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Holset Turbos, PART 9

Posted by Morphius, May 15, 2012

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  1. JusMX141

    JusMX141 Moderator

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    Holset billet and cast HX40 wheels are identical in shape and design...the billet is made only to be stronger against wear and breakage in extremely dirty conditions or under very high boost levels. In other words, the durability means it could be machined thinner, but Holset kept the wheels the same size and shape for consistency.

    Because billet is more dense with less air pockets in the material than cast, it's likely the the billet HX40 wheel is actually heavier than the cast wheel of identical size; but the weight gain is so minimal on a turbo of that size that you'd never notice a difference in back-to-back testing.
     

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    1998 Mitsubishi Eclipse GST
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  2. forcefed86

    forcefed86 Proven Member

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    Yes, heaven forbid you read something. :rolleyes:

    Your probably blowing the gate open because of the retarded amounts of back pressure on a bolt on housing at 30ish psi. Get a stronger WG spring.
     
  3. Archer Fabrications

    Archer Fabrications Supporting Vendor

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    Ya thats what i said.
    Also switching to t3 in 3 weeks
     

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  4. Archer Fabrications

    Archer Fabrications Supporting Vendor

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    ImageUploadedByTapatalk1363036052.003715.jpg
    Got one piece of the puzzle.
    ImageUploadedByTapatalk1363036081.957707.jpg
    ^ the other is in the works thanks to cory (eviltsi) at STM!
     
    Last edited by a moderator: Jul 10, 2014

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  5. 1glaserfwd

    1glaserfwd Proven Member

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    Just got my 1g finished up and partially broken in via the motoman method. Took a short video clip through 3rd gear and on only 14psi this thing moves good! Gonna be straight banannas at 35psi!! Cant wait to snag my 2150s and hit the dyno, then the track shortly after! This is on a 2.3 also, spool on the .70 t3 is great!

    https://www.youtube.com/watch?v=IZ67fgIZvxA
     

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  6. D00kie

    D00kie Proven Member

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    So.... where can optional t3 exhaust housing be purchased at? LOL
     
  7. Archer Fabrications

    Archer Fabrications Supporting Vendor

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    Optional? The BEP? Get it from extreme psi or bep
     

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  8. D00kie

    D00kie Proven Member

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    Yea, and it would have to be t3 flanged with vband. Im picking up a brand spanking new H1E for a steal, but it has the t4 twinscroll housing on it
     
  9. Archer Fabrications

    Archer Fabrications Supporting Vendor

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    Yeah it's t3 and has 3" vband, it MIGHT fit one of those, i havent done my reading on the h1 holsets but go to extremepsi they have them.
     

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  10. D00kie

    D00kie Proven Member

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    Ill have to get the housing machined to fit
     
  11. WES_393

    WES_393 DSM Wiseman

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    Before buying, I would at least pull the compressor cover (just remove the v-band clamp) measure the inducer. You want at least 58mm, but 60mm would be best. If it's something like 52mm then I wouldn't even bother.

    And turbine housing will likely need to be swapped regardless. The H1E normally didn't use a wastegate, just a massive housing instead. Some even came as large even 22cm^2. Not very 4-banger friendly.

    If the turbine is 64mm at the exducer, then it will fit HX40 housings such as the BEP options.
     
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  12. Archer Fabrications

    Archer Fabrications Supporting Vendor

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    If he needs vband chra clamp the bep housings won't work
     

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  13. WES_393

    WES_393 DSM Wiseman

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    The compressor is what attaches with a v-band clamp. The turbine housing is held on with plates and bolts just like the BEP housings.
     
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  14. D00kie

    D00kie Proven Member

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    I'll be sure to do that!!!!

    Here's a pic of the #'s on the housing: 3527107 /H1E
    PART_1363734959544_2_zps6bea19e3.gif
    PART_1363781133358_2_zpsd4c84d33.gif
    PART_1363735005069_2_zpsaa3d36ac.gif

    Now if I read correctly, this may me the 62mm? I've read so much I may just have crap mixed up LOL
     
  15. JusMX141

    JusMX141 Moderator

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    Should use a 3599642 compressor wheel according to the parts list, which would be a 54/83mm wheel, similar to the H1C.

    In other words, a total dud. A HX35 compressor would make more airflow. You may want to get the compressor specs from the seller just to be sure, however....doesn't take 3 minutes to remove the cover.
     

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  16. D00kie

    D00kie Proven Member

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    Well dang, he accepted my offer of 200, thats why i figured that maybe i could make something work of it for a future build..... my sc61 is no where near maxed out on my current setup
     
  17. Archer Fabrications

    Archer Fabrications Supporting Vendor

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    I like my hx40 way more than my old scm6152
     

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  18. JusMX141

    JusMX141 Moderator

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    Any of the available HX40's in a BEP bolt-on housing will outspool and outflow a SCM6152E.

    Trouble is, you didn't get a HX40- you got a H1E which has many different compressors...some being less-potent than a 7-blade HX35.
     

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  19. Archer Fabrications

    Archer Fabrications Supporting Vendor

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    For those of you with hx40's how high are you guys revving? I am gonna build my head someday and havent reved past 7500 on 30psi on stock springs and head. Bc272's when does the hx40 run out of steam? Or is that question boost relevent. I plan on 36-40psi max for track days.
     

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  20. JusMX141

    JusMX141 Moderator

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    Ummm....never? This isn't a 16G, my friend. :D
     

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  21. Archer Fabrications

    Archer Fabrications Supporting Vendor

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    Well what are you and dave running to? This turbo really would be fine at 11k? It doesnt feel as fast to me doing highway pulls to 7500 LOL maybe it's the stock intake manifold and bolt on crap.
     

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  22. LandSpeed-DSM

    LandSpeed-DSM Proven Member

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    Atmosphere, displacement, boost and your combinations VE determines where the end of your rev range occurs.

    You may have enough cam to run out another 1000+ rpm, but your intake and bolt on housing will cause you to choke earlier.
     

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  23. Archer Fabrications

    Archer Fabrications Supporting Vendor

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    Okay so for me personally.
    Altitude-sea level
    Boost-36
    VE-108
     
    Last edited: Mar 26, 2013

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  24. LandSpeed-DSM

    LandSpeed-DSM Proven Member

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    The VE I am talking about is not determined by a cell in your mis-calibrated SD table.. 108 is a value you are using to reach a target AFR.

    A very rough way of determining your VE is to take your dyno plot, find peak torque and treat that as 100% VE. Then on either side of peak, every 250 or 500rpm take that value and divide it by peak torque and you'll get a percentage <100%.

    You use that to make engine demand lines on the compressor map like this:
    4ac341ed9a9e76f46d95767f26f2340d6g.jpg

    fb9b862500309c1a67b4ce1d53d17a8b6g.jpg

    *These were done for a 1.8L, with a cylinder head 15-20 years newer than ours. Some assumptions I think were made about the cam or a cam choice on the plot that goes to 9k.. but its the whole point of a bigger lift/duration cam to shift the higher VE section of the rev range later on.

    It will give you a ball park estimate of what to expect. Notice how those lines have different slopes? That is because VE for each is different, and then displacement is being effectively multiple by PR, which is not wholly accurate but plotting it out as charge density times displacement would take a considerable bit of time and this is nearly the same.
     
    Last edited by a moderator: Jul 10, 2014

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  25. 92 GSR-4

    92 GSR-4 Supporting VIP

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    I've been reading a lot of Holset threads and can't confirm this. I'm sure it'll be an easy reference for someone here.

    Can the FP30 turbine housing be machined and mated to an HX-40? My current plan is to swap my FP3052 with something bigger and if I can mate the HX-40 to my spare FP turbine then I might be able to have the HX as a bolt-on affair. Hopefully my FAL fans and FP manifold play nice.
     

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