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Thread: RHD M52/S52 ITB setup

  1. #1
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    Question RHD M52/S52 ITB setup

    Just came across this kit online, looks like a clean setup, curious to see if anyone on here has tried and ran this ITB kit. Company's from Australia.

    http://racehead.com.au/products-page...50-52-itb-kit/

    m50-itb-e36-instal.jpg

  2. #2
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    I have the kit sitting in my garage awaiting the completion of megasquirt PNP. I have been researching ITBs and this kit for months and I am optimistic that it will compliment my build well.

    There is a shop in PA that has a kit as well and is awaiting install on an E36. I believe these are the only two kits in the US for M5X/S5X right now.
    Last edited by darbyfam; 03-23-2017 at 09:44 AM.


  3. #3
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    I believe Jenvey still produces an ITB kit for the M50/M52/S52 platform. I'm very interested to hear what you think of the RHD kit. First impressions on the quality of the materials provided?

    I'm getting a bit antsy in my pantsy because I'm somewhat close to acquiring all the parts needed for a 3.5" intake system, but after I break down the numbers the cost estimate is nearly the same as the RHD ITB kit.

    Here's my breakdown:

    3.5" Induction Package
    -BMW Euro 3.5" Airbox: $300-350
    -Bosch 803 3.5" HFM: $250 (already bought)
    -Bosch 24lbs/hr Injectors: $100 (already bought); ~$100 to rebuild/balance
    -3.5" Silicone Intake Hose: $100-150
    -Riot Racing BBTB: $265
    -Modified/Ported ASC Secondary Throttle Body: ~$200
    -Schrick Intake Manifold: $900-1000; Extrude Honing and Swaintech White Lightning Thermal Coating: ~$400
    -Shark Injector Reflash: $150
    Approximate Total Cost: ~$2500

    Or...
    -RHD ITB Kit w/ Carbon Fiber Airbox: ~$2000 (Shipping Included)
    -Bosch 803 3.5" HFM: $250 (already bought)
    -Bosch 24lbs/hr Injectors: $100 (already bought); ~$100 to rebuild/balance
    -AFE 3.5" Dry Filter: ~$80
    -Custom Tune: TBD; Could Possibly Use Shark Injector Reflashed?
    Approximate Total Cost: $2650-2700

    This doesn't factor in all the odd bits and pieces I'm probably forgetting (gaskets, hardware, vacuum hoses, etc.), so the actual cost will probably be higher.

    RHD states that all required hardware is included with their kit, and I wouldn't need Alpha N tuning since the Bosch HFM is retained. The only cons I can identify would be the loss of cruise control (never used it anyway) and the loss of ASC traction control (used very often).

    Am I missing anything? Are there any other drawbacks I've overlooked?

  4. #4
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    The quality of the parts is outstanding. I have started the install and have had no issues what so ever. I am taking it slow and taking the opportunity to install an oil cooler and some other upgrades while the intake is out.



    Few little things I have come across so far:

    1. I had to bend my oil dip stick a bit to fit the plenum on. 3 second fix
    2. I am playing with the vacuum setup to ensure I have everything right and clean. The instructions don't cover the vacuum much and you have to figure out a few things on your own. For instance, the ICV on the S52 has a 1" hose and the vacuum setup with the kit has a 1/2" barb. You have to make that transition yourself.

    Overall, I am very happy with the kit so far. I hope to have all the "other" things buttoned up today and attempt to start her tomorrow.


  5. #5
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    So beautiful. Dyno plans?
    2002 BMW M Roaster.
    1998 BMW 328is SCCA E Production road racer.

  6. #6
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    Thanks for your feedback! The few reviews I've read all said good things as well. I'm interested about the details of your build - specifically tuning. Care to share?

    If/when I take the plunge, the installation of this kit will coincide with a large powertrain/drivetrain project (**cough** Aluminum "S52" **cough**).

  7. #7
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    Will be interesting to see if you can achieve a smooth idle, and what happens to your torque curve. But good on ya for the effort. Just for the record, you could have saved a grand on your 3.5" intake cost estimate by substituting an S50 ($75) manifold for the Schrick. Dyno pre/post mod?

  8. #8
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    Certainly could reduce cost with the M50 manifold, but I like what I've read about the Schrick and I wanted to experiment with thermal coating. My coupe is my daily, and the Schrick sounds like it's better at retaining low-end torque.

    ...also, adding higher costs to the 3.5" setup is my way of convincing myself to buy the RHD ITBs.

  9. #9
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    ^ Perfectly reasonable. lol. Certainly your decision puts you way ahead on the uniqueness/$ ratio.
    Last edited by aeronaut; 04-20-2017 at 11:51 AM.

  10. #10
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    My plan is to go to dyno next Friday (4/28) using my current ECU (Miller WAR). This will be a MAF-based dyno. THEN, I am installing Megasquirt and will be going to DIYAUTOTUNE in Atlanta to get it re-dyno'd in early June. That will be a MAP-based dyno. I will post results when I have them.


  11. #11
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    Quote Originally Posted by Nijapo View Post
    (**cough** Aluminum "S52" **cough**).
    How exactly? You going to bore and reline the cylinders?
    Check out the 8legs Racing page: https://www.facebook.com/8legsRacing/


  12. #12
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    My install is complete and I am scheduled for dyno tuning on this Friday (4/28/2017).

    http://vid208.photobucket.com/albums...ps4wv52baz.mp4

    This first dyno session will be with the OEM ECU with Miller WAR Chip. This includes the MAF.

    Later, I will be moving to Megasquirt MSPRO3 and going Alpha-N.

    Last edited by darbyfam; 04-26-2017 at 11:30 AM.


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    I'm impressed.

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    Updates?

  15. #15
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    Sorry. Got them installed and went to the dyno for tuning. Had issues on the dyno which turned out to be #6 injector not being fully seated in the harness. Got that fixed and, somehow (we can't find any evidence of how it happened), I bent a exhaust valve on #6. The head is at the machinist getting squared up and port and polished. New valves, Supertech dual springs, and new lifters are going in. Should be all back together in a week or so (waiting on parts).

    Pic of it installed

    Last edited by darbyfam; 05-14-2017 at 09:04 AM.


  16. #16
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    Oh man that sucks, glad it will be back together soon though. Did the power/delivery feel much different to the butt dyno?

    Sent from my SM-G935W8 using Tapatalk

  17. #17
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    The airbox has little semblance to the extensively engineered CF boxes. Curious as to what appears to be, a) quite long runners which makes the need for a b) tiny plenum and the c) restrictive MAF.
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  18. #18
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    Quote Originally Posted by adamnur View Post
    Oh man that sucks, glad it will be back together soon though. Did the power/delivery feel much different to the butt dyno?

    Sent from my SM-G935W8 using Tapatalk
    I never got to drive it. It's a racecar and cannot be driven on the street. It got towed to the dyno and towed home. Hopefully will get a chance to do some laps at the track once it's back together. Won't have another dyno until I install megasquirt in early June.

    - - - Updated - - -

    Quote Originally Posted by MauiM3Mania View Post
    The airbox has little semblance to the extensively engineered CF boxes. Curious as to what appears to be, a) quite long runners which makes the need for a b) tiny plenum and the c) restrictive MAF.
    The MAF is only there because I am still on stock DME. Will be going Alpha-N with Megasquirt as soon as the MS3PRO PNP is released.


  19. #19
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    Will be interested in seeing your dyno results.
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  20. #20
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    Quote Originally Posted by darbyfam View Post
    I never got to drive it. It's a racecar and cannot be driven on the street. It got towed to the dyno and towed home. Hopefully will get a chance to do some laps at the track once it's back together. Won't have another dyno until I install megasquirt in early June.

    - - - Updated - - -



    The MAF is only there because I am still on stock DME. Will be going Alpha-N with Megasquirt as soon as the MS3PRO PNP is released.
    My bad, I did see the headlight intake but didn't clue in.



    Sent from my SM-G935W8 using Tapatalk

  21. #21
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    Looking good waiting for dyno

  22. #22
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    Still waiting on parts. NEVER use THMotorsports for any of your parts purchases. I placed my order on May 8th and I am still waiting on the valves (springs arrived today).


  23. #23
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    Quote Originally Posted by darbyfam View Post
    I never got to drive it. It's a racecar and cannot be driven on the street. It got towed to the dyno and towed home. Hopefully will get a chance to do some laps at the track once it's back together. Won't have another dyno until I install megasquirt in early June.

    The MAF is only there because I am still on stock DME. Will be going Alpha-N with Megasquirt as soon as the MS3PRO PNP is released.
    Sorry to hear about the setback. How did the car idle on the stock DME?

  24. #24
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    It idled just fine. It should be all back together this weekend.


  25. #25
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    Follow up: Everything installed and shakedown completed on track this past Sunday. Car is running well and feels like it's pulling harder up top. Scheduled for a dyno tune this Friday (June 30) to get definitive numbers.

    Short video of exhaust note on track.

    http://vid208.photobucket.com/albums...psd3w94bbl.mp4
    Last edited by darbyfam; 06-27-2017 at 08:43 PM.


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