Results 1 to 7 of 7

Thread: INJECTOR TESTING and FLOW by HorsepowerFreaks using ID 2000cc Injectors

  1. #1
    Join Date
    May 2005
    Location
    Portland, OR
    Posts
    2,116
    My Cars
    2006 530i and 2006 330i

    Thumbs up INJECTOR TESTING and FLOW by HorsepowerFreaks using ID 2000cc Injectors

    There's been some discussion about injectors on these forums so I asked John to take our new ID 2000 injectors along with some other injectors and give a tutorial on injector flow rates and spray patterns as various fuel pressures and engine rpms. At the end he will show you a lower quality injector literally shut off from too much fuel pressure.

    http://www.youtube.com/watch?v=oK2LGTPw2ls



    HorsepowerFreaks.com
    12905 NE Airport Way
    Portland, OR 97230
    (503) 256-5600
    BMW Performance Parts
    Product questions or to purchase - sales@horsepowerfreaks.com

  2. #2
    Join Date
    Oct 2006
    Location
    air, dirt, fire, water
    Posts
    16,646
    My Cars
    95M3 92525iT 78810 95525
    http://www.injectordynamics.com/ID2000.html

    They are setting the standard all right.

  3. #3
    Join Date
    Oct 2010
    Location
    Huntsville, AL
    Posts
    1,873
    My Cars
    95 M3
    John stated the race car runs 60 psi fuel pressure and 30 psi of boost. With a one to one fuel reg, the fuel pressure raises to 90 psi (under boost), but your fuel flow calculations will still be at 60 psid, not 90 psid. Or did I miss something?
    WOT

  4. #4
    Join Date
    Nov 2003
    Location
    Oxford, England
    Posts
    1,005
    My Cars
    E30 325i
    Quote Originally Posted by hsvturbo View Post
    John stated the race car runs 60 psi fuel pressure and 30 psi of boost. With a one to one fuel reg, the fuel pressure raises to 90 psi (under boost), but your fuel flow calculations will still be at 60 psid, not 90 psid. Or did I miss something?
    That is correct.

    Itīs the differential pressure across the injectors that determines the flow rate for a given pulsewidth.
    With great challenges comes great engineering.
    Gunni @ Prodrive
    You know what wins race?
    Integration wins races. Fraking mathematical certainty says it does.

  5. #5
    Join Date
    Sep 2002
    Location
    USA
    Posts
    45,550
    My Cars
    BMWs
    Yeah the PSI flow out of the nozzle will be reflecting the ambient pressure (1 atm + 2 bar) vs 90= 60, not 90 psi

    You can think of it as needing excess pressure over ambient pressure in the manifold to fight the pressure back-flowing into the fuel rail.

    AKA your fuel consumption is off based on your calculations.
    Last edited by 5mall5nail5; 10-29-2011 at 08:20 PM.

  6. #6
    DUDMD's Avatar
    DUDMD is offline BMW Maniac Supporting Vendor
    Join Date
    Aug 2009
    Location
    Kent, WA
    Posts
    6,723
    My Cars
    95-540i/6 98-750iL
    Quote Originally Posted by hsvturbo View Post
    John stated the race car runs 60 psi fuel pressure and 30 psi of boost. With a one to one fuel reg, the fuel pressure raises to 90 psi (under boost), but your fuel flow calculations will still be at 60 psid, not 90 psid. Or did I miss something?
    That's what I was thinking, wouldn't the boost pressure in the intake manifold be acting against fuel coming out of the injector? Thus needing the FPR to bring up the pressure in order to keep the injector flowing the same.
    Performance Tuning and Chips currently available for all: M60B30, M60B40, M62B44, M62B44TU, 07/97+ M73B54 and M73B54TU
    Performance Tuning for 335D and X5 35D M57 engine - optional offroad use EGR/DPF/SCR Removal. Tunes available in stage 1 or stage 2 options.
    EWS Delete for MSS52/MSS54/MSS54HP/MS41/ME7.2/M5.2
    DTC Removal Service for most BMW ecus from 99+ etc: MS42/MS43/ME7.2/ME9/M9+/MSV70/MSV80/MSD80/MSS52/MSS54, including the newer EDC17/MEVD17.
    Virgnize DME service available to unlock DME to sync to another vehicle on EWS3 vehicles 98+. M5.2.1, M7.2, MS42, MS43 and more.
    MSS52/MSS54/MSS54HP tuning is almost done and will be released soon.
    Don't be afraid to ask, worst I can say is no.

    Easiest way to contact me is to send me a message on my facebook page "DUDMD Tuning"

    540i/6 E34 Turbo Build
    750iL Work Log

  7. #7
    Join Date
    Sep 2002
    Location
    USA
    Posts
    45,550
    My Cars
    BMWs
    Quote Originally Posted by DUDMD View Post
    That's what I was thinking, wouldn't the boost pressure in the intake manifold be acting against fuel coming out of the injector? Thus needing the FPR to bring up the pressure in order to keep the injector flowing the same.
    Yup - to inject a true 90 psi into the manifold the car would have to be running 30 psi and have a base pressure of 90 psi. Then the system would run 120 rail pressure, but net 90 psi with 30 psi of environmental pressure.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •