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Thread: Puff's "What's A Turbo?" '95 E34 Build Thread

  1. #1
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    Smile Puff's "What's A Turbo?" '95 E34 Build Thread

    Intro:

    Howdy!

    A couple years ago I bought a '95 525i/5 for $1000. It was sitting at around 240k at the time of purchase and I've run it up to about 275k in my time of ownership.

    Almost as soon as I signed the title I was fantasizing about turboing the car at some point, and now I finally have the time/funds to do so. The goal is to hit somewhere in the 350whp range without completely demolishing my bank account or car. Without further ado, let's give it a shot.

    Disclaimer: I will be asking dumb questions. Please be patient with me as I learn the ropes. I've spent a lot of time perusing turbo build threads, but I'm pretty sure I've learned next to nothing.


    Legend: Anything with a <?> next to or in it means I'm a little unsure if what I have is correct and would appreciate anyone's insight or suggestion on the matter.

    A list of parts I have so far:
    - Ebay HX35 (May consider getting something a little less...Ebay <?>)
    - Tubular T3 top-mount exhaust manifold that was used on a running FI setup (per the previous owner)
    - Blitz BOV
    - Tial MVS 44mm Wastegate
    - A small ebay intercooler
    - An MS3 Pro, the wiring harness that comes with it, and a gutted MS41 DME case with the 88-pin connector and 6 stock coil drivers
    - LC-2 Wideband
    - A lot of time and patience

    A to-buy list:
    - MAP Sensor <?>
    - Charge piping
    - Oil feed and drain + fittings
    - Gauge(s) for interior
    - A new wiper reservoir to relocate <?>
    - Muffler(s) <?>
    - VANOS banjo bolt for turbo oil supply
    - Catch can <?>
    - Injectors <?>
    - An electric fan to replace the stock one <?>

    Here's the to-do list in no particular order:
    [] Swap the M50TU to a refreshed single-VANOS M52 (ARP Studs and VAC .120 <?> headgasket)
    [] Build the adapter harness with the MS3Pro
    [] Install the manifold and turbo
    [] Install the intercooler and charge piping
    [] Get a downpipe and exhaust welded up
    [] Install exhaust
    [] Tap the oil pan for oil return <?> I've read something or another about using the stock drain location with a new bolt and a T <?>
    [] Install oil supply and return
    [] Install the MS3Pro/Adapter
    [] Tune away


    Pictures:
    Snapchat-678915544.jpgIMG_20180428_110347.jpg
    Last edited by CallMePuff; 05-09-2018 at 08:06 PM.

  2. #2
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    Small shipment of things arrived today!

    IMG_20180509_180946.jpg

    - LC-2 Wideband
    - Lots of solder
    - Ring connectors
    - Braided sleeving
    - Heat shrink (I actually got the wrong size, so I'm ordering some additional)

    Does anyone have a pinout for the MS3Pro to M50TU harness? I've made something of a pinout, but I'd like to verify with a working one.
    Last edited by CallMePuff; 05-09-2018 at 08:07 PM.

  3. #3
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    Is that an E36 manifold? I don't think there is room to do bottom mount on an e34
    86 325es, 2.8L NV m50, S366, Megasquirt 2, e85, solid rear axle, 4 link, spool, T56 Magnum trans, 28x10.5w slicks, zip ties
    Best = 9.43 @ 149.15 mph, 1.30 60 foot 28 psi boost

  4. #4
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    Quote Originally Posted by someguy2800 View Post
    Is that an E36 manifold? I don't think there is room to do bottom mount on an e34
    No, it was off of a boosted E34 also; top mount!

  5. #5
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    Quick question: has anyone successfully blocked off or removed an internal wastegate? I have this ebay turbo which looks to be of decent quality, but I could also just go for one that already doesn't have an internal since I have the Tial 44mm. Thoughts?

  6. #6
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    Quote Originally Posted by CallMePuff View Post
    Quick question: has anyone successfully blocked off or removed an internal wastegate? I have this ebay turbo which looks to be of decent quality, but I could also just go for one that already doesn't have an internal since I have the Tial 44mm. Thoughts?
    Get a quality turbo that can utilize the tial 44mm ewg. Looks can be deceiving....

    96 328is turbo
    98 Hellrot M3/4/5

  7. #7
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    Quote Originally Posted by bmw328m52 View Post
    Get a quality turbo that can utilize the tial 44mm ewg. Looks can be deceiving....

    I can work with that. It's turning out that this "setup" that I bought last year which included 2 manifolds, a stock fuel rail (why?), the BOV, an ebay wastegate, and some piping was not really worth it lol. I've replaced the turbo (which will seemingly get replaced now), the wastegate, and won't be using the fuel rail. Expensive mistakes! Thanks for the insight.

  8. #8
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    Today I got the copious amounts of colored 20g wire that I ordered along with the correctly sized heatshrink tubing. We've also got some .31" diameter solder, ring connectors, the MS3Pro, and the 88-pin connector with the stock coil drivers. I'm going to attach my pinout; if anyone has an inkling of info for an OBD1 M50TU/M52 to MS3Pro, let me know!

    https://docs.google.com/spreadsheets...pub?output=pdf

    IMG_20180511_162536.jpg

  9. #9
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    Hi all,

    I have the option of going for a new 5858 journal bearing for about $1000 or a Garrett 60-1 journal bearing for $850.

    Opinions? I'm trying to educate myself on turbo specifications, but I'm sure your collective knowledge is greater than I can learn!

    EDIT: Borg Warner also an option?
    Last edited by CallMePuff; 05-15-2018 at 08:27 PM.

  10. #10
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    Quote Originally Posted by CallMePuff View Post

    Almost as soon as I signed the title I was fantasizing about turboing the car at some point, and now I finally have the time/funds to do so. The goal is to hit somewhere in the 350whp range without completely demolishing my bank account or car.
    You will blow the engine before you even get it to run right, happens to 90% of the noobs. Looking at the parts you already bought, I know it is going to be a mess. E34 is a heavy car and 350hp is nothing, stock E34 540i will be able to keep up with you. When you put your whole plan on a paper you will realize it is a waste of money and time.

  11. #11
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    Quote Originally Posted by hakentt View Post
    You will blow the engine before you even get it to run right, happens to 90% of the noobs. Looking at the parts you already bought, I know it is going to be a mess. E34 is a heavy car and 350hp is nothing, stock E34 540i will be able to keep up with you. When you put your whole plan on a paper you will realize it is a waste of money and time.
    While I appreciate your concern, telling me this benefits me in no way if there's no advice to accompany it. What exactly makes it a mess?

  12. #12
    Join Date
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    don't feed the troll
    86 325es, 2.8L NV m50, S366, Megasquirt 2, e85, solid rear axle, 4 link, spool, T56 Magnum trans, 28x10.5w slicks, zip ties
    Best = 9.43 @ 149.15 mph, 1.30 60 foot 28 psi boost

  13. #13
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    350 is plenty of fun. And the build could be done for <3k

    I wouldn't build a 350 car to go around and try to race it anyway... Who would

  14. #14
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    Quote Originally Posted by 328iFun View Post
    350 is plenty of fun. And the build could be done for <3k

    I wouldn't build a 350 car to go around and try to race it anyway... Who would
    Yeah it's basically just to not have the stock 180-something horses. I'm trying to do it right though so that it can be pushed a little further since I've read about people just pushing it a little further once the current power gets stale.

    Sent from my Nexus 6P using Tapatalk

  15. #15
    Join Date
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    My sights are aimed in the general direction of a Precision 5858 .82 A/R or a friend has a Garrett 60-1 for sale at .63 A/R.

    Which one of these is going to work best for the 2.8L?

  16. #16
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    HackerTT giving unsolicited shitty "advice" again. What a surprise? He also said my standalone would "Never run right" but while I have 1 small bug to work out still it runs just as well as the car ever did stock and I didn't lose any OEM features. My cluster works 100% (unlike his) EVEN the MPG gauge will work once I connect 2 wires!!! He gives us shit if we take more then 6 months to build a car but I did mine in a year once I pulled the engine and it took him 3-4 according to the pictures I found online of him doing it on another car. I mean if I had a second try at doing all of the stuff I did on mine I'm pretty sure it would only take me a couple months to build soo.....

    Rant out of the way.... I have a Genuine Holset HX35 on mine. I LOVE this turbo for a street car but I would STRONGLY advise getting a real one AND a 14cm housing to go with it. This turbo can easily make 400 whp, I'm making 352 at 12 PSI and still cranking it up (on E85). Mine was a $200 used one on ebay that said "for core or rebuild" when I got it I inspected it and everything seemed fine so I just put it on and it's perfect, there's literally nothing wrong with it. HX35's just last forever.
    1997 328is - Mishimoto Rad - 17" wheels - E46 Sport seats - Suede headliner - M Bumper - A118 Dashcam - Escort Radar Detector - FX-R Bi Xenon Projectors - iJDM Switchback Angel Eyes - Joying Android Double DIN head unit, Megasquirt PNP, Holset HX35, Deka 80lb injectors, SPA T3, Precision PW39 WG, Synapse Synchronic BOV, GM Flex Fuel sensor, Innovate LC-2 W/B, Mishimoto Intercooler, Mishimoto Catch Can, Corsa Exhaust

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