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    GTX-GTR and General Turbo information

    TURBO GLOSSARY:



    TURBO CALCULATOR: (for choosing compressor sizes)



    --------------------------------------------------------------------------------------------------------

    EXCELLENT SITES

    Compressor maps and theory


    VF10/8/12 Hybrid How-to


    GTX-GTR Engine and Turbo Differences


    --------------------------------------------------------------------------------------------------------

    RHB5 FAMILY TURBO INFORMATION

    from Mazda323performance

    VJ-6 Very early '85 - '86 BFMR Japanese Imports
    VJ-12 Early '86 BFMR Japanese Imports
    VJ-13 '86 - '87 BFMR Japanese Imports
    VJ-14 American BF Model 323GTX (flows 200 cfm)
    These are all about the same size. Only differences are the water lines?

    VJ-16 Upgrade turbo available in the US
    VJ-17 Group A turbo used in the WRC (no wastegate, external wastegate)
    I believe these are both about the same size(larger/freer flowing wheels than the VJ14?). Good for 17psi on a 1.6L
    Also heard they have larger bearings?

    Smaller to bigger:
    VJ20 - BPT turbo, sounds about the same size as the VJ16 or 17, good for 15psi on a 1.8L
    VJ11 - MX6/626/Probe

    VF10 - Subaru Legacy, VF10 is bigger than the VJ11, VF8 is bigger
    VF11- automatic Subaru Legacy, same as t-bird comp?
    Warner-Ishi T-bird (flows 381 cfm)
    VF8 - Liberty RS (larger turbine housing and wheel?)

    VJ23 - 323GTR, BHF6, ball bearing, still kinda laggy, someone's making 400hp with one of these

    Hybrids I knows, (coldside/hotside) or (compressor/turbine)...
    VJ11/14 - Most popular here in the states, spools up 500rpm quicker than stock, cooler intake temps (for larger comp), I've heard it will do 20psi and 19 till redline
    VF10/VJ14 - A little bigger, lags slightly more than stock?
    VF8/VJ14 - More lag than stock
    VF8/VJ11 - Big dog, 300hp turbo; comparable to a T3?

    T-Bird comp/VJ16 turbine (sounds kinda like a VJ20 with a VF10 comp?), Kenny Lew runs this turbo, slightly laggier than stock?

    WRX/VJ14 - Matt Manspeaker(yahoo lister) said it was good for 20psi, but he mentioned ball bearings? TDO4 isn't bb?? Maybe he has a new IHI turbo?

    Garrett GT/VJ14 - Corksport lists this on their site... I've heard of people using these in Australia and NZ. And yes, I'm 99.9% sure that a GT25/28 will not bolt up to a stock manifold.

    Turbine Housings:
    Don't know if it refers to a/r or trim?? But it's cast into the side of the housing.
    Smaller to bigger:
    VJ14/16/17 = 12r (VJ16/17 have freer flowing wheels?)
    VJ11?/VJ20/VF10/VF11 = 15r, larger wastegate port? (*note*: the VJ20 does have a larger, octogon-shaped inlet)
    VF8 = 20r
    VJ23 = ??

    VF11 Turbo Specs:
    Inlet Diameter: 2"
    Outlet Diameter: 1.75"
    Air Flow Rate: 1.4 - 10.8m3/min or 49.4 - 381.4ft3/min
    Max Pressure Ratio: 2.8
    Maximum Speed: 18540rpm
    Compressor: 0.4 A/R, 37mm trim
    Turbine: 0.52 A/R, 40mm trim
    Misc Numbers:
    Turbo Spec. VF 119006
    Serial No. RHB5 14055W
    Parts No. 14412AA070

    Warner-ISHI RHB5 (T-bird turbo) Specs:
    Air Flow Rate: 1.4 - 10.8m3/min // 49.4 - 381.4ft3/min
    Max Pressure Ratio: 2.8
    Maximum Speed: 180 x10^3rpm
    Max Allowable Gas Temp: 950 oC // 1742 oF
    Diesel Engine Application: 54-154Ps
    Gasoline Engine Application: 73-208Ps
    Flow:381 CFM

    Resource
    http://www.robietherobot.com/storm/g...mods_turbo.htm (I think this info is on the Ishi-Warner t-bird turbo and not the VJ11)
    http://www.mx6.com/forums/forumdispl...?s=&forumid=61 (MX6 forum)
    http://www.fordlaser.com/forum/viewt...er=asc&start=0 (good IHI info)

    I calculated the max flow of the VJ20 to be 350cfm. This is based on it being able to hold 12psi at 7000rpm on the 1.8 GTX motor. This is based on my observations as well as what I have heard from other GTX owners.

    It is worthwhile to note that in order to hold 15 psi on the 1.8 litre motor to 7000rpm a turbo needs to flow 385cfm.

    As shown below, the VF10/VF11 hybrid which is the easiest turbo upgrade for our cars can supply 381 CFM. It is a mild upgrade but it will hold that 15psi to redline and will hold 17 psi to 6500rpm. Overall it will give a good midrange and topend gain over the VJ20 and can be used with stock GTX engine management (Although at its very limits)

    --------------------------------------------------------------------------------------------------------

    How to calculate CFM requirements for an engine

    For a forced induction engine:

    CFM = CID*RPM/3456*(Volumetric efficiency)*(boost%/100 above atmospheric+1)

    where

    CID = cubic centimeters (cc) * 0.06102
    Volumetric efficiency is assume 0.85
    Boost --> if you are running 14.7 psi of boost you are running 100% above atmospheric pressure
    Last edited by Lex; 12-25-2007, 01:03 PM.

    #2
    Nice info. I heart U.
    BP-05 Turbo-Sold
    2004 MK4 AWP Jetta GLI

    Comment


      #3
      Originally posted by elscotto80
      Nice info. I heart U.
      X2
      The T3 BP MX-3 conversion has begun, and is taking forever & will kill me.

      Comment


        #4
        Originally posted by Lex
        Warner-ISHI RHB5 (T-bird turbo) Specs:
        Air Flow Rate: 1.4 - 10.8m3/min // 49.4 - 381.4ft3/min
        Max Pressure Ratio: 2.8
        Maximum Speed: 180 x10^3rpm
        Max Allowable Gas Temp: 9500C // 1742oF
        Diesel Engine Application: 54-154Ps
        Gasoline Engine Application: 73-208Ps
        Flow:381 CFM
        That should be 950 oC, not 9500. lol
        9500 C is ~17000 F.

        Originally posted by Lex
        http://cgi.ebay.com/ebaymotors/ws/eB...tem=2447679072 (I'm ashamed to call this one a resource but it's where I got the VF10 info from, might be t-bird info?)
        Above link is dead.

        Good info though!

        Comment


          #5
          Originally posted by Intruder
          That should be 950 oC, not 9500. lol
          9500 C is ~17000 F.


          Above link is dead.

          Good info though!

          Fixed and removed old link
          I think that we could use some more turbo-specific information on here. I will add more relevant info as I come accross it. Any contribution is welcome

          Comment


            #6
            stickied - its good to see posts like this in the FI section.
            The T3 BP MX-3 conversion has begun, and is taking forever & will kill me.

            Comment


              #7
              Updated - the links at the top are well worth the read and look

              Comment


                #8
                a nice link:



                All the good info on hybrids and adds a couple things about VF10 and VF8 and VF12


                Mexican: "You wanna race for titles?"
                Mormon: "lol, no, I don't want your car."

                Comment


                  #9
                  just wanted to make a correction, the VJ-11 has a 20r ,
                  "Discontent is the first necessity of progress."
                  -Thomas A. Edison

                  "There is a fine line between ballin' on a budget, and dreamin' on an empty wallet."


                  *Junked* 92 mx3, BP swap- milage whore, beaten up and down the east coast
                  *Junked* KLZE powered 323 on Megasquirt 1
                  172.60HP & 156.93 TQ with only headers and short ram intake. back under the knife for a BPT swap.
                  New Daily stock 1.6L 1999 Mazda Protege LX

                  Comment


                    #10
                    hmm, you sure about that one?

                    Comment


                      #11
                      I checked the housing when i was trying to see if it would work with the VF10.


                      but it would make sense, since a 2.2L will flow more exhaust than a 1.8, which had the 15r.

                      I got a pic at home of the numbers on the housing, maybe im reading them wrong, Ill post it tonight after work

                      \EDIT: found
                      Attached Files
                      Last edited by MD323; 02-24-2006, 03:44 PM.
                      "Discontent is the first necessity of progress."
                      -Thomas A. Edison

                      "There is a fine line between ballin' on a budget, and dreamin' on an empty wallet."


                      *Junked* 92 mx3, BP swap- milage whore, beaten up and down the east coast
                      *Junked* KLZE powered 323 on Megasquirt 1
                      172.60HP & 156.93 TQ with only headers and short ram intake. back under the knife for a BPT swap.
                      New Daily stock 1.6L 1999 Mazda Protege LX

                      Comment


                        #12
                        So if i am reading that correctly it is a 20R correct?
                        "Discontent is the first necessity of progress."
                        -Thomas A. Edison

                        "There is a fine line between ballin' on a budget, and dreamin' on an empty wallet."


                        *Junked* 92 mx3, BP swap- milage whore, beaten up and down the east coast
                        *Junked* KLZE powered 323 on Megasquirt 1
                        172.60HP & 156.93 TQ with only headers and short ram intake. back under the knife for a BPT swap.
                        New Daily stock 1.6L 1999 Mazda Protege LX

                        Comment


                          #13
                          The VJ11 is a 15R - Im not sure about that picture but it seems you're reading it correctly. Compare the size to your VF10. If the exhaust wheel is larger than your VF10, it is a 20R because the VF10 is a 15R.

                          Comment


                            #14
                            im curious if the VJ11 has a larger compressor wheel or not. Is the VJ11 exhaust housing larger then the VJ20's?
                            ---Has ClubProtege helped you in someway? show your support by Contributing--- Click Here---

                            1992- project FE3..... 313 WHP @ 9.3psi




                            I pet my dash when I get into the car..."good car"
                            he actually has a mazda tree, parts grow on it

                            Comment


                              #15
                              Originally posted by bpt323
                              im curious if the VJ11 has a larger compressor wheel or not. Is the VJ11 exhaust housing larger then the VJ20's?

                              the compessor wheel is 52mm

                              the waste gate is 11mm

                              and as soon as i can get the bolt of the exhaust housing ill get the exhaust wheel measurement

                              I <3 Calipers
                              "Discontent is the first necessity of progress."
                              -Thomas A. Edison

                              "There is a fine line between ballin' on a budget, and dreamin' on an empty wallet."


                              *Junked* 92 mx3, BP swap- milage whore, beaten up and down the east coast
                              *Junked* KLZE powered 323 on Megasquirt 1
                              172.60HP & 156.93 TQ with only headers and short ram intake. back under the knife for a BPT swap.
                              New Daily stock 1.6L 1999 Mazda Protege LX

                              Comment

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