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VJ-20 Hybrid turbo? IHI T-Bird comp side.

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    VJ-20 Hybrid turbo? IHI T-Bird comp side.

    o.k. i hear that the VF10(subaru) compressor side on a VJ-20 is a good upgrade, but some people say the the VF10 in aust. are different that the u.s. spec models (u.s. spec turbo about the same as VJ-20 comp. side, so im told), so im a little unsure if that would help me any using the u.s. spec VF10 hybrid.?!?!.

    I was looking into this for a few nights now, and have found out that the 1st gen mx-6 and probe gt people are using a T-Bird ihi comp. side on there VJ-11's with good results.

    I was woundering if anyone has done this and if the T-Bird ihi comp. side would match a VJ-20 like it does the VJ-11 .

    Also what's the comparoson between the T-Bird ihi comp. side to the Subby VF10 comp. side .

    thanks ryan
    5 boosted bp cars,why...

    #2
    Ryan,

    Try a search in Mazda323Performance.com Hybrid turbos, and MX-3.com Forums: Turbocharger Balancing, Facts And Misconceptions . Sorry, I'd post what I saved, but I got text only.

    I want to add the T-bird cold side to my VJ-11. But I have'nt bothered pursuing it yet. All I really need to know is if I can use the VJ-11 center section (is it simply a switch of impeller and housing) or does one have to use the T-bird center, impeller and housing with an exchange of the turbine sides instead?

    Just food for thought. I hope the other forum will give insight.

    Later
    J
    Later, Jay

    Comment


      #3
      thanks iv'e been searching mx-6.com,323preformance but not mx-3.com
      thanks ryan
      5 boosted bp cars,why...

      Comment


        #4
        i had a hybird ihi turbo.there is litle power gain but i dont think its good cost as far as HP/$
        http://hometown.aol.com/d2maz/index.html
        )
        91 PROTEGE 4WD BPT RUNNING WOW TRACTION WITH 1.5 BAR(sold)
        97 ECLIPSE GST SPYDER (K&N ,BCS MOD, GREDDY FMIC) new toy(sold)
        99 PASSAT GLX V6 (OEM E spec navi, wife's car)
        2006 JETTA TDI DSG 50 mpg(sold)
        2006 EVO GSR
        FIXING VW's for past 10 years

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          #5
          Yeah I had looked up the T-bird hybrid because I had a VJ-11, but didn't find it to be that big of a gain, and wouldn't waste my time with it. For the cost to get it rebuilt w/ seals, and all, and rebalanced, and get it done right, you could buy another bigger turbo.

          Although If you really wanna do it I have 2 good T-bird RHB5's and would be willing to part with one when I get my t3/t4. It'll be a little bit though. I was gonna get one, but they have deals on ebay for hondas all new with manifold, external wastegate, and t3/t4 turbo.IT's the best deal for me, then i'll sell the manifold for $150-$200. And make out prtetty good, when the cheapest I can find an external wastegate is for $250.


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            #6
            Tweeaks,
            Keep me in mind - I may take an IHI t-bird turbo off your hands. I have yet to assemble my system - probably in spring (its cold and wet here - just like Seattle). Any idea which center section would be required?
            Later, Jay

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              #7
              I'm not really sure. I believe you still use the VJ-11 center. I researched it over on Mx6.com in the 1st gen forced induction forums.....IIRC sicsix6 was the one trying to prove it was a beneficial mod, don't remember though. I know that someone had done the hybrid, then switched the compressor side to a......I wanna say, It was a turbo on some type of exotic car...... and they said that it was a way better mod than the T-bird hybrid. They were also going to switch the exhaust side later on with something quite a bit bigger. Like I said after sourcing all the parts from 2 other turbos, just getting a bigger one allready made just seemed like a better economical choice. I will let you know when I do get rid of the spare though.


              Comment


                #8
                I hear you. It may be more trouble than its worth.

                I know that the VJ-11 is a small turbo, and probably needs help on the turbine side as well. Probably gain efficiency with a better flowing turbine as the backpressure from a VJ-11 could be significant under load at upper rpms, 12psi and above. On ther other hand, a larger compressor and the lower compressed temps above 12psi may offset the VJ-11 turbine choke.

                All about experimentation. I think I'll keep searching around for others that have done this 'hard' work. Ive been told to just toss it for a T3, but I like to be different.
                Later, Jay

                Comment


                  #9
                  with the vj20 hybrid they use the center section and compressor side of the t3 turbo because it converts the vj20 to ball bearing. then you'd need new lines and it will probably max out @ like 300 hp instead of like 220 not worth the $ imo. That was the route i wanted to take for a while. CS wants like ~$1300 for the hybrid setup and you have to send them your vj20. good luck though!
                  00 dakota 4x4
                  90 crx si - ls/vtec

                  Comment


                    #10
                    thanks for replying to my post.
                    thanks agian ryan
                    5 boosted bp cars,why...

                    Comment


                      #11
                      Hi,

                      I'm using VF10 hybrid with my BPT VJ20 ekzos housing. It's plug & play basis.. quite a simple mode.

                      See detail below :

                      - I'm using VF10 intake compressor housing (the turbo) + ekzos compressor & CHRA & plug it into VJ20 ekzos housing.
                      - Slight modification on rerouting the water & the lub line. VF10 lub & water line same as the VJ14 from B6T.
                      - Port the VJ20 internal wastegate from 17mm to 23mm. Dun over bore the internal wastegate becoz the VJ20 wastegate door/bell is about 25mm..it might leak.
                      - Slight creep would happen but it can be reduce by using EBC. (Stock VF10 internal wastegate is about 25mm & the door/bell is about 30mm)
                      - Use back VJ20 actuator valve
                      - You need to do some fuelling.. the engine start to leaning up only at 0.9 bar of boost!
                      - Slight lag... the turbo only kick off only at 3000++RPM

                      The performance is really sweet! More top end power!

                      Good luck

                      Comment


                        #12
                        the hives are you from the U.S. or other.
                        thanks ryan
                        5 boosted bp cars,why...

                        Comment


                          #13
                          hi ryan

                          I'm from Malaysia.

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                            #14
                            I'm bringing this back from the dead as I'm considering putting a T-bird compressor wheel in my VJ20. I took my VJ20 turbo in to be rebuilt and the turbo shop said that the compressor wheel I have is damaged. They said they've got a used VJ11 wheel (from a turbo 1.6L Capri) for $20 or they can get a new compressor wheel for the IHI turbo that was in the '87-'88 T-bird for $80.

                            They said the VJ11 compressor wheel is the same as what's in the VJ20. The T-bird compressor is slightly larger, but I think it's only a couple of mm. As part of the rebuild they were gonna resurface the compressor housing and they said they could machine it out to fit the T-bird wheel. Do you think it's worth it to put in the T-bird compressor wheel?

                            I've read that the US Mazda 323 GTX guys like to do this upgrade on their VJ11 turbo's, but I don't see anyone doing it with the VJ20. I'm guessing it's because if BPT guys are looking for more than the VJ20, they go to a VJ20/VF10 hybrid or a VJ23. This car is going to be a daily driver street car. I'm going to run stock boost (8.8psi) for starters and I don't see my self ever running more than like 13psi as I'm going to keep the GTX injectors and BP26 ECU and I want to keep it very reliable.

                            Are there any downsides to running the T-bird compressor other than the additional cost? Since it's slightly bigger it will reach full boost a little later, but provide more top end power right?
                            Last edited by mathia; 11-21-2007, 05:25 AM.
                            '91 Escort GT

                            Comment


                              #15
                              Hybrid now done

                              VJ-11 impellor is now mated to a T-Bird compressor. Fact: they use the same exhaust side and center.

                              Actually mostly a plug and play effort...simply take the cold side and center section (T-Bird / VJ-17 only) and shove it into the VJ-11 exhaust housing. I now have the benefit of the 20R exhaust housing and the slightly larger A/R of the t-bird compressor.(versus the smaller 15R housing on the VJ-20 and the smaller compressor). Its all about the efficiency under the curve, baby...not just big peak numbers.

                              The machining involved was mating the flange to the BP turbo exhaust manifold outlet (as mentioned; I slotted the housing bolt holes, port matched the entry to octagon shape, and enlarged the waste gate hole...just in case.)

                              This all started because I bought a vj-11 that turned out to be another ebay paper-weight and pencil holder...only usable part was the housing.

                              Should we start a club for ebay-junk-only members? (start a new thread if you think those stories would be good for a laugh)

                              I expect a later boost onset (after 3000 rpm) and an efficient 18 psi all day long. T-Bird hybrid Probe owners brag about the 18psi, so I may as well. I feel 12psi with the better boost flow will be the daily street fun for me.

                              We all know there are alternative set-ups...today I am only passing on what I have researched and created...again I only copied someone else, but putting all the info together was a long adventure (nobody was ever clear about the parts matching). I hope to be boosted this spring 2008.

                              Good luck out there...and Merry Christmas.
                              Later, Jay

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