What you need to know when upgrading your turbo

turbo_cutaway

       It is very important to know the basics of how a turbocharger works as well as what you are trying to achieve before you send your turbo in for upgrading.  The most important concept is to understand is that you want to build a turbo that has a compressor and turbine wheel with very similar flow rates. To achievethis, the compressor and turbine wheels should have measurements that are very close in size. The inducer of the compressor wheel and exducer of the turbine wheel are the measurements you want close in size. turbo measurements2 The inducer is the measurement of the wheel where the air enters, and the exducer is the measurement of where the air exits. Having less blades on the turbine wheel will help increase flow for a turbine shaft that has a limited measurement. A good example is a 20T compressor upgrade that measures 50 mm x 61 mm, but the biggest turbine upgrade available is the tdo4HL turbine which measures 45.6 mm x 52 mm. The tdo4HL turbine is offered in 12 blade from factory, however we can offer it in 11 blade, and I have also seen it offered in 9 blade too. The 50 mm 20T would have surge issues with the small turbine in 12 blade form, but when the 11 or 9 blade are used, the flow rate of the turbine is more closely match to the 50 mm compressor wheel which being a 45.6mm wheel. Turbine clipping offers the same effect as going with less blades, but instead of going with less blades, the blades are trimmed back to all for more air flow to pass by the turbine wheel. It is always better to go with a turbine that is closer in size to the compressor wheel if it is possible, but it is not always possible. When trying to match a turbine wheel to a compressor wheel that you have already chosen and the inducer measurements of the compressor wheel are inbetween the sizes of two different turbine upgrade sizes and you cant decide which one to go with, always go with the bigger turbine shaft. Turbos work better with an oversized turbine shaft than an oversized compressor wheel. A turbo with a bigger turbine exducer measurement will help prevent surge and support the flow of the smaller compressor rather than using a smaller turbine that will choke it. A good example is if your using a 56mm compressor wheel and the turbine choices are a tdo6h 58mm x 67mm and tdo6 55mm x 61mm, then go with the tdo6h turbine, or you could go with a tdo6 turbine that is clipped or has 11 blades instead of 12.

 

77 thoughts on “What you need to know when upgrading your turbo

  1. Jacob

    Hi, do you all offer a 9 blade hl turbine? I want to upgrade my td04 9bs (two of them) to either a 19t or 20t billet compressor wheel.

    Reply
    1. Austin Post author

      We dont have access to the 9 blade tdo4HL turbine, only the 11 blades. I have seen them from Kinugawa (kamak dynamics). They make pretty good parts. their website is but they dont have it on their website. Ill ask them. For the 20ts ill have to use different compressor housings that are designed for a subaru, because the inlets for the 3kgt turbos are so small. Im not sure how well the internal wastegates install to those housings, but i have seen those housing use before. Someone makes an adjustable actuator, so it will work, it may be that kinugawa company. It would be about 1000$ for both including all the parts for both rebuilt, machined, labor.

      Reply
      1. Jacob

        I may just stick with your 19t billet. Id really like to keep my stock compressor housings. Call me a moron. Haha But my goals for this setup is at least 500 awhp at lower boost along with fast spool time. What exactly would you recommend? I know 19ts are easily capable of the power, but would I be better off with 20t?

        Reply
  2. Jacob

    Wait, how well the internal wastegates install up to the STOCK housings or the subaru housings? Im confused.

    Reply
    1. Austin Post author

      I was saying that I don’t know how well the wastegate actuators fit up with the subaru covers. Its $800 to do the billet 19ts with the factory housings, tdo4Hl 11 blade turbines. I can do the cast 19t compressor wheel conversion for 700. I have all the parts in stock to build them. I would probably do the 6 or 11 blade 19ts if you only looking for 500 hp. I have hear the 19ts being good for over 500 hp, but I dont know 3kgts really well so I dont know if that was on pump gas or not.

      Reply
      1. Jacob

        Which would be better for power, the 6 or 11? And 500hp is just my bottom line. There are guys pulling around 600 awhp on pump with the billet wheels.

        Reply
  3. Jacob

    I had another question. I saw in one of your earlier posts that you carry a smaller billet 20t. It looks like it would fit a stock housing with normal machining. Can you do it?

    Reply
    1. Austin Post author

      I can try. The 19ts are cutting it close, basically i have to press a pipe in the turbo inlet for the 19ts, but i also have to machine the pipe down and machine the housings too. The 20t wheels are the 47mm wheels then there is a 20t upgrade which is a 50mm wheel. if you want to go 20t, I would just buy the housings like kinugawa sells on their 19ts, then i would machine them to 20t or 20t upgrade wheels. Im not sure of the extra cost, in some ways it may cost cheaper or about the same because there is so much labor involved in machining the stock housings and pressing pipes in. Ill look up a cost quote, so i can get an idea. I would go with the 6 blade wheels for more power and the 11 blades for faster spool.

      Reply
  4. Jacob

    I know im really pushing you but wouldnt it be possible to just press in a larger pipe to accomodate the largest 20t wheel? There is a guy who somehow manages to fit a similar size wheel in the stock housings. Im only bringing this up because Id like you to do it. Your prices are very competitive. All in all, my desired upgrade would be for you to upgrade my 9b’s to the 11 blade hl turbine and the largest 20t compressor. I hope I dont come off as too demanding or pushy.

    Reply
    1. Austin Post author

      It would be something I havent tried before. Its really close with the pipe i press in now. The walls of the last housing i did had about 1mm of thickeness on each side. There is a chance i could cut deeper in the housing and make it work.

      Reply
  5. Jacob

    Here is a link to a picture of what Im talking about.

    http://www.google.com/imgres?q=dr750+turbo&sa=X&hl=en&gl=US&biw=494&bih=621&tbm=isch&tbnid=b7-CRydRykcB7M:&imgrefurl=http://www.3si.org/forum/f142/did-dr750-compressor-wheel-change-design-508573/&docid=wX5JBXEKoDJYQM&imgurl=http://www.3si.org/forum/attachments/f142/83224d1289438851-did-dr750-compressor-wheel-change-design-dr750-3.jpg&w=947&h=710&ei=m_ueUaakDYba8ATenYC4Aw&zoom=1&ved=1t:3588,r:6,s:0,i:101

    Reply
  6. Jacob

    46.8 mm inducer on the compressor side, is all I could dig up. I do know the turbine side is made of ti-al. Sorry, but that is seriously all I could find out.

    Reply
    1. Austin Post author

      My measurments say 46.02 for the 19ts and 47.04 for the 20ts. Ill take measurments and see what it looks like clearance wise on paper. I know with the last pair i did, one housing i was able to put the whole pipe in, on the other housing i had to machine the pipe down to put it in the housing which makes me have to machine an additional 1mm off the inside of the pipe. You may not know what im talking about though. If you want to send them, im willing to try to do it. Ill go ahead and look into a back up plan incase it doesnt work, ill check and see if i can get aftermarket compressor housing that will work with the internal WG.

      Reply
  7. Jacob

    I get what your saying. So did that last pair of 19ts turn out okay? I mean if DR put in a 46.8mm wheel, it somehow should be right? They arent the only ones either. Midwest turbo told me they could do 20ts. But I dont want to go with either of them as you are the most flexible shop I have found in terms of what I want and the overall cost. I believe in you bro! Haha

    Reply
    1. Jacob

      What all size compressor wheels can you get ahold of? Im actually starting to look at a billet 13g, 15g, 13t, or 16t.

      Reply
        1. Austin Post author

          If they have done the 20ts then I can too, i just wasn’t sure if it was possible. Here are the 19ts i did recently. I used tdo4hL 11 blade turbines. I can get all of the billet wheels you can think of but the 19t(46.2) and 20t(46.8) and 20t upgrade(50mm) are the biggest  photo mms_picture_zpseb6f25c0.jpg” title=”3000 gt 19t turbo upgrade” target=”_blank”>  photo mms_picture_2_zps1468a81d.jpg” title=”3000 gt 19t turbo upgrade” target=”_blank”>

          Reply
        2. Austin Post author

          Im willing to build the 20ts if you want me to. If it has been done before than i can do it too.

          Reply
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  10. Jacob

    Austin, you mentioned kinugawa earlier. Could you source some 9 blade td04hl turbines with a 20t (not the upgrade 20t) build? I know they sell them but I thought maybe you could get a better price seeing as your a vendor. Let me know a final price on a build like that.

    Reply
    1. Austin Post author

      Kinugawa sells a 9 blade tdo4hL turbine for 200 each. Thats the only place that I know of where to get them for now.

      Reply
      1. Jacob

        Hey Austin, how much would you charge for a smaller upgrade from two 9bs? Smaller asin, billet 15g or billet 13gs.

        Reply
        1. Austin Post author

          Its 80$ for machinining each housing, plus the cost of the compressor wheel. I dont have the wheels on hand but i can get them, the wheels are about 75$. so 310 total before shipping. Shipping is 15.3

          Reply
          1. Jacob

            Well my budget is 500. How big can we go with a budget like that? Any turbine upgrades to go with it, while keeping it under budget? Im deifinitely going with your service for my upgrades.

          2. Jacob

            Perhaps a 19t with smaller turbine? 18t? Im trying to go as big as possible within the budget haha.

  11. Captain Crunch

    Heya i’m for the primary time here. I found this board and I in finding It really helpful & it helped me out much. I’m hoping to offer something again and help others like you helped me.

    Reply
  12. Ryan White

    Hello there! I just wish to offer you a huge thumbs up for the great information you have right here on this post. I will be coming back to your site for more soon.

    Reply
  13. Tommy

    Hello how much to upgradeand machine my stock subaru wrx td04l-13t to a td04hl-16t with upgraded thrust? my turbo housings are not damaged.

    Reply
    1. Austin Post author

      Its 450$ converted to the 19t or 20t billet wheels and tdo4HL 11 blade turbine. We dont have upgraded thrust bearing kits for the tdo4 series, we never seen any failures with the tdo4 19ts. I have heard of an upgraded thrust for the bmw 335i turbos but I never heard of them being necessary in previous upgrades like on the 3000 gt vr4.

      Reply
      1. Tommy

        alright, i was interested in the 9 blade turbine td04hl kinugawa sells, and a billet 16T, don”t think i would wanna go 19T. I’m running a 2.2L short block with 8.8:1 compression, and want the benefit of the turbine flow and dont have plans for more than maybe 18ish psi on E85. thanks for the info on the td04 thrust, i wasnt aware.

        Reply
        1. Austin Post author

          Okay. The kinugawa turbine is 200$, so the cost is 550 with that turbine. The 19t(46.5mm) is good for about 320 whp on pump gas, so I always figure that it makes sense to just go all out. I can upgrade it to a 20t(47.5mm), and a 20t upgrade (50mm x 61mm). Ill build whatever you want. Do you want the billet wheel?

          Reply
          1. Tommy

            other than the strenght of the wheel what is the benefit of the billet compressor vs cast?
            does the 9 blade turbine wheel help with flow at high rpm? or is it for the spool time? or does it just do both very well for the price lol? will my stock wastegate actuator perform ok with the 19t or 16t? (still on the fence) thanks for all the answers, you guys are by far the most helpful in explanation.

          2. Austin Post author

            The billet wheels we get are usually extended to grab more air. Some are lighter weight, and they all have a aero designed hub to allow for more airflow. The 9 blade will help a lot of higher rpm power. The biggest down fall of the tdo4 series turbos is that the turbine shaft is limited to 45.6mm. Blouch has gotten 39 lb per min out of a tdo4 turbo upgrade, but im not sure what car that was for, maybe the hundai genesis. Im from the DSM world where those cars start out with 14bs which out flow the tdo4 series turbos. I had a volvo with a tdo4 turbo that I upgraded to a tdo4HL 19t. The 19t made noticeably more power, but I never was able to raise the boost higher than 11 psi, even with the WG disconnected. The reason why, is because factory WGA was so low psi that the exhaust pressure would open the WG @ 11 psi. I think the car had a 5 psi actuator. The 19t was okay but I never got to turn up the boost and see what it would do. Unfortunately, I no longer have the car. For subarus, I have turbo options that are tdo5h 16g and larger, they are good for 350-400 hp. For pump gas Im seeing around 370 from customers. 16g turbos are really the most popular. I can sell you a brand new one for $700.

  14. Tommy

    thank you again! rite now im on a budget, due to my stock engine failing and needing a turbo rebuild. I went with a 2.2L block i had layingaround and freshened it up, and rebuilt my wrx heads, (one new, ouch), i would like the benefit of turbine flow due to the displacement and compression ratio increases. but im not looking to make big power at this time to save my stock 5mt trans with 150k on it lol. so, i have been on the fence with a turbo choice for awhile now, from a td06sl2 7cm 16gtx all the way to a stock rebuilt td04-13t i cant decide haha, if i were to go with a bigger turbo like a 16/18g nature could i run low boost without surge issues? like say 12-14psi?
    otherwise im thinking of going small for now and buy a different big guy later after i have money to fix the transmission the big turbo will shred lol! you have my business tho! youve been excellent in communicating

    Reply
  15. tommy

    im also in need of repairing a mitsubishi starion turbo that was custom built.
    its a td05 with a 19c compressor wheel, unsure of what turbine it has, i know i paid toomuch for it 10 years ago! It has bent fin tips on the compressor side, and broken/worn thrust bearing, I can pull the shaft in and out, but its ok side to side, and doesnt hit the housing. how much you estimate to fix this? i will send you both turbos at once. i also have a small ihi rhb5-vj11x off of an old ford probe that is in good working order, but is blowing some oil, would you repair it is well?

    Reply
    1. Austin Post author

      The 19c, is no problem, i have the parts to fix that on hand. its 190$ and up for the 19c repair with a new compressor wheel, if it needs a new turbine shaft its 60 if it has a tdo5h turbine, 40 for a tdo5 turbine and 100 for a tdo6 turbine or bigger(290 at most). For the IHI, I need to look into that one. I can probably get a rebuild kit for it, I just need to double check.

      Reply
  16. tommy

    I will pull the turbo off the starion and send it out next week! should i send only the center section or do you want the whole thing with housings?
    I have this probe apart rite now for a clutch and head gasket job for a friend and noticed the oil in the intercooler/pipes etc, and checked the shaft play it feels real good yet 100k on it, If we can freshen it up, or even do something custom to this little IHI he is interested, increasing the turbine flow would be best i think as this beast makes full boost so so low and chokes like mad up top. But if not a rebuild is certainly in need

    Reply
    1. Austin Post author

      if you just want to send the center section thats fine. `For the probe’s IHI turbo, i may have to wait on that to get here to do order the rebuild kit, unless you can get me to information on the front of the housing, I maybe able to figure it out. Our address is

      Turbo Lab LLC
      2295 Big A School Rd.
      Stuart, Va 24171

      Reply
  17. Tommy

    I ripped the 19c off the starquest last nite and will be shipping it out tomoro! I am sending the compressor housing along attached, and I punch marked the turbine housing and removed it as well as all the lines. Give me a shout when you have it, maybe we can make it better than it is now size wise? thanks ahead of time.

    Reply
    1. Austin Post author

      You have a few options for the 19c. The 19c wheel is 50mm x 68mm. You could mate a tdo6sl2 turbine to it that is 54mm x 61mm. Or i could put a billet 20g 7 blade in it (52mm x 68mm x 71mm and 5mm extended) and put a tdo6sl2 or tdo6h4 turbine(58.8mm x 67.2mm) in it. It all depends on your horse power goals and where you would be happy with your spool time. The tdo6sl2 19c spools up pretty quick, we have one guy starting to see boost at 1450 rpm on the starion. Its 240-450$ at the very most for the turbo upgrade. Ian said he thinks the shaft is bad, we sell new tdo5h turbines for 60$, if thats the case. The 450 would include a billet compressor wheel and a turbine upgrade (tdo6sl2 or tdo6h4)

      Reply
      1. Tommy

        Ok if i wanted to upgrade the the turbine to td06sl2 I would need to send you my turbine for machining then? what turbine did i have? was it clipped? is there a billet 19C? or only "g" wheels? i was overall happy with it before, but its the td06sl2 a better match for the 19c anyways? im running stock tbi fuel system on this car (with supporting mods) and the ecu hits fuel cut around 18ish psi so i would assume the bigger 20g compressor would be inefficient at 15-18psi.

        Reply
      2. tommy

        Also,a good friend of mine has a conquest/starion with a td05 moddified to a 16g "super 70" that has the same damage my 19c has. His boost was falling off at higher rpms where my 19c did not even in 1st gear. He is waiting to see how my turbo turns out and wants to send you his for a build, prolly looking for the td06sl2 as well, but he wants his compressor to be differnt than mine, also interested in billet. are there any billet "T" wheels avail? like say a 17c? or do you think a billet 18g td06sl2 would be ok for our boost range? am i an idiot? lol sorry for all the questions

        Reply
          1. Austin Post author

            If his boost is falling off, its because his wastegate spring is not strong enough to hold until redline. You can read about this on the boost control post. Another cause could be a failing turbo also. Looks like i can get a wheel that they call a 17c and a wheel similar to a 19c, both wheel are 6 blade which makes no sense, because then 1 17c wheel is basically identical to an evo3 16g. I would probably upgrade to a tdo6sl2 18g or 20g. I checked out your housing and it rubbed pretty back on the part of the wheel that you cant see. I recommend a compressor upgrade, so i can machine out the grooves. Ill check and see how close the 18g wheel is to fitting tomorrow, it may fit after the 19c rubbing, those wheels are really close in size. If you went 20g, then i could offer an extended tip 7 blade, they are 5mm taller. You had a clipped tdo5h turbine before, but the turbine may be bad, ill have to check. You may need a fuel pump upgrade or a tune, if your not going to tune it soon, i would keep the boost to 15 psi on this next turbo, whatever you have me build.

  18. tommy

    ok, i was really hoping to stay somewhat inexpensive on this build, if i can get away without a compressor upgrade that would be ideal. i dont like the fact that my old turbine was clipped, that would explain some of the lag. i would imagine the td06sl2 would spool faster and out flow the tdo5h clipped turbine? I need to build the td04 for my subaru and im looking at like $550 from what you had said in an earlier post. so staying around 300$ is my goal for this if possible. do you need my turbine housing?

    my starion is not all that tuneable on the stock fi system without a maft conversion. so my boost needs to stay around 15-18 psi, but feed huge the 2.6L 4 cyl. More cfm than pressure persay.

    Reply
    1. Austin Post author

      The clipped turbine does cause lag. But the turbo could have been laggy from touching the compressor housing. Did you find out why it failed. Ill ask my brother too since he took it apart. Its around 450 to do the subie to a tdo4HL 19t. I can just sell you a tdo6sl2 20g for the subaru, but apparently, it may not react well, subarus are so picky. Idk if its the Up pipe problem that they have or what, maybe the long length headers.
      You may just want to go with an evo3 16g if i can make that for you. I found some really good sources for getting gt35R turbos and such recently. Im uploading a video now of what i bought. It takes forever to upload on youtube.

      I need your turbine housing if you want me to machine it for the tdo6sl2 turbine, the larger turbine will make it lag more, but if you make the flow rates of the compressor and turbine close in size then the efficiency is increased and it will lag less. I have one customer with the starion that seen 18 psi on his tdo6sl2 19c that we built for him.

      Reply
  19. Tommy

    The turbo failed I’m guessing shortly
    after I installed it, I was having bad
    driveabilty problems, I was alot younger
    and “dumb” lol and wasn’t running a large
    enough bypass valve, and none at all for a
    a short period of time (car didn’t have one stock) it also accidentilly momentarily hit 30 psi
    once too. So yeah shame on me. I want your opinion on the turbine td05h clipped vs non vs td06sl2? Staying 19c if possible,

    As far as the Subaru I wanna go with the kinugawa 9 blade td04hl turbine and billet 20t extened tip. Do you do port and polish?

    Reply
    1. tommy

      i will send out my turbine housing for the starion tomoro. what do you estimate my bill will be? soi can plan accordingly

      Reply
      1. Austin Post author

        Sorry for the delay, I was up late working on my machined the past 2 days. I know it needs a compressor wheel, so if i just rebuilt it back as a 19c and upgraded the turbine shaft to a tdo6sl2 its 327 shipped. That would include a new compressor wheel, rebuild kit, new turbine shaft and the machining and labor the for rebuild.

        Reply
    2. Austin Post author

      Yes i port and polish. I dont think i have any pictures of my port work i will need to upload some. for the subaru there isnt a lot of porting involved just mild work, its 35$ for a port and polish for a subaru.

      Reply
      1. tommy

        go ahead with the 19c rebuild for 327$ does that include the upgraded style thrust bearings? you should have recieved my turbine housing today or yesterday. Give me a call on my phone when your done or when you want me to send payment. I can do paypal or i can mail you a cashiers check. whatever is best for you. If this turbo comes out great i have at least 2 more turbos for you guys to do and will send you more business. we do not have a reputable turbo builder around here. Do you have any stickers or decals with your name? i will gladly display it for ya.

        Reply
        1. Austin Post author

          Awesome. I got the turbine housing. I just need to get to work on it. Ill let you know when its ready to ship. We have stickers and business cards as well. I only use the kits with the upgraded thrust hardware. Ill take a video of that and put it on my youtube channel. Im trying to provide some good information on youtube as well as on my site. My online store needs some help, but i still have to learn about what to do for it. im taking some classes on how to build my website so that should help.

          Reply
    1. Briceson Standley

      Hello my name is Briceson. I just got a free 14b turbo and I was looking into converting it to a 20g. I’ ve spent maney hours researching what it will take to get the job done. So hear I am. After reading up on everything in you website, I have got a few questions to ask as well as what I would like to do with it, and a quote.
      Alright first off I want a 20g comp wheel, not sure witch one I want to go with but if the billet is seriously only $75 with a rebuild, i’ll probably go billet. Second, do you use genuine Mitsubishi rebuild kits with your mhi turbos? If not I would like a price difference in your reply.
      Third, I noticed you mentioned something about “kinugawa”. Have you used anything from them and whats the success rate once in operation? Fourth, I would like to have a 34mm flapper gate in the turbine housing. What extra would it cost to have that done to it as well? I will also do some extreme porting to the turbine housing before it gets sent off and maybe I might do more. I don’t think I want any other upgrades than that.
      Las tbut not least, I looked into what the different style backs there are and theres two. a flatback and a superback. The 14b is a flatback, and the 20g comp wheel is a superback witch has a different thrust collar. Now gpopshop.com has a rebuild kit for the 14b that has the 16,18,20g superback thrust collar. i’m sure there would be a price difference if that rebuild kit would have to be used.
      Well with everything that I’ve wrote up, I hope it makes since and I get a quote in accordance with what im looking for.
      P.S. A 7 blade comp wheel would be what I would out of the three.

      Reply
      1. Austin Post author

        Sorry about the late reply, this ended up in the spam for some reason. Im going to make this easy to read for you.

        location: Turbo Lab LLC
        2295 Big A School Rd
        Stuart, Va 24171

        answer to question 1) The 20g conversion is $240 with includes a rebuild(labor and rebuild kit), machining (bearing housing and compressor housing), and return shipping. If it needs a new tdo5h turbine shaft we offer then for $75. So if you want a 14b converted to a billet 20g is $315 of you use the factory turbine. If you have a right hand thread shaft that the 14bs have factory, i recommend buying a left hand thread turbine from us for 75, because the right hand thread shaft nuts will come off, we even had this issue with using loctite @31 psi.The car still make 414 hp with a clipped tdo5h turbine and 7 blade billet wheel. So if you did 14b to billet 20g with a new tdo5h turbine your total would be 390. You can also add a new turbine housing for 100 and make it 490 and it will be like having a brand new fp 68hta for a fraction of the cost.

        answer to question 2) We dont use factory MHI kits in all of our turbos, 16g and bigger we usually use rebuild kits with a brass thrust bearing with dual oil ports, thicker thrust colar and spacer, everything else is the same. The upgraded thrust bearing kits are really important for heavier rotating assemblies and for people that are running higher boost levels. Our prices include the cost of the kit that we require for the turbo to prevent failure.

        answer to question 3) Kinugawa parts are good, but I get my parts factory direct they are just a middle man, so i cut out there cost to save you money. Another thing i don’t like about kinugawa is their customer service, i bought some 25g covers for an evo9 from them. 2 weeks after i ordered i contacted them asking them for my parts. They then gave me a tracking number that shipped that day. Then when i got the parts they were the wrong thing, so i had to ship them back and they said they would pay for return shipping and never did. This has happened to me 2 or 3 times with that company already. Eventually i did get the parts about 1 month after i placed the order with them.

        answer to question 4) It depends on the turbine housing that you have. I can offer porting but it just depends if you turbine housing is worth porting, because a lot of them are cracked. We offer brand new turbine housing for 100 that are casted like pre ported 7 cm turbine housings. I can also machine them out for a tdo6sl2(54mm x 61mm 11 blade) or tdo6 (55 x 65mm 12 blade) turbine wheel. The 34mm flapper upgrade i can do for 25$. The flapper is 10 and install and porting 15. We dont carry very many flat back parts for the tdo5/tdo6 turbos just because we do 16g turbos and bigger. We mostly do upgrades.

        All of our turbos besides ball bearing turbos we do component balanced setups, so its pre-balanced and ready to install. We do offer rotating assembly balancing for 50$ more but its not required.

        Reply
  20. tommy

    Im a little curious if you can machine the housings and upgrade this little ihi off my Friends Probe. idk much about them or their interchangability. i do know the stocker spools up rediculously fast and runs out of steam by 4500rpm. The turbine is so small for a 2.2l engine if anything a rebuild with a bigger compressor wheel is possible, this i know, and then maybe clip the turbine wheel? i will get the numbers off of his housing tonight and send them to you. He has a spare turbo now so he can drive his till you build the other one. We all are excited to have found your turbo service and are eagerly awaiting my 19c to come back and see the quality of your work! :)

    Reply
  21. tommy

    thank you very much!

    This IHI turbo from the ford probe, the kid wants to build one. If you could do your research on what can be upgraded on it that would be awesome. i know the compressor can be upgraded, ive done it myself using a wheel and compressor housing from an 87 ford thunderbird turbo coupe, but the turbine i dont know about, i know these turbos have a very small turbine housing and are prone to cracking from exessive heat, the turbine itself is bigger than the td04l in my suby turbo. He has about 450$ to spend on it and is eager to do something. from what i have researched it is not a ball bearing turbo. let me know plz, thnks again.

    Reply
    1. Austin Post author

      What flange is the exhaust housing? Im curious if the IHI turbo is really worth upgrading. I just did a vf40 billet upgrade and it was about a 2mm difference. I also am doing a snowmobile ball bearing turbo that im machining to 50mm. Some of the IHI turbos are worth upgrading and some arent, i need to know the shaft bore so i can order a wheel though.

      Reply
      1. tommy

        its a square 4 bolt flange, not sure what it is, its not t3, or t25, or mitsubishi, i really dont know, it fits all turbo mazdas from the late 80′s early 90′s, we wanted to stick with it cause it mounts rite up, there are other manifolds and options, but then custom downpipe has to be fabricated and a/c has to be deleted, and then there is no way to tension the belt for the power steering. if anything he wants to do the hybrid setuo that i did, and it puts a bigger compressor wheel on and housing. but if you can machine the housing and then clip the turbine wheel and do a full rebuild and port n polish it will be good enough. his core is decent, no typical cracks in the turbine housing, and minimal shaft play, just blowing oil out the compressor side.

        Reply
  22. tommy

    i also wanted to say thank you for the great deal on my 19c upgrade/rebuild, it looks phenominal. My other friend with a Starion is going to send you his original td05-12a and wants to upgrade compressor and turbine. He wants to go td06sl2 with the billet 17c compressor you said is very similar with the evo III compressor.

    Reply
    1. Austin Post author

      Your welcome. Its 450 at the very most with a billet wheel and tdo6sl2 turbine upgrade for his starion turbo. I dont think i can get the billet 17c wheel though. If he wants just a cast wheel its 425. I would really like to see someone go with a tdo6sl2 with the 11 blade 20g wheel, that would be a pretty awesome replacement to get an 11 blade wheel that will flow close to the tdo6sl2 turbine.

      Reply
      1. tommy

        well i got my starion back on the road, i love the new turbo! my buddy doesnt care for all the lag and loss of low end from the big turbine. Pretty sure he just wants to go with a billet evoIII compressor wheel and td05h turbine with 15 degree clip, and updated thrust parts. I will say the td06sl2 does give me phenominal power over 4000 rpm, it pulls past redline! i think its time for an upgraded camshaft to really reel in the power on the high end! ;) Any luck reserching the little ihi turbooptions?

        Reply
        1. Austin Post author

          The biggest i can go on the compressor wheel is 41mm x 56mm. Thats still pretty small, but it just depends on what he is trying to accomplish. It would be a nice upgrade to put a t3 MHI evo3 16g on it or a small garrett turbo. I read that they are t3 flange from the factory.

          Reply
          1. tommy

            is there a bigger turbine option for the little ihi? anything over stock is a big improvement. the little 2.2 sohc makes 300ftlbs at the wheels with the stocker cranked up! SO basically if you can make it bigger in any way without having to go custom manifold and fuel sy stem is what he is after, and staying around 400$

          2. Austin Post author

            Can you send me some pictures of this turbo so i can check it out. I want to have an idea what it looks like. IHI changed up a lot of their basic components on various turbos so a lot of the parts from other turbos that they built are not compatible with the smaller turbos that they built.

  23. tommy

    its not t3 flange from the factory, guys usually weld on a t3 flange to the stocker. but then the a/c has to be deleted and custom stuff has to be made that isnt in the budget.

    Reply
  24. jose

    I was thinking about upgradeing my K04 for my mazdaspeed. What would be the best size and setup for it. I want to push 375+hp.

    Reply

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