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Thread: Bobby Singh's Audi A4 3.0 TDI Project car

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  1. Re: Bobby Singh's Audi A4 3.0 TDI Project car 
    #91
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    March / April 2021

    Well the second port got welded up:


    The hunt for a exhaust solution continued objective being
    - Slient (as can be)
    - no droning
    - Good fitment

    Decided on a RS4 exhaust 2 x 65mm pipe work with built in valves


    Stock 3.0TDI 1x65 to 2 x 54mm


    76mm to 2x65mm adaptor




    Note additional mount is required for the centre box and I had the whole flexi section made in 76mm

    Diffuser drama


    So I wanted to go with a RS4 rear diffuser but it seems none are available for a S line model.
    Went to a exhaust place they suggested pointing the inner back box tip downwards and then building a tip with suitable bends for the stock diffuser.



    Somehow I didn't like that idea and after speaking with a few people I decided to so with a S4 diffuser, idea being the exhaust opening is larger to suit the twin tips of the RS4 box.
    Still needed some tips and scanning through ebay I found some C7 RS6 tips for cheap money







    Old diffuser off and vac lines for the valves ran:





    As the RS6 tips are open back I tack welded the tips into the correct position and then made a back plate for both sides and welded them - tips are now stronger than the rest of the exhaust!!







    Very pleased with the end result and a perfect solution for still keeping the car civil.

    Purchased this vac unit for the exhaust flap control - works good enough:
    - YouTube

    Performance
    So to recap the back pressure with stock exhaust was 458mbar and with the RS4 exhaust and 76mm flexi section we have 24mbar.
    This resulted in 50 deg EGT drop - very impressive and gives further scope for more fuel.

    The only disadvantage is weight - the RS4 with its additional centre box and larger pipes does add weight but I can live that to save my ears.

    Cheers
    Bobby
     
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  2. Re: Bobby Singh's Audi A4 3.0 TDI Project car 
    #92
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    Enjoy


    New barrier broken today everyone Feel free to share it out
    https://youtu.be/miL_8vjD-H0




    603hp / 1080nm (800lbft)
     
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  3. Re: Bobby Singh's Audi A4 3.0 TDI Project car 
    #93
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    April 2021

    A good friend of mine put together this video for me - hope you you enjoy it:
    BSR - Audi A4 3.0TDI could it be the most powerful 3.0TDI? - YouTube
     
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  4. Re: Bobby Singh's Audi A4 3.0 TDI Project car 
    #94
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    Nuts!! Looks great too.
    Current- A6 C8 40 tdi quattro s line Daytona Grey
    Gone-S3 sportback, A6 C7 biturbo saloon,A4 B 8.5 avant, A6 C6 3.0 tdi Quattro saloon, A6 C5 2.8 Q Avant
     
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  5. Re: Bobby Singh's Audi A4 3.0 TDI Project car 
    #95
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    Thanks Scott
     
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  6. Re: Bobby Singh's Audi A4 3.0 TDI Project car 
    #96
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    what oil recomended to the car?

    5w30 or 5w40??

    thanks
    Last edited by Maxtorke; 14-08-2021 at 06:58 PM.
     
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  7. Re: Bobby Singh's Audi A4 3.0 TDI Project car 
    #97
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    5/30 currently
     
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  8. Re: Bobby Singh's Audi A4 3.0 TDI Project car 
    #98
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    November 2021


    Not much has been done to the car apart boost/EGT gauge change





    Can be programmed as required:



    Longer probe



    Custom support bracket






    In the meantime for those who may not know check out my S2 thread:


    Bobby Singh's Audi S2 avant project | Audi-Sport.net


    Cheers


    Feb 2022


    Not done much on the car but tried some 0 to 60mph test:


    Bobby Singh’s A4 600hp/1100nm dragy test - YouTube


    Cheers
     
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  9. Bobby Singh's Audi A4 3.0 TDI Project car 
    #99
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    wow, hello, you are really prepared, I am also working my egr





    for the filler under the egr I bought the tube of the previous BMK engine.




    number 27 is the oldest egr filler fits perfectly and on the monobloc there is already the thread for the locking screw

    27 codice oem 059121065ab

    28 oring codice oem n90452002

    29 codice oem n10405604


    sorry for my bad English...
     
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  10. Re: Bobby Singh's Audi A4 3.0 TDI Project car 
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    Quote Originally Posted by lucaropa View Post
    wow, hello, you are really prepared, I am also working my egr





    for the filler under the egr I bought the tube of the previous BMK engine.




    number 27 is the oldest egr filler fits perfectly and on the monobloc there is already the thread for the locking screw

    27 codice oem 059121065ab

    28 oring codice oem n90452002

    29 codice oem n10405604


    sorry for my bad English...
    Thanks - yes I have seen these but I didn't change mine in the end, left it as I done it a few years ago.
     
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