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    1. 06-11-2014 08:51 AM #1
      hello did someone try to fit a pre-turbo nozzle
      what gains can be achieved?

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    3. Member BLSport's Avatar
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      07-10-2014 12:27 PM #2
      I've been successfully utilizing pre/post-compressor injection for some time now.

      Here's a good read about how/why pre-compressor injection works. Although the article was targeted at diesel applications, it's fundamentally applicable to other fuel applications as well.
      VR6T + Pre/Post-Compressor ΔHvap Intercooling =
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    4. 07-28-2014 10:23 PM #3
      thanks

    5. Junior Member AchTTung's Avatar
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      09-08-2014 04:47 PM #4
      I'm looking at that 3D model of the flow thru a turbo and wondering why you wouldn't just inject into the scroll just after the compressor and avoid the impingement all together.

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      09-08-2014 07:35 PM #5
      The concept is that the compressor breaks down droplet size, thereby increasing surface area and rate of evaporation.
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    7. Junior Member AchTTung's Avatar
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      09-09-2014 11:34 AM #6
      You have a picture of your nozzle setup?

      My TT is close to being ready for the dyno and final tune, I need to get my Devils Own kit installed before I do it, which means settling on nozzle locations this week.

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      09-09-2014 01:13 PM #7
      I'm currently injecting pre-compressor with this nozzle holder...




      and post-throttle body like this...

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    9. Junior Member AchTTung's Avatar
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      09-09-2014 01:46 PM #8




      Looks good.

      Final questions. What size nozzle and what PSI are you injecting at pre-turbo?

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      09-09-2014 04:41 PM #9
      Aquamist 0.6 mm nozzle mounted pre-compressor, Be Cooling 7 GPH (@100 PSI) nozzle mounted post-throttle body, 200 PSI injection pump, progressive controller, 50/50 water/methanol mixed by mass (versus volume), injection comes on at 6 PSI boost, and is all in at 21.5 PSI boost.
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    11. 01-04-2015 09:40 PM #10
      Where can i get a nozzle helder like that

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      01-05-2015 12:27 PM #11
      Got mine from Howerton Engineering (here's a link), it's a special-order item.

      Just FYI, this particular holder is designed for Aquamist nozzles (M8 x .75 thread).
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    13. 01-05-2015 03:25 PM #12
      for how long do you use pre-turbo

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      01-05-2015 08:47 PM #13
      I've been injecting water/meth for 9+ years, with the last 4+ years being pre/post-compressor.
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      06-01-2015 09:34 AM #14
      Howden no longer make pre turbo nozzles holders
      Anyone know of another source ?
      Turbo`d GTX4088R 750 bhp + bhp
      DRP gearbox`s, diesel 02M gear sets, R32 rear diffs plus tubular manifolds and many other parts always for sale.

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      08-06-2015 09:38 PM #15
      Quote Originally Posted by Miguel_s# View Post
      hello did someone try to fit a pre-turbo nozzle
      what gains can be achieved?
      In my case the pre-turbo slowed down compressor spool so I took it out.

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      09-15-2015 01:46 PM #16
      For anyone looking for a pre-turbo k03/04 nozzle done right; USRT has you covered:

      http://www.usrallyteam.com/index.php...oducts_id=1943





      - Drew
      type-dRew

    18. Member BLSport's Avatar
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      09-24-2015 12:15 PM #17
      Nice to see USRT bringing this to market, and that "Fitments for larger chargers are under development."
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      09-24-2015 12:42 PM #18
      Quote Originally Posted by arm1tage View Post
      In my case the pre-turbo slowed down compressor spool so I took it out.

      It's my understanding that you would only want the nozzle injecting very near to or at maximum boost. So, spool should not be affected, specifically because you should not be injecting during spool.

      There are way too many benefits to disregard this nozzle position due to spool experience alone.

      On a large frame turbo, this is obviously easier. Pick 1 or 2 psi under your max boost level and set it. On a K03/4, they have such a trail off on top end(which is one of the things this nozzle position will help so much), that you can't set it to max boost and leave it, because the injector will be coming on and off through the gears as the boost trails off. So on a factory turbo, i'd say set it to your lowest max boost setting, that's where mine will be.

      At absolute redline, before the shift(tiptronic) the turbo is on boil about 16-17psi for me, but my max spike(with a MBC dialing it back) is 22psi. So i'll command my pre turbo and post intercooler nozzles on at the same time, around 15psi, so it never falls out of injection while WOT and having it set that high will prevent it from coming on too often within normal pedal positions.

      - Drew
      Last edited by focswagen; 09-24-2015 at 12:48 PM.
      type-dRew

    20. 12-04-2015 11:44 PM #19
      I have a similar set up using usrt"s kit I have it coming on at 17 pounds via hobbs switch. My direct port comes on at 14 pounds and post intercooler is progressive of an aem controller starting at 6 and full spray at 14 pounds.

      Some major life issues have prevented me from running any logs with/without different injectors running.

      Full right up and logs will show up as promised one day

      Sent from my Torque using Tapatalk

    21. 03-13-2017 04:09 PM #20
      Is there any preturbo for the 1.4 Tsi IHI turbo ?

      Sent from my LGLS775 using Tapatalk

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