get it out of the inlet.

maximum9898 said:

And in my own experience the turbo was spooling slower. I may even have the logs that can prove it.

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That must be in your imagination- freeing up any intake restriction is not going to make the turbo, which is driven entirely by exhaust energy, spool slower. That's like claiming you ditched a factory draw-thru MAS and your turbo spooled slower as a result.

maximum9898 said:

I should have said that if you remove the compressor ring. It looks like it has a extended tip with the compressor ring removed. Because if you take the ring out it really doesn't look proper. And to me, I personally think it would do more harm than good. All my knowledge is my personal experience with running the turbo for two years on my car.

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While I do enjoy reading your expert analysis on the subject, you DO realize what an "extended tip" compressor wheel is, right? The exducer tip height is taller, thereby extending the exducer spec beyond the backplate of the wheel.



If you can see your compressor exducer tips by looking into the compressor inlet, you have bigger problems than worrying about a silencer ring being place or not.

maximum9898 said:

Here's my build thread I started after blowing my motor with this turbo.
http://www.dsmtalk.com/forums/showthread.php?t=238975

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No offense...but you chose to run a 70 lb/min turbo with stock pistons and rods. How did you really think that was going to end? Can't exactly blame the turbo for that one.

I'd like to hear your experience. Would you mind posting spool information or logs with this turbo please?

maximum9898 said:

Wow you are completely correct I just seen a longer wheel. I guess I didnt understand extended wheel. I really just meant longer wheel.


But dang man I wasn't trying to say anything against anyone. Or claim I'm an expert I know that I'm not. Lots of people run stock blocks. I was just saying what I have done in the past to my car. I'm sorry I ever posted... Didn't know you don't want to hear anyone's opinion or experience with something...

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I already have everything lined up, I'm making a loom next week, waiting to either mill my own adapter or just fork out the money for the one on ebay to mount it, either way, all the hard work is done.

I'm going to try to find an investor, and produce probably 50-100 units, since cost is pretty low honestly, and just engineer a arduino shield with everything it needs on it, and engineer another box for it, with some 12-15 pin connector housing. I've got the VR circuit on and working, just can't find anything to spin the turbo fast enough to verify circuitry since its low voltage at ~1200rpm.

For those about the silencer ring >
http://forums.ds-map.net/development/he351ve-controller/msg7199/#msg7199

You can remove it, I chiseled it off cause I couldn't find anyone saying that the inner velocity ring was a part of the outer. So I have a unit on the printer either today or tomorrow and see fitment. Making it with anti surge holes, which is cool. You need the inner ring to help with air velocity and direction, I wouldn't suggest taking the whole ring out then running it open compressor wheel.

Were some posts deleted?

Maximum9898, can you share your logs or dynos or anything else about your experience with this turbo?

gte said:

@maximum

I'd love to hear more about spool times and boost. I've had a hard time finding anyone that has actually posted boost vs rpm logs or data ... just a lot of the same repeated chatter on the internet.

Can you share your experience with that? And if you feel your spool is optimized?

Thanks

Click to expand...

Where did you get the connectors from? Care to share that?

hakcenter said:

I already have everything lined up, I'm making a loom next week, waiting to either mill my own adapter or just fork out the money for the one on ebay to mount it, either way, all the hard work is done.

I'm going to try to find an investor, and produce probably 50-100 units, since cost is pretty low honestly, and just engineer a arduino shield with everything it needs on it, and engineer another box for it, with some 12-15 pin connector housing. I've got the VR circuit on and working, just can't find anything to spin the turbo fast enough to verify circuitry since its low voltage at ~1200rpm.

For those about the silencer ring >
http://forums.ds-map.net/development/he351ve-controller/msg7199/#msg7199

You can remove it, I chiseled it off cause I couldn't find anyone saying that the inner velocity ring was a part of the outer. So I have a unit on the printer either today or tomorrow and see fitment. Making it with anti surge holes, which is cool. You need the inner ring to help with air velocity and direction, I wouldn't suggest taking the whole ring out then running it open compressor wheel.

Click to expand...

I got em from mouser, was a ton of fun researching the right crap, you can't just do a visual even though you know the manufacturer. If you're looking for part numbers once I have it mounted and running in my truck I'll update my thread with a BOM