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Twin scroll hx35 spool results.

Posted by bastarddsm, Aug 8, 2011

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  1. bastarddsm

    bastarddsm Proven Member

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    Mendota, Illinois
    Is there anyone out there besides Mr.Peepers with a true twin scroll HX35 setup? Especially an 8 blade? What does yours spool like?

    I built a real twin scroll manifold, and with a 12cm housing I'm not seeing anywhere near the quoted results. The manifold is completely divided, the internal WG is welded shut, there are not boost or exhaust leaks, and I have a 3" turbo back.

    Starting at 2k, I see 25psi at about 4100, and 35 psi at 5500.

    Mr.Peepers logs are showing 25 at about 3400, on his 7 blade.

    That's a 700rpm difference! Is that the 8 blade larger heavier wheel showing up, or is something wring with my setup?

    If thats all the better its gonna be, I'm tempted to put my 20cm housing back on to gain some flow back.
     

    Showcar Build 5K  1

    1991 Eagle Talon N/T
    9.805 @ 144.00 · 1G DSM
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  2. e85_4g63

    e85_4g63 Proven Member

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    Manheim, Pennsylvania
    Knowing the work you've done in your past with DSM's (yes I actually read and remember people's post's LOL), seems like maybe something is up with your turbo. Post pic's of the manifold maybe? I ASSume the following:

    1&4 and 2&3 are together (divided wise) and your using a decently small runner..
     

    1K  0

    1990 Plymouth Laser RS Turbo
    manual · 1G DSM
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  3. kchaazz

    kchaazz Proven Member

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    From what Ive read, the pipe that the external wastegate hooks to has to be divided internally, from the runners all the way to the wg seat as well, necessitating the use of two pipes and two wastegates- one for 1 and 4, one for 2 and 3, though perhaps the effects of this are negligible :confused:
     

    5K  0

    1993 Plymouth Laser RS Turbo AWD
    manual · 1G DSM
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  4. bastarddsm

    bastarddsm Proven Member

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    Either of you have twin scroll hx35's? Did you read my post?

    The runners are paired right, and its divided all the way to the waist gate. That would in fact make it a true twin scroll. I'm looking for information from people who are using the same setup as peepers and I.
     

    Showcar Build 5K  1

    1991 Eagle Talon N/T
    9.805 @ 144.00 · 1G DSM
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  5. e85_4g63

    e85_4g63 Proven Member

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    Manheim, Pennsylvania
    I read your post. And, I ASSumed a couple simple things. No need to get defensive about it. I'm not doubting your work. Are you sure everything is ok with the turbo and wastegates, for sure? I don't have a twin scroll hx35. I do have a twin scroll T4 PTE 6262 though.
     

    1K  0

    1990 Plymouth Laser RS Turbo
    manual · 1G DSM
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  6. boostdawd

    boostdawd Supporting Member

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    phoenix, Arizona
    I know this is old but did u ever get a better spool out of your twinscroll setup @bastarddsm
     

    Street Build 733  1

    1997 Eagle Talon TSi AWD
    awd · automatic · 2G DSM

    Drag Race Build 4K  10

    1991 Eagle Talon TSi AWD
    manual · 1G DSM
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  7. bastarddsm

    bastarddsm Proven Member

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    Nope, it never wanted to make power for me, so moved on and started running a hy35 on a cast manifold. It blew the t/s hx out of the water for power, and didn't spool that much different.
     

    Showcar Build 5K  1

    1991 Eagle Talon N/T
    9.805 @ 144.00 · 1G DSM
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  8. boostdawd

    boostdawd Supporting Member

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    Damn. I'd hate to invest almost 2k for a t/s setup to not get the results I want. Looking for quick spool and top end power but keeping the hx35. What would u recommend?
     

    Street Build 733  1

    1997 Eagle Talon TSi AWD
    awd · automatic · 2G DSM

    Drag Race Build 4K  10

    1991 Eagle Talon TSi AWD
    manual · 1G DSM
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  9. ErikTande

    ErikTande Proven Member

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    I'm going to install a twin scroll hx35 late this fall (prolly november). I'll post here when it's done.
     

    Street Build 785  1

    1997 Eagle Talon TSi AWD
    awd · manual · 2G DSM

    3K  7

    1990 Mitsubishi Eclipse GSX
    13.2 @ 105 · 1G DSM
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  10. iugrad92turbo

    iugrad92turbo Proven Member

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    Kalamazoo, Michigan
    Great I have a hx35 would love to see how it turns out. But already have a punishment o2 housing recirculated it was cheap but want to go full t3 one day.
     

    6K  4

    1992 Eagle Talon TSi
    awd · manual · 1G DSM
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  11. boostdawd

    boostdawd Supporting Member

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    Hey bastard what kind of setup were u running with that twin? Cams? Type of Fuel? Any logs u may have had?
     

    Street Build 733  1

    1997 Eagle Talon TSi AWD
    awd · automatic · 2G DSM

    Drag Race Build 4K  10

    1991 Eagle Talon TSi AWD
    manual · 1G DSM
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  12. bastarddsm

    bastarddsm Proven Member

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    If I had to make recommendations, Id say run the hx35 in a bep .7 or the holset 12cm housing. I'd suggest a nice short small diameter runner manifold. 1.5" weld els based manifolds are way to big for 95% of us.
    I really think that will spool good enough and have pretty killer top end.

    If your hell bent on the t/s ID suggest a 14 or 16cm housing and a small diam runner manifold. I think the 1.25" weld els are a good size. I think this was one area that makes Mr peelers attempt better than mine. I have huge 1.75" primary's, not by choice, I allready had them.


    What are your expectations? So we can see if it's realistic.
     

    Showcar Build 5K  1

    1991 Eagle Talon N/T
    9.805 @ 144.00 · 1G DSM
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    Kapok6 likes this.
  13. gsxrunning

    gsxrunning Proven Member

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    memphis, Tennessee
    What kind of numbers are you makin on your current setup? I'm thinking about swapping up mine to get into the 9s. I'm running a punishment T3 manifold with a BW 259s and running 10.3-10.5. Thought about just throwing a little shot of gas on it to get me there instead of changing my whole set up.
     

    2K  0

    1990 Mitsubishi Eclipse GSX
    manual · 1G DSM
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  14. bastarddsm

    bastarddsm Proven Member

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    My car is 3300 and routinely trapped 133 on the hy35.
     

    Showcar Build 5K  1

    1991 Eagle Talon N/T
    9.805 @ 144.00 · 1G DSM
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  15. boostdawd

    boostdawd Supporting Member

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    [QUOTE="bastarddsm, post: 153609479,
    What are your expectations? So we can see if it's realistic.[/QUOTE]

    I'm looking for quick spool like that of an e316g and enough airflow to make high 400whp or low 500whp. Currently my talon is stripped with no interior and lightweight. Looking for my first 10 second pass.
     

    Street Build 733  1

    1997 Eagle Talon TSi AWD
    awd · automatic · 2G DSM

    Drag Race Build 4K  10

    1991 Eagle Talon TSi AWD
    manual · 1G DSM
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  16. 19gsx91

    19gsx91 Proven Member

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    Erik, will you be making a video highlighting the details on it? It may prove useful in the future for fellow DSMers?
     

    Street Build 3K  16

    1992 Mitsubishi Eclipse GSX
    292 whp · 264 lb/ft · 1G DSM
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  17. Gstclipse69

    Gstclipse69 Proven Member

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    Columbia, South Carolina
    I had a true twin scroll setup on a 7 blade hx35. Redjack t3 manifold and dual wastegates off the manifold. All supporting mods and all i could get was 30 psi by 5k. This was on a 12cm housing. And that compressor is rated at 56 lbs/min and all I could muster out of it was 51-52 lbs/min.
     

    625  0

    1999 Mitsubishi Eclipse GSX
    · 2G DSM
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  18. diambo4life

    diambo4life Proven Member

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    Why would the response be that terrible for a turbo that size? Yikes.
     

    Drag Race Build 623  1

    1990 Mitsubishi Eclipse GSX
    manual · 1G DSM

    Street Build 4K  25

    1991 Mitsubishi Galant VR-4
    710 whp · 501 lb/ft · Galant VR-4
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  19. Gstclipse69

    Gstclipse69 Proven Member

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    Idk, if someone wants to enlighten me Im all ears. It was on e85, sd, and afr 12 at wot a little leaner on spoolup. When it spooled, it spooled fast. It jumped from 5psi to 35 in a heartbeat. But at about 5k.
     

    625  0

    1999 Mitsubishi Eclipse GSX
    · 2G DSM
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  20. Kapok6

    Kapok6 Proven Member

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    Kapok6

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    1991 Mitsubishi Eclipse GSX
    11.3 @ 130.75 · 1G DSM
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  21. Canadian_CD9A

    Canadian_CD9A Proven Member

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    That test is tilted towards the twin scroll due to the manifold design. For a truly fair test, the single scroll should get a single scroll manifold design. And the A/R is unclear, it says it's the same..?
     
  22. Kapok6

    Kapok6 Proven Member

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    So you think the results would be different if the open setup received the same manifold design as the divided?
     
    Kapok6

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    1991 Mitsubishi Eclipse GSX
    11.3 @ 130.75 · 1G DSM
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  23. Vegas smith

    Vegas smith Proven Member

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    Houston, Texas
    They used a twin-scroll manifold for both the twin-scroll housing and single-scroll housing. He's saying they should have used a single-scroll manifold as well with single-scroll housing.
     

    Street Build 3K  10

    1993 Eagle Talon TSi AWD
    awd · manual · 1G DSM
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  24. DeadlyAKrunna47

    DeadlyAKrunna47 Proven Member

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    Can you share pics of your setup? On my gtx35 i had 34psi at 4300rpm
     

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    1995 Mitsubishi Eclipse GSX
    manual · 2G DSM
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  25. Archer Fabrications

    Archer Fabrications Supporting Vendor

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    In regurds to @bastarddsm saying 1.5" primaries are too big for 95% I'd have to disagree in a way, this also depends on what material thickness your manifold is. I'll agree 1.75" is way way huge unless your running above a 72mm but most all manifold manifacturers use 1.5" sch pipe weld els, now here is the difference, sch10 has a larger ID than sch40 by a couple mm, so although thicker, the sch40 will have more velocity then it's sch10 counterpart of the same design. A lot of the main shops use sch10 because it is cheaper. But the sch40 manifolds seem to perform much better. Just something to think about.
     

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    2006 Evo 9 MR
    awd · manual · Lancer Evolution
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