1. We will be moving the site to a new server over the weekend. Please excuse the downtime and potential errors while browsing. We'll send a note out once everything is back up and running smoothly. Thanks for your patience!

Should I Port My .55 AR BEP Housing's Wastegate or not?

Posted by szutavern, May 17, 2017
Turbo System Tech - 4G63 turbos, Intercooling, Boost Control, Wastegates, etc.

Please Support Boostin Performance
  1. szutavern

    szutavern Proven Member Lincoln, Nebraska

    Joined:
    Apr 5, 2005
    Posts:
    16
    Likes Received:
    0
    Hey DSM freaks, Should I Port My .55 AR BEP Housing's wastegate port or not?

    Overtwisted my HTA68 and now replacing it with a HX40 with a BEP and external dump off O2

    Shooting for about 500hp this season +600 next and yes I have all the supporting mods that will get me there
    31psi
    2100 injectors on E85
    Tial 44 Wastegate external dump

    Lemme know your thoughts

    Mucho thanks

    Been trolling this site forever, first time posting question.
     

    Attached Files:

    #1
  2. SOADweskey

    SOADweskey Proven Member Jacksonville, Florida

    DSM Profiles:
    1
    Joined:
    Dec 11, 2006
    Posts:
    704
    Likes Received:
    48
    I'm running a HX-35 in that housing. I have not ported my wastegate opening at all and during engine break in I had no trouble with my turbo maintaining the 17psi that my wastegate (Tial 38 MVS recirculated) spring was set at.

    Maybe someone with a HX-40 can chime in but for me there was no need to port it and boost creep was not a problem.
     
    #2
  3. 1990TSIAWDTALON

    1990TSIAWDTALON Proven Member Independence, Kansas

    DSM Profiles:
    3
    Joined:
    Nov 14, 2013
    Posts:
    2,177
    Likes Received:
    541
    Anything you can do to reduce back pressure on that .55 housing will be good. I was running one and had problems on the hot side, getting all of the exhaust out that little hole. I broke 2 HX40's before I went to a .70 T3. I snapped one exducer off clean at the shaft and the other looked like this...

    20170427_162424 resized 50.jpg
     
    #3
  4. szutavern

    szutavern Proven Member Lincoln, Nebraska

    Joined:
    Apr 5, 2005
    Posts:
    16
    Likes Received:
    0
    Thanks 1990

    So port the sheeait outta it... is that what you would do?
     
    #4
  5. ceedawg

    ceedawg Supporting Member laurelton, New_York

    DSM Profiles:
    1
    Joined:
    Jun 2, 2004
    Posts:
    1,284
    Likes Received:
    193
    Go .70 ar housing. More efficient,turbo will live and not be overworked. No porting necessary. 55 too much back pressure and has damaged many an hx40
     
    #5
  6. szutavern

    szutavern Proven Member Lincoln, Nebraska

    Joined:
    Apr 5, 2005
    Posts:
    16
    Likes Received:
    0
    thing is i have a .55 ready to go. Should I open it clear up to match the gasket?
     
    #6
  7. ceedawg

    ceedawg Supporting Member laurelton, New_York

    DSM Profiles:
    1
    Joined:
    Jun 2, 2004
    Posts:
    1,284
    Likes Received:
    193
    Doesn't matter will still be too much backpressure. Big wheel in small turbine housing equals disaster. Sell it be patient and get a .70. Think long term not short term which will destroy your investment. Turbo that is. That 55 housing can be sold.
     
    Last edited: May 17, 2017
    #7
  8. 1990TSIAWDTALON

    1990TSIAWDTALON Proven Member Independence, Kansas

    DSM Profiles:
    3
    Joined:
    Nov 14, 2013
    Posts:
    2,177
    Likes Received:
    541
    After breaking HARD parts like I did, I recommend exacly what ceedawg suggested and what I finally did, go .70 or larger. It is the throat of the housing that is to small. @JusMX141 can tell you the same thing that we are. I have tried to use the .55, but hurt turbo's, so I went with something that could breath a little better, per suggestions to me :) Now with a HX35, the .55 housing seems to be ok, it is just the HX40's.
    Justin (JusMX141) would be the guy to ask if porting that housing will help you, hey Jus, give this man a little input please.
     
    #8
    Dstarperformance01 and ceedawg like this.
  9. jakelandry

    jakelandry Proven Member Minden, Louisiana

    DSM Profiles:
    1
    Joined:
    Oct 13, 2009
    Posts:
    723
    Likes Received:
    52
    How does opening the wastegate hole help reduce drive pressure? Wouldn't that mean you could just put the largest wastegate possible on the smallest exhaust housing and obtain great spool then just open the wastegate to have your exhaust housing flow better? Forget VGT technology i'm going purchase 5 wastegates off ebay instead.

    "The boost/backpressure ratios at different pressures and flows are set by the geometry of the turbo and cannot be altered by the wastegate. The wastegate can only be used to limit boost, the backpressure to drive that boost remains." -per random internet post I am sure will be disregarded. I'm fairly sure that the wastegate opening is only inadequate if you cant lower your boost however low you want it but I could be wrong.
     
    #9
  10. red_devil

    red_devil Proven Member Cape Coral, Florida

    DSM Profiles:
    1
    Joined:
    Jul 13, 2005
    Posts:
    907
    Likes Received:
    21
    What boost levels where you guys having issues? The problem isn't helped by the poor o2 housing options we have either.
     
    #10
  11. szutavern

    szutavern Proven Member Lincoln, Nebraska

    Joined:
    Apr 5, 2005
    Posts:
    16
    Likes Received:
    0
    Thing is the external dump O2 pipe will flow at least 2-3x what that BEP wastegate hole can flow. All I was worried about was controlling boost really. Much great help fellas. Keep it coming.
     
    #11
  12. 1990TSIAWDTALON

    1990TSIAWDTALON Proven Member Independence, Kansas

    DSM Profiles:
    3
    Joined:
    Nov 14, 2013
    Posts:
    2,177
    Likes Received:
    541
    Just to be clear, I never said opening it up would help. Justin has seen first hand what is happening with HX40's and the .55 BEP housing so I hope he chimes in. I have first hand experience that the dam thing chokes up and gets SUPER hot because it can't get out thru the THROAT, that is why I suggested .70 to save someone else the trouble. I hope that makes sense. You lose a little spool but it breathes better. It REALLY wants a bigger housing than a .70 to be honest.
     
    #12
    ceedawg and Dstarperformance01 like this.
  13. szutavern

    szutavern Proven Member Lincoln, Nebraska

    Joined:
    Apr 5, 2005
    Posts:
    16
    Likes Received:
    0
    Yep understand, unfortunately I am ready to bolt this biatch up today, and I looked at the tiny wastegate hole in it and said WTH?

    Guess I'll just have to keep it under 7,000 RPM till I get the funds for another upgrade DAMMIT

    ; )
     
    #13
  14. jakelandry

    jakelandry Proven Member Minden, Louisiana

    DSM Profiles:
    1
    Joined:
    Oct 13, 2009
    Posts:
    723
    Likes Received:
    52
    I too suggest going bigger than the .55. Turbolab sells a .82 p-trim housing I believe for 150. I did log 63 lb/min through my .55 at 38 psi all the way up to 8k rpm however.
     
    #14
  15. 1990TSIAWDTALON

    1990TSIAWDTALON Proven Member Independence, Kansas

    DSM Profiles:
    3
    Joined:
    Nov 14, 2013
    Posts:
    2,177
    Likes Received:
    541
    Yeah I would use it. With the .44 WG you will be better off. I am running the .38. It's small but it's all I had :)
    You can get your 500hp with it, just keeping you informed on what is happening with other setups!
    I had to go get my "Boost Fix" a second ago. I needed to move the car to put my sons toolbox in the garage....38lbs, 587ish :D so I feel better now. Good luck and if you have any more questions, that is what I WAS using and still have a BNIB .55 for another project so feel free to ask. I will tell what I have experienced. :thumb:
     
    #15
  16. szutavern

    szutavern Proven Member Lincoln, Nebraska

    Joined:
    Apr 5, 2005
    Posts:
    16
    Likes Received:
    0

    Haha thanks homes much appreciate your help.
     
    #16
  17. iugrad92turbo

    iugrad92turbo Proven Member Kalamazoo, Michigan

    DSM Profiles:
    1
    Joined:
    May 22, 2007
    Posts:
    10,200
    Likes Received:
    244
    IL be running a hx40 in a .55 bep housing 10 blade turbo. This is a,street car any issues I'll be upgrading to a t3 set up from archer fabrication when the time comes. I got lots of tuning and work to do so well see.
     
    #17
    1990TSIAWDTALON likes this.
  18. 97gsxIA

    97gsxIA Proven Member Mount Vernon, Iowa

    DSM Profiles:
    1
    Joined:
    Apr 22, 2011
    Posts:
    359
    Likes Received:
    34
    I have an HX40 with a billet comp wheel and the .55 BEP housing.

    This is the porting I did on mine and I have trouble keeping boost stable over 34psi
    I would do this, and then little more.

    In a perfect world you'd want to get the hole to as close to the size of the wastage gate valve as possible. (this is not going to happen for us with BEP housings) but you can get damn close.

    I can only speak to my experiences, and I guarantee if you don't port yours out at all you will have trouble controlling boost from the get go with this housing.

    [EDIT]

    keeping it under 7K is not going to magically enable you to control your boost. It will spike at peak VE in your power band (or where ever max boost should hit for your setup) and continue to build boost after that point if you do not have adequate space to move the gases.

    18527738_10210809352968133_1350032063648268178_n.jpg
     
    Last edited: May 18, 2017
    #18
  19. Vegas smith

    Vegas smith Proven Member Houston, Texas

    DSM Profiles:
    2
    Joined:
    Dec 2, 2002
    Posts:
    1,236
    Likes Received:
    386
    So you had to move the car 20ft but instead went out pulled a couple car lengths on a turboed Busa? You have a boost problem :)
     
    #19
  20. 1990TSIAWDTALON

    1990TSIAWDTALON Proven Member Independence, Kansas

    DSM Profiles:
    3
    Joined:
    Nov 14, 2013
    Posts:
    2,177
    Likes Received:
    541
    Yeah, for the life of me, I can't get over "Boost Withdrawl's"!!!!
    Gotta have my fix, man!!! (at least it was a good excuse to go for a "spin") :p
     
    #20
  21. ceedawg

    ceedawg Supporting Member laurelton, New_York

    DSM Profiles:
    1
    Joined:
    Jun 2, 2004
    Posts:
    1,284
    Likes Received:
    193


    Keeping it under 7k won't keep it from boosting! Get the .70 housing don't waste your time by impatience time is money!!!
    Don't say we didn't tell ya! You'll be buying another turbo to replace the broken shaft or broken exhaust wheel in that turbo in no time. Then it's gonna cost you a turbo and a new .70 turbine housing. More than twice what you would have spent. Do it wrong ya do it long.
     
    Last edited: May 18, 2017
    #21
  22. 1990TSIAWDTALON

    1990TSIAWDTALON Proven Member Independence, Kansas

    DSM Profiles:
    3
    Joined:
    Nov 14, 2013
    Posts:
    2,177
    Likes Received:
    541
    You know, of all things, I didn't have surge. I had a bit of fluctuatuon but when it hit, it hit hard. It varied up top around 30+.
     
    #22
    iugrad92turbo likes this.
  23. szutavern

    szutavern Proven Member Lincoln, Nebraska

    Joined:
    Apr 5, 2005
    Posts:
    16
    Likes Received:
    0
    Thanks for all the help fellas. The "keep it under 7,000" statement shouldda been followed by a /scarc tag
     
    #23
  24. szutavern

    szutavern Proven Member Lincoln, Nebraska

    Joined:
    Apr 5, 2005
    Posts:
    16
    Likes Received:
    0
    Well I'm not going to be running the BEP housing anymore any recommendations to exhaust housings? goal i 700-900area
     
    #24
  25. red_devil

    red_devil Proven Member Cape Coral, Florida

    DSM Profiles:
    1
    Joined:
    Jul 13, 2005
    Posts:
    907
    Likes Received:
    21
    My hx40 recently failed and I couldn't figure out why. It was never pushed too hard never over 25psi or 42lb/min. Lasted 5 years before it failed though. I run a turbo blanket and header wraped o2. Wonder if it was the heat that caused it. *sigh* guess it's time to switch.
     
    #25

Share This Page

Support Vendors who Support the DSM Community
Ace Race Parts Advanced Fuel Injection Archer Fabrication Boostin Performance ECM Tuning Extreme Turbo Systems ExtremePSI Feal Suspension Fuel Injector Clinic Jacks Transmissions Jackson Auto Machine JNZ Tuning Magnus Motorsports Miller Import Parts Morrison Fabrication & Design OHM Racing Race Components Inc RockAuto RoadSurge Spultronix Performance STM Tuned Strictly Import Motorsports VR Speed Factory