Can anyone explain the anti-surge housing on my turbo?
#26
NASA geek
iTrader: (2)
If this is such a hot thing to do to turbos, why isn't it done to some of the bigger, big boost turbos? All I see is talk about the ASME funnel...but nothing about this surge crap.
And why isnt it done on high boosting big turbo's??? What GT35, GT40, HKS T51, and Y2K aren't big high boosting turbo's?????
Why is the HKS T51R Kai smoother out and the Garrett design looked like some ash tray?
I don't have all the answers, you can always do a research paper for us and report back to us Search the net, but I bet you'll find better technical explanations in papers that describe the ported shroud on turbine engines. May find something on turbo chargers, but all I found in a brief search is the Power Stroke turbo from ATP.
~Mike..............
#27
NASA geek
iTrader: (2)
And to cap it off.... all the turbo's disscussed in this thread including the original posters and the HKS t51 and the Y2K pic I just posted HAVE PORTED SHROUDS, their not some adapter or an after thought of the manufacturers to go up a size on the inlet diameter. They have a purpose be it applicable to OUR application or not. This isn't a urban myth I swear . besides, explain the bleeds.
~Mike............
~Mike............
Last edited by RacerXtreme7; 03-17-04 at 05:57 PM.
#28
Rotary Enthusiast
iTrader: (3)
Join Date: Apr 2001
Location: las vegas, NV
Posts: 936
Likes: 0
Received 0 Likes
on
0 Posts
One thing that i would like to point out......Ted said that this is the "hot new" thing. It actually is. If you look around at quite a few of the turbo sites they are all starting to offer this as an upgrade. I've heard a lot of people talking about it lately as well. The Supra guys are buying these compressors up as fast as they can. I've seen and heard about these before but within the last 6 months or so it's getting a lot bigger.
The Supra guys are claiming all kinds of benefits associated with this compressor. I've never heard anything positive or negative really from these guys before or after. It seems as though it's just another way to make money.
The Supra guys are claiming all kinds of benefits associated with this compressor. I've never heard anything positive or negative really from these guys before or after. It seems as though it's just another way to make money.
#29
Administrative Me
Thread Starter
Join Date: Feb 2001
Location: Kansas
Posts: 1,370
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by silvr94r2
One thing that i would like to point out......Ted said that this is the "hot new" thing. It actually is. If you look around at quite a few of the turbo sites they are all starting to offer this as an upgrade. I've heard a lot of people talking about it lately as well. The Supra guys are buying these compressors up as fast as they can. I've seen and heard about these before but within the last 6 months or so it's getting a lot bigger.
The Supra guys are claiming all kinds of benefits associated with this compressor. I've never heard anything positive or negative really from these guys before or after. It seems as though it's just another way to make money.
One thing that i would like to point out......Ted said that this is the "hot new" thing. It actually is. If you look around at quite a few of the turbo sites they are all starting to offer this as an upgrade. I've heard a lot of people talking about it lately as well. The Supra guys are buying these compressors up as fast as they can. I've seen and heard about these before but within the last 6 months or so it's getting a lot bigger.
The Supra guys are claiming all kinds of benefits associated with this compressor. I've never heard anything positive or negative really from these guys before or after. It seems as though it's just another way to make money.
I felt funny when the Supra guy was asking me about my anti-surge housing, for at the time I didn't know what in the heck he was talking about.
#30
Freedoms worth a buck o'5
Join Date: May 2001
Location: Calgary Alberta Canada
Posts: 2,544
Likes: 0
Received 1 Like
on
1 Post
Yeah ported shrouds have been around along time, I once found a detailed explantion on the ported shroud mechanics, complete with engineering data on it, on a schwitzer oriented website, I cannot for the life of me find it though, or remember the search criteria I used to happen across it, I wasn't looking for the shroud info at the time though...
My current t04e has the ported shroud, it was not a performance based t04e to begin with, its real application is on 8.0 litre ford diesels, from the early 80's to the late 90's in application...
Someone earlier said that it had an application on preventing surge on diesels when airflow exceeded requirements, and this would make sense as well, given that diesels don't run throttle plates, and thus no real need for a bov for most of the operating spectrum of the compressor, a simple device such as ported shroud to prevent minor surging at low speeds or deaccellaration, would probably extend the life of the turbo in long haul applications, aka heavy truck use, without adding another potential trouble spot to the turbo system by adding a bov with its hoses, springs, and valve/seat, the bov is a real simple device, but the idea on industrial diesel application, is to make something as simple as possible and to keep it that way...Max
My current t04e has the ported shroud, it was not a performance based t04e to begin with, its real application is on 8.0 litre ford diesels, from the early 80's to the late 90's in application...
Someone earlier said that it had an application on preventing surge on diesels when airflow exceeded requirements, and this would make sense as well, given that diesels don't run throttle plates, and thus no real need for a bov for most of the operating spectrum of the compressor, a simple device such as ported shroud to prevent minor surging at low speeds or deaccellaration, would probably extend the life of the turbo in long haul applications, aka heavy truck use, without adding another potential trouble spot to the turbo system by adding a bov with its hoses, springs, and valve/seat, the bov is a real simple device, but the idea on industrial diesel application, is to make something as simple as possible and to keep it that way...Max
#31
Old [Sch|F]ool
A BOV wouldn't work (or be necessary!) on a Diesel. No throttle plate, remember? So no throttle plate to slam shut and generate manifold vacuum with which to open the BOV. Also, no throttle plate to slam shut and make the turbo try to flow ~0lb/hr while still spinning fast.
Last edited by peejay; 03-20-04 at 09:21 PM.
#32
Lives on the Forum
Originally posted by RacerXtreme7
You have to think out side the proverbial "performance car" box and realize that turbo's are meant and manufactured for other applications other then making your car go fast. Turbo's are found on agricultural engines, big rigs, water pumps, and generators etc. that have different requirements and operate in different ranges then a passenger car.
You have to think out side the proverbial "performance car" box and realize that turbo's are meant and manufactured for other applications other then making your car go fast. Turbo's are found on agricultural engines, big rigs, water pumps, and generators etc. that have different requirements and operate in different ranges then a passenger car.
I thought you were knowledgeable enough to understand something as trivial as surge. Airflow doesn’t necessarily reverse, but pressure waves and sound waves do. More or less its pressure stacking up to the point it reaches the compressor. The comp is over whelmed and not much pumping goes on relieving pressure (eventually the engine gulps up this stack while the the flow stalls relieving pressure built up) then this unloading lets the compressor do its deal and make more boost which begines to stack up again etc. And yah, if you have AIRFLOW backing up that far something is WRONG and the surge is extremely severe. Your turbo won't be able to handle that.
See the attached pic, I highlighted the bleed ring in green, YES there is bleeds in that turbo compressor housing. And it’s called a PORTED SHROUD.
Thank you very much for the clarrification.
I haven't seen things like this except on Garrett units. I don't believe any of the other well-known turbo manufacturers include this design in their compressor housings? I know KKK / KKR runs very small compressor inlets, and there is no surge housing designed into them - but then again, I think they are primarily an automotive turbo manufacturer (Porsche , Audi, etc.)?
-Ted
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM