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    Thread: Holset user thread

    1. Member Daskoupe's Avatar
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      05-20-2010 07:56 PM #1


      changes coming
      Last edited by Daskoupe; 06-02-2010 at 06:26 PM. Reason: Technical thread
      12.2@116mph-293whp305wtq 22psi stock aba-AC-DD My Jetta
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    2. Forum Sponsor Quintin@USRT's Avatar
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      05-21-2010 03:18 AM #2
      mine should be going on soon .... HX35


    3. 05-21-2010 04:53 AM #3
      holset hx35 12cm hotside
      12v vr6 8.5.1 compression
      megasquirt

      1psi around 2500 on data logs
      22psi at 3900 rpm

      hp calculated with injector duty cyle @ 420whp

    4. Member Kaos26003's Avatar
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      05-21-2010 05:56 PM #4
      Just getting ready to do this also. will give dyno numbers in a few wks.
      99 passat
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      AEB head P&P 3angle Valve job
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      Talked to the boys from Unitronics over the weekend at SOWO, Looking like a Me-7 was the only easy way to get a good tune. gonna start out with a 830cc file and go from there. i'll keep updating as i install and start to get numbers and spool rpms.
      KAOS

    5. Member Daskoupe's Avatar
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      05-21-2010 07:10 PM #5
      Quote Originally Posted by Quintin@USRT View Post
      mine should be going on soon .... HX35

      Q man what are the specs on it?I wanna get an HX35 for mine...
      Last edited by Daskoupe; 06-02-2010 at 06:30 PM.
      12.2@116mph-293whp305wtq 22psi stock aba-AC-DD My Jetta
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    6. Forum Sponsor Quintin@USRT's Avatar
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      05-21-2010 07:30 PM #6
      Quote Originally Posted by Daskoupe View Post
      Q man what are the specs on it?I wanna get an HX35 for mine...
      Compressor Wheel:

      Inducer: 56mm
      Exducer: 78mm


      Turbine wheel:

      Inducer: 70mm
      Exducer: 60mm


      comes with a twin scroll 12cm^2 t3 turbine housing...i just knife edged the divider since my manifold is for an open scroll...you can get a BEP .70a/r t3 open scroll housing for it however....
      Last edited by Quintin@USRT; 05-21-2010 at 07:49 PM.

    7. Member acee_dub's Avatar
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      05-22-2010 11:43 PM #7
      Are any of you using the oil filter housing for turbo oil feed?
      What psi does the oil run at from the top of oil filter housing?

      Holset oiling (HX30/HX32/HX35/HX40) (from holset site):

      12. Oil pressure of 150 kPa (20 lbf/in2) must show at the oil inlet within 3 - 4 seconds of engine firing to prevent damage to turbocharger bearing system. A flexible supply pipe is recommended.

      13. The minimum oil pressure when the engine is on load must be 210 kPa (30 lbf/in2). Maximum permissible operating pressure is 500 kPa (72 lbf/in2) although 600 kPa (88 lbf/in2) is permitted during cold start up. Under idling conditions pressure should not fall below 70 kPa (10 lbf/in2).

      min 10psi @ idle, min 30psi @ load / max 72psi @ load


    8. Member Boost112's Avatar
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      05-23-2010 09:43 PM #8
      anyone running or can give the spool characteristic of a hx40 on a 12valve.... om been keeping an eye out for onw locally and wanted some feed back....tia.....
      --- SPACE FOR RENT---

      Quote Originally Posted by schwartzmagic View Post
      Those VRTs are so full of win :-D

      www.dubcartel.net

    9. 05-30-2010 10:26 PM #9
      Ya I have been looking into doing a holset hx35 on my 12v. They sell brand new off of eBay for 300 bucks, not bad at all
      Haters make me laugh


    10. Forum Sponsor Quintin@USRT's Avatar
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      05-30-2010 10:28 PM #10
      they aren't real holsets on ebay.

    11. Member Daskoupe's Avatar
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      05-31-2010 01:06 AM #11
      i'm looking hard!!!!


      keep this thread alive!
      12.2@116mph-293whp305wtq 22psi stock aba-AC-DD My Jetta
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    12. 05-31-2010 02:54 AM #12
      Quote Originally Posted by Quintin@USRT View Post
      they aren't real holsets on ebay.

      Where can I get a 'real' holset from then?
      Haters make me laugh


    13. Member wabbitGTl's Avatar
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      Six wheel drive twin turbo V10
      05-31-2010 04:19 PM #13
      i picked on up from craigslist for less than $400 for a turbo with less than 10 hours of use. they're out there, you just have to be patient if you want a good deal.

    14. 05-31-2010 07:16 PM #14
      Ya, and they bolt right up to a t3 flange. I heard from someone that you have to weild the waste gate shut in them? Or something like that?
      Haters make me laugh


    15. Member acee_dub's Avatar
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      06-01-2010 12:09 PM #15
      If you have an HX35W (hx35 with internal wastegate) you have to weld the wastegate shut and run external (the stock internal wastegate is 25 psi i believe)

    16. Member Boost112's Avatar
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      06-01-2010 12:11 PM #16
      Anyone running or can give the spool characteristic of a hx40 on a 12valve? please?
      --- SPACE FOR RENT---

      Quote Originally Posted by schwartzmagic View Post
      Those VRTs are so full of win :-D

      www.dubcartel.net

    17. Forum Sponsor Quintin@USRT's Avatar
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      06-01-2010 01:40 PM #17
      Quote Originally Posted by acee_dub View Post
      If you have an HX35W (hx35 with internal wastegate) you have to weld the wastegate shut and run external (the stock internal wastegate is 25 psi i believe)
      low boost....


      the main problem is the port is only on one side of the divided housing and is too small to prevent boost creep.
      Last edited by Quintin@USRT; 06-01-2010 at 01:56 PM.

    18. Member wabbitGTl's Avatar
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      06-01-2010 03:51 PM #18
      Quote Originally Posted by Quintin@USRT View Post
      low boost....


      the main problem is the port is only on one side of the divided housing and is too small to prevent boost creep.
      i'm glad someone chimed in on that. i was hoping the internal would work. guess i'll add a wastegate to my list

    19. Member D3hd3nd's Avatar
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      06-02-2010 12:26 AM #19
      for anyone looking for a hx35 i have one that i was going to go BT with but tickets are keeping me from finishing it... no shaft play, 12cm housing, 8 blades, 300 + paypal fees shipped

      made for external wastegate

    20. Forum Sponsor Quintin@USRT's Avatar
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      06-02-2010 12:36 AM #20
      Quote Originally Posted by D3hd3nd View Post
      for anyone looking for a hx35 i have one that i was going to go BT with but tickets are keeping me from finishing it... no shaft play, 12cm housing, 8 blades, 300 + paypal fees shipped

      made for external wastegate
      pm Daskoupe!!

    21. Member Daskoupe's Avatar
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      06-02-2010 06:23 PM #21
      Thread is getting cleaned up.New chit chat thread being made
      12.2@116mph-293whp305wtq 22psi stock aba-AC-DD My Jetta
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    22. Forum Sponsor Quintin@USRT's Avatar
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      06-02-2010 06:54 PM #22
      What u talking bout Das?? Why?
      Last edited by Quintin@USRT; 06-02-2010 at 08:33 PM.

    23. Senior Member TBT-Syncro's Avatar
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      06-02-2010 07:02 PM #23
      Quote Originally Posted by Quintin@USRT View Post
      Why?
      thats what i was thinking.

      no idea why we need brand specific 'chit chat' threads on here.

    24. Member Dave926's Avatar
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      06-02-2010 07:25 PM #24
      We need an info thread only type of deal, with setups etc to prevent excess questions like "Where do i buy one?" or "What is the spool?"

      Straight info here thats all please

    25. Member Dave926's Avatar
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      06-02-2010 07:28 PM #25
      Summary provided by wiseman, DSM-onster

      HX35:

      The 8blade hx35 has a 56mm compressor inducer. This is found on 1995-1998 cummins manual pickups. The compressor flows 52 lb/min according to the compressor map. The bolton BEP housing (0.55 a/r) is enough to push the limit of the compressor. There's several 500whp 8blade hx35 cars out there with the bolt on housing. It reaches 20+psi by 3500rpms in 3rd with 272 cams. Smaller cams would equal a faster spool speed in most cases.

      The 7blade hx35 has a 56mm compressor inducer. This is found on the 1999-2002 cummins manual pickups. The compressor flows 60lb/min according to the compressor map and logged results from a member here. The bolton BEP housing with the hx35 turbine wheel do not SEAM to have enough flow to really reach the potential of 60lb/min. But many have logged over 50lb/min so far and seen 500whp. The stock hx35 12cm^2 twinscroll turbine housing is a t3 flange housing. This mated to a NON-divided runner manifold has produced a 132mph trap speed with a full weight 1g AWD. This is about 600whp. So the flow is there with the stock housing if you use a non-divided manifold. The spool speed of the 7blade hx35 is similar to the 8blade hx35 with 20+ psi by 3500rpms in the bolton housing and by 4000rpms with the stock housing with a non-divided manifold.

      HY35:

      The hy35 has a smaller turbine wheel than the hx35. And, it has a turbine housing connection that does not allow for a bolton housing to be used. It does not have a divided housing so any t3 manifold can be used effectively with this turbo. It has the same compressor as the 7blade hx35. We don't know if te hy35 turbine wheel and housing is enough to reache the 60lb/min potential of the 56mm 7blade compressor. Some one try it out already!!! It should at least be a faster spooling viable option to the full t3/t4 50-trim.

      H1C/WH1C:

      In 1994, there was the Wh1c which has pretty much the identical compressor as the hx35 but with a Vband compressor cover. The turbine wheel is the same. It will bolt into the BEP bolton hx35 turbine housing. It has 4 bolts at the housing instead of 6. So you will need to buy 2 more bolts and use 6 washers cut to make a flat side. Honestly, I just used bolts that were cut a little short and the bolt head was wide enough to pull the chra to the turbine housing. No sealing issues. Since the Wh1c is for all practical purposes an 8blade hx35 the spool and flow is the same too.

      I have the big h1c. It comes on the INTERCOOLED 1991-1993 cummins pickups. It has the webbing for MWE but no groove cut like the hx35/wh1c has. This turbo I term the big h1c because it has a 54mm compressor inducer and same exducer than the 8blade hx35/Wh1c. The other h1c is the small h1c found on the NON-intercooled cummins pickups. This has a 50mm inducer but only 7blades and has no webbing for MWE. Less blades helps flow, but so does a larger inducer diameter. The most whp ever recorded on a gas 4cylinder with the small h1c was done on a KA24 nissan: 411whp. Since the big h1c has a 4mm larger inducer and the same turbine wheel as the hx35, it is safe to say that it flows enough for between 411whp and 500whp. The diesel sources state that it flows SLIGHTLY less than the early hx35. So 4lb/min less than the 8blade hx35 puts the flow of the big h1c at 48-49lb/min right where a 50-trim or 20g is. The small bep housing is all that's needed to get the most from the compressor and the spool speed is 20+psi by 3500rpms.

      HX35-40 hybrid:

      Keeping the long tradition of the marriage of sportcompact and hybrid turbos, there is the hx35 turbine and the hx40 compressor. It is strongly recommended to use the large bep turbine housing or the stock hx35 turbine housing with an non-divided t3 manifold for this turbo. The small bep housing around a t31 size hx35 turbine wheel is probably not enough to merit any of the hx40 compressor wheel upgrades. 20+ psi by 4000rpms can be seen in the hx35/40 with the hx35 12cm^2 turbine housing with a non-divided t3 manifold. With the large bep housing, spool times are to be determined. But likely similar.

      HX40:

      The 8blade hx40 has a 58mm inducer and flows about the same as a 60-1 (around 60lb/min) with ALOT better high boost efficiency and spool speed. It is the most common hx40 out there. The small bep housing with the hx40 turbine wheel is plenty to reach the full potential of the 60lb/min 8blade hx40 compressor. 20+ psi by 4100rpms with 272s.

      The 7 and 6 blade hx40 is called the super40 and has the 60mm compressor inducer. This compressor flows around 69lb/min. You can get this wheel in billet style (think HTA). The non-billet wheel spools as fast as the 8blade hx40 in the bolton bep housing and has done 653whp at 40psi per the holset results only thread. Billet should spool even faster. The t3 .70 a/r BEP housing slows spool about 400rpms. But reports show a significant gain in flow per psi. So expect more power at lower boost with that turbine housing.

      H1E/WH1E:

      The Wh1e is like it's little brother the Wh1c. It mirrors the hx40 8blade in every way except that it has a v-band compressor cover and a 4bolt chra-turbinehousing pattern. It will consequently bolt into the hx40 bep bolton turbine housing and this is plenty of flow to max out its 60lb/min compressor.

      The h1e is like it's little brother the h1c. There are different size compressors. . . BUT there are also different size turbine wheels too. Check measurements before buying this turbo if you plan on running a BEP turbine housing. There are lower flowing compressors than the 58mm 8blade that are out there. So this turbo may not flow any more than an hx35 if get the wrong one. You need at least a 58mm compressor inducer for this to be a worthwhile turbo vs the proven hx35 or 8blade hx40.

      HX52:

      This is a big sucker. It is commonly found on the Volvo Semis and usually has a billet compressor wheel. It flows 88lb/min. There is no bolt on housing for it. If you want a bolton housing for this turbo, then you don't want this turbo. In fact if you want a t3 flange turbine housing for this turbo, then you don't want this turbo. You DO want this turbo if you're looking at a gt4294r or gt4202r. The turbine inlet is slightly different than a t4 bolt pattern. You can still get the t4 manifold to work just fine by enlarging the bolt holes.

      Misc.:

      * Holset's don't spool slow. They spool faster than their garrett or mitsubishi counterparts. Diesel exhaust is cold and slow moving.

      * The holset turbine wheel is a work of art. It has been shown to flow very well in a very small turbine housing. For example the hx40 turbine wheel in the small .55 ar bep bolton housing flows as much as a garrett gt35r turbine wheel in a larger .63 ar garrett t3 turbine housing. The hx40 with this configuration spools about 500rpms faster! You can upgrade to the .70 a/r BEP t3 turbine housing and have the same or slightly faster spool speed as the above gt35r with ALOT more flow per psi and consequently more horsepower per psi. This makes for VERY good pumpgas numbers.

      * Holset patented map width enhancement. They do not have extended tip technology, but there compressors show more efficiency than their garrett or mitsubishi counterpart.

      * They have superback technology witch leads to VERY, VERY durable compressors. The are designed to be overworked and underpaid.

      * There are discrepancies all over the web concerning the compressor maps. Take what you hear/read with a grain of salt and a shot of tequila, and the worm.

      * The holset is fine with stock 4g63 oil pressure from the oil filter housing. If you have no b shafts, you'll need a restrictor. The drain line is a garret bolt pattern. The feed line is different for different turbos.

      wiseman, DSM-onster via dsmtuners.com

      Straight from the holset hx repair manual .pdf:

      8. Normal oil temperature is 95+/-5°C (203+/-9° F). It should not exceed 120°C (248°F) under any operating condition.

      9. Any pre-lube oil must be clean and meet the minimum CD classification.

      10. The orientation of turbine housing, bearing housing and compressor cover is fixed according to application. During installation, do not attempt to rotate these components. Inclined turbocharger installation is not recommended. If an installed angle is necessary, oil inlet centreline must be +/- 10 degrees from vertical and rotor centreline +/- 5 degrees from horizontal.

      11. Holset permits oil return pipes to decline at an overall angle of not less than 30 degrees below horizontal.All turbocharger applications require a pipe of internal diameter greater than 19 mm which has integrated connectors. To ensure oil returns into the engine under all operating conditions, the return connection into the engine sump must not be submerged and the outlet flange of the turbocharger must be 50 mm above the maximum oil level of the engine sump pan. Crankcase pressure should be limited ideally to 0.8 kPa (0.12 lbf/in2) but 1.4 kPa (0.20 lbf/in2) can be accepted by reference to Holset.

      12. Oil pressure of 150 kPa (20 lbf/in2) must show at the oil inlet within 3 - 4 seconds of engine firing to prevent damage to turbocharger bearing system. A flexible supply pipe is recommended.

      13. The minimum oil pressure when the engine is on load must be 210 kPa (30 lbf/in2). Maximum permissible operating pressure is 500 kPa (72 lbf/in2) although 600 kPa (88 lbf/in2) is permitted during cold start up. Under idling conditions pressure should not fall below 70 kPa (10 lbf/in2).

      14. Recommended oil flows for the turbochargers are 2 litre/min at idle and 3 litre/min above maximum torque speed.


      Oil feed for Holsets are m12 x 1.5. I would suggest the use of either a copper washer or an o-ring like the stock feed

      Places to purchase the oil feed adapter:
      http://www.extremepsi.com/store/cust...at=1007&page=2
      http://www.summitracing.com/parts/EAR-9919BFGERL/
      http://www.pegasusautoracing.com/pro...asp?RecID=5054 ------ for a -3an line/adapter
      http://www.pegasusautoracing.com/pro...asp?RecID=5055

      Oil drain flange for the holsets is a t3 style flange, though bigger turbos may differ
      Last edited by Dave926; 06-02-2010 at 08:11 PM.

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