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Bobby Singh A4 3.0 TDI build thread

bobby singh Jul 14, 2015

  1. TimberVD

    TimberVD Registered User

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    Considering the ABT tuned Nogaro RS6 needs 705bhp to get to 199mph, I assume so too. :tonguewink:
     
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  3. Enigma2

    Enigma2 Registered User

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    Hehe, I have looked at them for a while and felt that the C7 is not worth double the price over a fresh B8...

    One thing I don't understand is why your MAF was restricting power since it should be the same 1400Kg/h element the 3.0bi-tdi MAF have inside, just in a smaller housing, also according to ETKA. 059906461N should be in your engine and the bi-tdi the same but ending with "Q" with element number 420133471. If I am mistaken then I also have to change this as I am going to bottom out the stock 2260 with an 4bar MAP sensor.

    Just to verify, to reach 316hp/720nm with the 2260 you did this with 1800bar rail pressure and 850c EGT?
     
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  4. bobby singh

    bobby singh BSR Gold Supporter VCDS Map User

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    Element is same yes but you realise element and housing are calibrated together.
    Sure you can trick the smoke limiter but I like to measure correct air flow.
     
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  5. Enigma2

    Enigma2 Registered User

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    Then I just go with the whole "Q" part and take some hoseadapters to turbo after the bi-tdi MAF.

    I looked up some guys with our transmission and looks like they shave off at least 0.5sec 0-100 at stock engine tune. I imagine it's even a bigger difference on your car! You have to upload some speedo vids with that torquemonster, at least after you tweaked your TCU. Can't wait even if I can imagine you have eaten the 3.0tdi candy alot now :) The very tuned BMW's must get chocked when they can't take on you, even not in higher speeds I guess.
     
  6. TimberVD

    TimberVD Registered User

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    Hi Bobby, have you got any idea what your next project car will be? Will it still be a diesel or perhaps petrol?

    Do you do any tuning for petrol cars or is it strictly diesels?
     
  7. bobby singh

    bobby singh BSR Gold Supporter VCDS Map User

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    Hi Timber, not 100% sure to be honest. But I would like to make a 11's pass in this car before I move on.
    Yes can do petrol cars - have done a few tfsi's over the years.
     
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  8. Enigma2

    Enigma2 Registered User

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    @bobby singh 3 short questions..

    • Is 2400bar the highest rail pressure you have run so far hitting 505hp?
    • Which rail sensor fits?
    • Mpg still like stock or better at normal cruising/highway?
     
  9. bobby singh

    bobby singh BSR Gold Supporter VCDS Map User

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    Ask your tuner these questions.
    Mpg is worse than stock at the moment maybe down to cold conditions and plus the fact I’m giving the car more WOT now
     
  10. Enigma2

    Enigma2 Registered User

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    I just wondered how far you took stock injectors to save some time, that's all. I suspect you used 2300bar at the 461hp. I just have to search for one railsensor then. No tuner to ask, I am building myself but diesel is new to me.

    Still got plans to remap the TCU? Wish you and the car well from Norway
     
  11. bobby singh

    bobby singh BSR Gold Supporter VCDS Map User

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    April 2018

    Been a while but been busy on other projects.
    I had a issue with a leak on the oil return line rubbing on a bolt:

    [​IMG]

    So decided on a banjo fitting @ 30deg which gave me perfect clearance with new a -10 hose

    [​IMG]

    [​IMG]

    Also, BW do a compressor housing which according to the compressor map had less surge so this was installed at the sametime:

    [​IMG]

    On a side note these are the best clamps I have ever come across - they apply fixed torque regardless of temperature changes.

    [​IMG]

    [​IMG]

    So far the results are very good I can demand more torq low down without going into surge :)

    Plenty air available top end.

    Next little project will be to measure cylinder pressures


    Cheers
    Bobby
     
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  13. Lucian189

    Lucian189 Registered User

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    That engine bay....reminds me of something..
    [​IMG]

    Trimis de pe al meu SM-J510FN folosind Tapatalk
     
  14. bobby singh

    bobby singh BSR Gold Supporter VCDS Map User

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    @Lucian189 nice work
    How you find the lag (assuming S356v ? )
    CAPA engine Im assuming with a extra feed pump
     
  15. Lucian189

    Lucian189 Registered User

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    Whell it had full boost at around 2.5k rpm in 3th...(manual gearbox).
    Was going decent even at low rpm ..
    But turbo was S300V .
    Car is sold for some time now..
    Realy nice results with yours ,as I mentioned in the other forum..
     
    Misikee likes this.
  16. SRT88

    SRT88 Registered User

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    Greetings,
    I have mounted an aux 5BAR pump to a BMK engine which receives signal from in tank low pressure pump (separate relay, separate 12v input). This means that as soon crankshaft sensor sees 40rpm the pump is on. However the aux pump is controlled by EDC17 on different pin (mine is EDC16 so no such control) - I use the 12v line after the oem relay as a signal for the additional aux pump relay.
    My question: does somebody know how the aux pump is controlled? Does it work all the time? If yes is it progressive or max power all the time?
    Please let me know if you have any information on this topic.
     
  17. macradiators

    macradiators Registered User

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    I also have both electrical pumps connected with the CP3 pump on both cars i use (ccwa and 2.0 cr engine)
    Bobby it's time for a low 11.x seconds pass, when do you try it?

    And how is the pcp device coming? This should be very interesting tool for high end power tuning, but probably expensive sensors.
     
  18. bobby singh

    bobby singh BSR Gold Supporter VCDS Map User

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    I've never really looked into it - but will be consistent power when engine is running, but I would expect a cut out once priming is complete.

    Mac - Time is always short these days, but yes its on my to do list - I'll be happy with high 11's never mind low :)
    Off course the car can make more power if I was careless and just poured in fuel but this is not my style. The time and effort required to make a smoke free, emp/ egt friendly tune is far greater than just dumping in boost and fuel.

    Cheers
     
    Lucian189 likes this.
  19. desertstorm

    desertstorm Moderator Staff Member Moderator VCDS Map User

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    Are you sure you really want to see how much pressure is being generated in the cylinder it might scare you :) .
    I presume a standard PCP sensor in a glow plug might not have the range to cover the pressures you expect to see, assuming they make one that will fit in the engine. Will probably be the most expensive glow plug you ever buy.
    http://beru.federalmogul.com/diesel...-start-products/pressure-sensor-glow-plug-psg
     
  20. ion2211

    ion2211 Registered User

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    Hi, where exactly is the Map sensor located on the engine? I have had a look out of curiosity but cant see it?
     
  21. fireboy

    fireboy Registered User

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    It's the number 11 in the diagram
     

    Attached Files:

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  22. ion2211

    ion2211 Registered User

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    Perfect. Thank you!
     
  23. macradiators

    macradiators Registered User

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    Bobby how much boost is your setup making in launch mode?
    This gearbox has great potential if you can remap it and improve times and adjust rpm for each gear.
    The xhp is making a great job on the same gearbox on bmw.
     
  24. bobby singh

    bobby singh BSR Gold Supporter VCDS Map User

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    Boost is dependent on how much risk you willing to take, nothing limits you to building boost.
    Yes i know about xhp - i did offer my car as a test for his software but he seems too busy with bmw zf boxes at the moment. I’ve made some changes to gearbox sw recently but it’s pretty complex.
     
    Lucian189 likes this.
  25. macradiators

    macradiators Registered User

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    I would also invest in an A5 tiptronic as it's lighter but the gearbox scares me for drag racing.. I got the same answer from them. Took them 1.5 years to be able to protect the sw for bmw gearbox.
    Better to go with the new tiptronic 8hp55 which is much better.
     
  26. The Jargen

    The Jargen Registered User

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    When you say you've made changes to the software, you just mean the shift map right? And not actual valve control, clutches etc..
     
  27. bobby singh

    bobby singh BSR Gold Supporter VCDS Map User

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    Correct - aim is to shift by certain rpm to keep it on peak power.
     
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  28. bobby singh

    bobby singh BSR Gold Supporter VCDS Map User

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  29. meph137

    meph137 Registered User

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    @bobby not a technical question but I’m curious. How did you actually get in to doing all the mapping stuff you do? I’m fairly practical I’d say but no mechanic so things such as changing turbos is well beyond my remit, but I could imagine being able to tackle such a job given time, but the ecu element seems another ball game entirely and one I have no idea how you get in to, it feels fairly voodoo to me and I’m a software engineer!!


    Sent from my iPhone using Tapatalk
     
  30. V6_Man

    V6_Man Moderator Staff Member Moderator VCDS Map User

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    Bobby is a genius! I have met him, seen his workshop and some of his work, tis pure art!


    Sent from my iPhone using Tapatalk
     
  31. holmefield

    holmefield Registered User

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    I wish i lived closer to bobby singh and i also wish my A7 hadn't sprung a water leak which cost me £1300 to fix as i would have got him to work some magic on my A7.

    He quoted me 310/330bhp ( on a 245bhp engine ) and a gearbox remap... god i'd have loved that... im in saving mode now to finally get it done.
     
  32. bobby singh

    bobby singh BSR Gold Supporter VCDS Map User

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    Understanding hardware operation and limits helps make decent sw.
    Plenty of reading and testing helps but its all time consuming

    Recently these have shown an average of 330 to 335hp with around 750nm - the vzk unit makes slightly more than the vk it seems.
     
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  34. holmefield

    holmefield Registered User

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    My A7 245 bhp is the 7 speed S Tronic thou Bobby, and i thought even with the gearbox map that you said you'd do @ the same time as the remap 750 nm would be pushing the box to far?

    I thought the 7 speed S Tronic was only good upto about 600 nm ? but 330 bhp does sound like a lot of fun, god i need to get saving and come down and see you...
     
  35. bobby singh

    bobby singh BSR Gold Supporter VCDS Map User

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    I've done a few now at 750nm they seem to handle it fine, but yet you see reports of them breaking with stock power.
     
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  36. bobby singh

    bobby singh BSR Gold Supporter VCDS Map User

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    July 2018

    PCP findings are interesting, lets just say its amazing the heads are still on :)
    [​IMG]

    Cleaned out the intank fuel pump:

    [​IMG]

    [​IMG]

    When 4 bar map sensor is no longer enough - 6 bar sensor fitted.
    The probe is 18mm and the plastic hard pipe does not have enough material to drill it out.

    [​IMG]

    [​IMG]


    Cheers
    Bobby
     
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  37. mdmay

    mdmay Registered User

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    Looking interesting mate

    Sent from my SM-G955F using Tapatalk
     
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  38. desertstorm

    desertstorm Moderator Staff Member Moderator VCDS Map User

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    I did say earlier that you may be surprised about the peak cylinder pressure values. Given the levels of torque the engine is producing they must be well above what would normally be considered safe.
    Are you going for some kind of compound turbo solution ?
     
  39. bobby singh

    bobby singh BSR Gold Supporter VCDS Map User

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    No not going for compound turbo - this turbo can spool better but surge becomes a issues.
    In terms of top end there is plenty air available just need more fuel - 550hp could be on the cards
    But looking at the PCP lower compression would help for sure.
    Having said that I'm happy with it - could do with a better pump though cp3 is on its knees.
     
  40. bobby singh

    bobby singh BSR Gold Supporter VCDS Map User

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    September 2018
    Nothing new to report but now have covered 10k on the new the turbo set up.
    Done some more testing with a couple of new gearbox tunes:

    0 - 60 - best i can get is 4.2s (same as before)
    0 - 100 has improved 8.7secs (previously was around 9.3s)
    All timed with VCDS @ 20hz

    Looking at the 0 to 100 I would say high 11's is on the cards. Just need to find the time to do a few runs

    Cheers
     
  41. markm,

    markm, Member It's my birthday

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    I do like the X17 :)
     
  42. bobby singh

    bobby singh BSR Gold Supporter VCDS Map User

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    September 2018

    For the last few months I've been getting chain rattle on start up.
    Didn't think much of it as it cleared pretty quickly.
    However, before things got worse I thought I'd take a gamble and change the tensioners and guides on both banks before taking the engine out to do all the chains etc.

    Febi chain kit (oem)
    [​IMG]

    RHS bank
    [​IMG]

    LHS bank
    [​IMG]

    Wearing:
    [​IMG]
    [​IMG]

    The old tensioners appear to be leaking/not holding pressure until the engine oil pressure was enough.
    Covered approx 500 miles and no rattle so far.

    Worth doing these first I suggest if anyone gets the same issue.

    Cheers
    Bobby
     
  43. Gazwould

    Gazwould Registered User

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    What's the mileage Bobby ?
     

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