Holset swap info and flange adapter - page 1 - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• Holset swap info and flange adapter by RunninWild on 15 Feb, 2017 22:05
• I just ordered a HE211wg for my AAZ. I've looked around at what exactly needs to be done to make it work on our engines. The information has been scattered and some of it is hard to find so I figured I would collect it all into one spot for anyone looking to do this swap. I still have some questions and hopefully others can chime in and make this a good resource. I'll update this as others pitch in.
  
  I'll start with the adapter plate for mounting the turbo onto our vw manifolds
  These are pictures of the 2 different flanges we are trying to mate.
  Vw exhaust flange diemsnions
  
  T25 Exhaust flange dimensions:
  
  
  
  You need roughly a 3 1/8" x 4 1/8" piece of steel I'm using 11/16" (16mm) thick as I found a piece at work, this needs to be roughly 3/16" or thicker then the head of the allen head bolts you use. Alcaid says the holset turbo flange is threaded to accept M8x1.25 bolts. The bottom 4 holes should be drilled to 9mm,  the middle 2 holes should be then counter sunk with a 14mm drill bit roughly 9mm or 10mm deep, the top 2 holes I would suggest drilling and tapping for the hardware of your choosing. I'm going with 10mm bolts on the top over 8mm because I think it will help center the flange in the manifold slightly as it originally used 10mm hardware.
  
  
  Is what your adapter should look like when finished
  
  The oil feed fitting required is M10x1.25 thread and should run a AN-4 hose with no restrictor. Alcaid says the stock oil feel is sufficient diameter however he suggests always replacing the lines when installing a new turbo. The oil feed banjo from the filter housing is M12x1.5.
  
  The oil drain is a standard T3 oil drain flange with 2 M6x1.0 thread bolts. Holset recommends the drain be no less then 30 degrees to horizontal, and have a minimum internal diameter of 14mm, AN-10 or 5/8" would work perfect. The AAZ drain hole is threaded for M18x1.5 fitting.
  
  The compressor inlet and outlets use a 2.25" V band fitting. A 2.25" silicone hose may or may not fit over the v band mount and work with a clamp.
  
  He221w user manual http://myholsetturbo.com/manuals/HE221W.pdf The general information is the same between the he221w, he211w and he200wg as far as I know.
  
  If anyone documented how they clocked the turbo feel free to post it. I'm installing this in my samurai so I have plenty of room and its not required.
  
  The
  
  Special thanks to Alcaid for supplying the information I havn't been able to figure out on my own. He's also the man to talk to when you are ready to order a turbo. Alcaid AKA Peter Lonning: [email protected]
• #1 by Jo3kr on 15 Feb, 2017 22:30
• Oil feed M10 x 1.25
  
  
  Sent from my iPhone using Tapatalk
• #2 by vanbcguy on 16 Feb, 2017 00:23
• Made this a sticky!
  
  Sent from my XT1097 using Tapatalk
  
  
• #3 by TylerDurden on 16 Feb, 2017 11:03
• Quote

  Does anyone know the distance from the bottom bolt centers to the top bolt centers? I feel like I'm missing that dimension from the drawing.

  
  If the same as 1.6, I'll go with 27mm off the horizontal centerline.
  
  
  
  There seems to be plenty of room around the bolts... 10mm shanks, 12mm holes
• #4 by RunninWild on 16 Feb, 2017 13:13
• Thanks for contributing! So bolt center to bolt center is roughly 54mm or is that outside to outside? Hard to tell on the the pic. Are you fairly certain 27mm from the center of the exhaust bore is accurate? I was planning on taking my turbo off to measure before I drill the holes but if you are confident I'll trust you.
  
  I'll send alcaid a pm tonight and see if I can get a bit more info from him. I'll also attach his contact info to the thread so people can order from him if he wants me to.
• #5 by TylerDurden on 16 Feb, 2017 13:59
• 54mm is the center to center distance. I just divided in half.
  
  I'll measure the whole thing and post the values to compare.
• #6 by TylerDurden on 16 Feb, 2017 18:03
• This is the flange on the exhaust manifold I have handy.
  
   
• #7 by RunninWild on 16 Feb, 2017 21:11
• I had a turbo gasket show up in the mail today so I will just use that. But your measurement is the same as I got. 2 1/8" bolt center to center
• #8 by 4x4_Welder on 16 Feb, 2017 22:54
• Good info, thanks.  I may explore a more ideally suited turbo for mine rather than just slapping on what I have.
• #9 by Jo3kr on 20 Feb, 2017 22:21
• The compressor outlet and inlets you can get a silicone hose on no problem; however my turbo took a 3" silicone hose on the inlet. And the outlet I used the factory original 1.6TD silicone hose. All I did was use a hose clamp on the ring of the vband. Takes a few tries to get it to hold real well.
  
  I got mine tuning in pretty well and here's a quick comparison from the old Garrett T4 to the Holset.
  
  Garrett T4 EGTs WOT would peg it at 1600 easy (no intercooler factory) 10-13 psi boost.
  
  Holset He221w EGTs WOT I have yet to exceed 1050F at 17 psi.
  
  My fuel screw is the same it was when I had the Garrett on and it smoked like a train at WOT however the Holset uses every little bit it can get; right now I'm turning it in little by little I went from 10psi to 15psi with just a quarter turn.
  
  The biggest problem I ran into is the downpipe; nearly impossible to find the correct vband for the flange your better off sliding a 3" vband over the original and welding it like I did. I have plenty of pics upon request.
  
  And my oilfeed is simply 4an and the return is a homemade flange with a pipe welded onto it coming out about 3-4 inches with SS braided line to the pan.
  
  Sent from my iPhone using Tapatalk
• #10 by RunninWild on 20 Feb, 2017 23:39
• are you running a intercooler with the holset? 1050f leaves quite a bit of room for more fuel! If that is without an intercooler I probably wont even bother with one. I'm hoping to run 20-25psi but might be hard to resist cranking it up further haha.
• #11 by RabbitJockey on 21 Feb, 2017 09:40
• do you mean t3?
• #12 by Gizmoman on 15 Mar, 2017 23:20
• Nice to know I contributed something. The Holset is a great turbo for sure.
• #13 by Gizmoman on 27 Mar, 2017 18:15
• Here's the drawing of the adapter shown in the photo above
  
• #14 by phaetonv10 on 16 Nov, 2022 01:21
• is this thread still alive??
  
  I just ordered the holset he211wg with a 4cm turbine housing for my 1.6td. will be running the stock pump for now with an FMIC.
  this thread has answered most questions regarding the manifold flange adapter. I have a few questions regarding the oil supply line.
  
  1- what are the threads on the stock oil line nuts??
  2- If I go AN fittings, what fitting/threads would I need for the new turbo side and what threads will fit at the oil filter flange end??
  
  Cheers