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Some info on Holset turbos...

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  • Some info on Holset turbos...

    Still in the process of shopping for a new turbo, I found this info about the Holset Hx-35/40 hybrid( I also found compressor maps for the Hx-40's if anyone's interested)...

    Compressor
    2.362 inducer
    3.328 exducer

    Turbine
    2.753 inducer
    2.364 exducer

    Here is the specs on a straight Hx-40...

    HX-40

    Compressor
    2.362 inducer
    3.328 exducer

    Turbine
    2.995 inducer
    2.480 exducer

    Here are some specs from a Precision Sc6152 rated at 630hp...

    Compressor
    2.416"ind.
    3.227"exd.

    T350 Turbine (Stg 5)
    2.920"ind.
    2.420"exd.

    Basically, the compressor is slightly bigger than a 60-1 but slightly smaller than the 61mm (gt35,t-61,sc61 etc.) but of course includes the Map width enhancement grooves in the compressor wheel supposedly making it about 10% more efficient than a compressor of similiar size. The Hx-35 turbine wheel is bigger than a stg 3 wheel but smaller than a stg 5, I guess a perfect stg "4" if there ever was such. The Hx-40 turbine wheel is bigger than a stg 5, and also slightly bigger than a p-trim.

    Basically with all this being known, I would say the Hx-35/40 is a very attractive alternative to the 60-1, gt35 family, or anything else that uses the 61mm compressor. I would probably rate it's max potential between 620-660hp. The Hx-40 on the other hand I'm now thoroughly convinced it CAN achieve up to 700hp, but nothing more.

    Basically...I've pretty much made up my mind that an Hx-35/40 hybrid is going to be my next turbo Pretty sweet considering they go for $799 brand new.

    Oh yeah...I hope this actually potentially helped somebody :lol:
    Precision Pt-6176
    Tubular turbo manifold
    Z32TT Pump
    450cc DSM injectors
    MGP intake
    60mm TB
    44mm ext. wastegate
    P&P Heads
    1mm oversize Ferrea valves
    Shneider cams
    3"in/out FMIC
    TurboXS RFL BOV
    3" turbo back
    Adj. cam gears
    E-Fan
    Iridium Plugs & Wires
    Romulator
    Lm-1 Wideband

    Not quite together yet...but progressing

  • #2
    Thanks, this is very useful information for comparison. Please post up the compressor map, I would like to see it. In fact, can you re-post this whole thing in the holset turbo faq thread for archival purposes?

    It does not suprise me that the HX40 is larger than a p trim based just on comparable spoolup RPM, but the HX35 turbine being larger than stage 3 is interesting (though really better matched to the HX35 compressor than a stg3/60-1 is) because spoolup seems to be almost identical between the two.

    Go figure, Holsets are actually Garrett clones at heart anyway.

    Comment


    • #3
      The Hx-40 maps I found were in a thread on the dsmtuner forum. I tried saving them but for some reason they got cut in half...so I'll just post the direct link.


      http://www.dsmtuners.com/forums/showthr ... 083&page=5


      Just look towards the bottom half of the page, there's 3 of them there. One is the 58mm 8 bladed compressor, another is the 7 bladed 60mm, and the other is the 6 bladed 60mm which is the highest flowing wheel.

      Of course, another reason why Holsets are good choices for our cars is the divided turbine housings they have, which of course we have divided manifolds. A natural fit obviously, but that's one reason why they spool so fast. That's another reason why I'm starting to believe the Hx-35/40 hyrbid is one of the best turbos for our car period. It's just almost the perfect street/medium power turbo with the 12cm housing.

      Based on the research I've done, (I hope I'm not sounding too fanboyish) but I think it's superior in every way to the 60-1 and the 61mm family.
      Precision Pt-6176
      Tubular turbo manifold
      Z32TT Pump
      450cc DSM injectors
      MGP intake
      60mm TB
      44mm ext. wastegate
      P&P Heads
      1mm oversize Ferrea valves
      Shneider cams
      3"in/out FMIC
      TurboXS RFL BOV
      3" turbo back
      Adj. cam gears
      E-Fan
      Iridium Plugs & Wires
      Romulator
      Lm-1 Wideband

      Not quite together yet...but progressing

      Comment


      • #4
        Also while on the topic, Hx-35's have two different compressor wheels...a 54mm and a 56mm. The smaller of the two probably flows slightly less than a 60-1 but the 56mm is either on par or slightly more efficient than the 60-1. The turbine wheels are all the same size, which is again roughly about a stg "4" i guess we could say. Pretty much this just reaffirms the fact that Hx-35's in either trim are cheaper and better alternatives to 60-1's.

        As far as H1e's and WH1e's go...like the Hx40's that came after them, they also used the 58mm 8 bladed wheel, and the 60mm 7 bladed wheel. The H1e family also used the same turbines as the Hx-40, but also used many more sizes as well, plus they had many different turbine housing configurations. The most notable difference between the H1e family and the Hx-40's is the H1e's lack of map width enhancement, supposedly making them about 10% less efficient. The easiest way to look at an H1e is like a full T4 60-1. They all are t4 flanged with relatively large turbine housings and turbines, and run compressors very similiar to 60-1's. Your average H1e has a smaller, less efficient compressor than an Hx-40, but in most cases a larger turbine and turbine housing.

        Another thing I've discovered is that it's not too hard to make a holset hybrid. Pretty much most Holsets from the H1c's and up have a 4 bolt pattern that connects from the turbine housing to the center section, meaning it's cake to swap to another (ie smaller) turbine housing. Also, after speaking with a few reputable diesel shops, most of the turbine wheels are very to swap onto other turbos. Why nobody has really explored making hybrids out of Holsets is weird, but it's not as hard as others have made it out to be. Pretty much any turbine and turbine housing from the H1c's to the H1e's and Hx35's to the Hx-40's can be interchanged. As far as the larger framed Holsets like the Hx-50's and up, I'm not sure on those yet...but everything else goes.
        Precision Pt-6176
        Tubular turbo manifold
        Z32TT Pump
        450cc DSM injectors
        MGP intake
        60mm TB
        44mm ext. wastegate
        P&P Heads
        1mm oversize Ferrea valves
        Shneider cams
        3"in/out FMIC
        TurboXS RFL BOV
        3" turbo back
        Adj. cam gears
        E-Fan
        Iridium Plugs & Wires
        Romulator
        Lm-1 Wideband

        Not quite together yet...but progressing

        Comment


        • #5
          great info im looking to grab a holset when i get the money.
          1986 Current build
          HX35/40 60mm wheel,480cc injectors,nistune, spearco 2-221,6 puck,walbro fp,solid cross and diff,jason motor mounts,poly everywhere else.

          Comment


          • #6
            Yep, i am using a turbine housing off of a WH1C on my hx35. It is the same size (12cm) but has the mounts for the internal wastegate on it, instead of on the compressor housing like the HX35 that I got (wouldn't work once I clocked it).

            440whp on pump fuel and the STOCK MAF

            Comment


            • #7
              Here are some more compressor sizes for various holsets...

              H1c- 45.8mm 49.7mm 53.9mm

              H1e- 48mm, 52mm, 53.9mm, 56mm, 58mm, 60mm, 63mm (yes they made a 63mm compressor!! p/n-3599642)

              Hx-35- 50mm, 53.8mm

              Hx-40- 59.9mm

              What's cool is the exducer sizes between most of these various compressors is almost always 83mm
              Precision Pt-6176
              Tubular turbo manifold
              Z32TT Pump
              450cc DSM injectors
              MGP intake
              60mm TB
              44mm ext. wastegate
              P&P Heads
              1mm oversize Ferrea valves
              Shneider cams
              3"in/out FMIC
              TurboXS RFL BOV
              3" turbo back
              Adj. cam gears
              E-Fan
              Iridium Plugs & Wires
              Romulator
              Lm-1 Wideband

              Not quite together yet...but progressing

              Comment


              • #8
                For what its worth, a good friend of mine that owns a turbo shop claims the holset will take much more abuse than a Garrett of similar size and characteristics. He also suggested looking into a S 300 Switzer (Borg Warner). His claim was that the S 300 may be a better fit for the Z31. I have not looked into this, as I have gone the Holset route.

                Comment


                • #9
                  More info, snatch from another board...


                  Model Compressor Turbine
                  Holset H1D 1.85 2.165
                  Holset H1D 1.969 2.165
                  Holset H1D/E 1.969 2.165
                  Holset H1D/E 2.047 2.165
                  Holset H1D/E 2.126 2.165
                  Holset H1C/E 2.126 2.244
                  Holset H1C/E 2.283 2.244
                  Holset H1C/E 2.126 2.362
                  Holset H1E 2.205 2.362
                  Holset H1E 2.283 2.362
                  TS04 2.300 3.304
                  60-1 2.324 3.000
                  Holset H1E 2.362 2.559
                  Holset HX40 2.362 2.559
                  T-61 2.382 3.544
                  62-1 2.441 3.000
                  Holset HX50 2.48 2.835
                  T-64 2.490 3.670
                  T-66 2.580 3.584
                  Holset HX50 2.638 3.031
                  Holset HX55 2.638 3.031
                  T-70 2.720 3.850
                  Holset HX55 2.835 3.031
                  T-72 2.840 4.030
                  T-76 3.020 4.030


                  Turbo CFM Racing HP Daily HP
                  HX35 600 420 330
                  HX40 800 560 440
                  T66 800 560 440
                  B1 900 630 495
                  H2E 1000 700 550
                  HX50 1000 700 550
                  HX55 1050 735 578
                  HT3B 1100 770 605
                  T76 1350 945 743
                  HT60 1400 980 770
                  B2 1500 1050 825
                  HX60 1550 1085 853
                  T88 1450-1750 1015-1225 798-963
                  HT4B 1800 1260 990
                  Big Brother 1900 1330 1045
                  T91 2000 1400 1100
                  HC5A/HX82 2450 1715 1348
                  T100 2600 1820 1430
                  T105 2900 2030 1595
                  Precision Pt-6176
                  Tubular turbo manifold
                  Z32TT Pump
                  450cc DSM injectors
                  MGP intake
                  60mm TB
                  44mm ext. wastegate
                  P&P Heads
                  1mm oversize Ferrea valves
                  Shneider cams
                  3"in/out FMIC
                  TurboXS RFL BOV
                  3" turbo back
                  Adj. cam gears
                  E-Fan
                  Iridium Plugs & Wires
                  Romulator
                  Lm-1 Wideband

                  Not quite together yet...but progressing

                  Comment

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