1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

FAO Downpipe,sports cat,and aftermarket exhaust owners...

Discussion in 'A3/S3 Forum (8L Chassis)' started by warleydaddy, Mar 19, 2010.

  1. warleydaddy
    Offline

    warleydaddy Member

    Joined:
    Oct 14, 2008
    Messages:
    211
    Likes Received:
    0
    Did you see any differance for you hard earned pennys???

    Just been offerd a full turbo back miltek for a good price,but wont bother if theres no real gains to be made..

    Your thoughts please????

    Pete...
    #1
  2. S3KO4
    Offline

    S3KO4 Member

    Joined:
    Aug 15, 2009
    Messages:
    850
    Likes Received:
    2
    turbo back to mid section! sell this to me then I shall give you my feedback on the rest.:)
    #2
  3. MartayMcFly
    Offline

    MartayMcFly Well-Known Member

    Joined:
    Feb 17, 2009
    Messages:
    2,636
    Likes Received:
    279
    What price? My flex pipe is ticking, and wouldn't mind replacing the dp/cat for milltek rather than just stock, and was going to get a non-res cat back too. Doubt power gains will be anything to write home about, I'm after more of a rumble to the exhaust, without sounding too harsh or "chav".
    #3
  4. 1animal1
    Offline

    1animal1 The Clar!! it mouves!!!

    Joined:
    Dec 27, 2007
    Messages:
    9,981
    Likes Received:
    31
    Pete by all accounts the S3's problem is the Manifold and not the dp/exhaust..... from previous threads it will prob rev a little better but extra power is pretty much a no no - also the Milteks have a habit of knocking at the back - Ess three had his for 2 years i think going back n forth to miltek, still not sorted to this day on his old car

    if its £100-£200 id have it just for hell of it, anymore and id personally be out mate - purely based upon the fact that no gains have ever been proven :)
    #4
  5. s3dave
    Offline

    s3dave TFSI Hybrid

    Joined:
    Nov 11, 2009
    Messages:
    10,120
    Likes Received:
    728
    down pipe is restrictive too
    ive got full milltek with custom d/p no probs here, a bit droney , but thats a non res system with 100 cell stainless cat
    #5
  6. 1animal1
    Offline

    1animal1 The Clar!! it mouves!!!

    Joined:
    Dec 27, 2007
    Messages:
    9,981
    Likes Received:
    31
    yes but the downpipe does not yield more power, this has been proven time and time again - although recommeded by most stage 2 maps, it isnt needed

    same goes for the CAT, the standard item is not that restrictive, a sports CAT on an S3 is a waste of £500

    the manifold is where the main restriction is on the S3, DP is more of a benefit on the A3's
    #6
  7. s3dave
    Offline

    s3dave TFSI Hybrid

    Joined:
    Nov 11, 2009
    Messages:
    10,120
    Likes Received:
    728
    3" d/p gets the air out quicker......thats what its all about on turbo engines
    #7
  8. MintyS3
    Offline

    MintyS3 Works 60% the time, Everytime.

    Joined:
    Jul 2, 2008
    Messages:
    1,581
    Likes Received:
    4
    Will be interesting to see if after you fit an aftermarket manifold whether the dp then makes a bigger difference.
    #8
  9. Andrew@A.L.D
    Offline

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,509
    Likes Received:
    355

    And the hot side of the turbo
    #9
  10. 1animal1
    Offline

    1animal1 The Clar!! it mouves!!!

    Joined:
    Dec 27, 2007
    Messages:
    9,981
    Likes Received:
    31
    fully understand how a modern turbo engine works, simple fact is though that the S3 DP simply isnt THAT restrictive for under 300bhp applications - i dont know how many times i have to reiterate that point

    your car is not making more power because of the DP.... until someone else produces a before and after test in the same conditions with and without (as has already been done) then you won't convince those of us who have seen the results carried out by respectable people
    Last edited: Mar 20, 2010
    #10
  11. warleydaddy
    Offline

    warleydaddy Member

    Joined:
    Oct 14, 2008
    Messages:
    211
    Likes Received:
    0
    Well i loged after doing my airbox,and i know the figures/results.. And if i have this system,i can log what gains/losses i have..

    I will tell all if/when i get it..

    Pete..
    #11
  12. s3dave
    Offline

    s3dave TFSI Hybrid

    Joined:
    Nov 11, 2009
    Messages:
    10,120
    Likes Received:
    728
    lol, i am not going to argue with you, i know how a modern turbo engine works.... the same as a unmodern turbo-d engine, the difference is there are more electric gubbins ,

    im not saying a d/p adds power, but it lets the engine breathe better, lower egts, the faster it gets it out the faster it can breathe it in...... :yes:
    #12
  13. <tuffty/>
    Offline

    <tuffty/> Badger 5 Edition Staff Member Moderator

    Joined:
    Sep 14, 2008
    Messages:
    15,775
    Likes Received:
    1,277
    This at least is true, typically see the turbo spool a tad earlier too...

    <tuffty/>
    #13
  14. DJ_Troopa
    Offline

    DJ_Troopa K1 Driver

    Joined:
    Oct 30, 2008
    Messages:
    1,741
    Likes Received:
    13
    My car pulls alot harder through first gear ever since i've had the exhaust system and i love it! I can definitely say i felt a difference. Cost me £550 including a 200 cell sports cat.
    #14
  15. Andrew@A.L.D
    Offline

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,509
    Likes Received:
    355
    Will there be any problems with the mot with a 120 cell cat?
    #15
  16. <tuffty/>
    Offline

    <tuffty/> Badger 5 Edition Staff Member Moderator

    Joined:
    Sep 14, 2008
    Messages:
    15,775
    Likes Received:
    1,277
    I run a Magnaflow 200 cell cat... works for me, biggest issue with sports cats tend to be that the after cat lambda throws a fault code typically illuminating the CEL in the dash... can be coded out with the right mapping as its only really there to check cat efficiency.

    <tuffty/>
    #16
  17. Andrew@A.L.D
    Offline

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,509
    Likes Received:
    355
    That will do for me
    #17
  18. DJ_Troopa
    Offline

    DJ_Troopa K1 Driver

    Joined:
    Oct 30, 2008
    Messages:
    1,741
    Likes Received:
    13
    I had the fault code flag up when i got my 200 cell sports cat done too. Check the following Ebay item number, 290408003476

    I got 1 of these to get rid of the problem and it's been fine now! That's the exact one i purchased. :) You can only get these in the states but work out to £10 or just less delivered to the UK. Loads of people have got these after they got sport/race cats and was really big in the VAG scene in the states. The adapter goes in first and the sensor goes in behind hit. This pushes the sensor further away so it takes longer for it to read, therefore no more fault code! If you got the light on your dash just clear it off after you got this fitted and you'll be fine.

    Hope that helps.

    Jay
    #18
  19. jonny87
    Offline

    jonny87 Active Member

    Joined:
    Sep 24, 2009
    Messages:
    1,098
    Likes Received:
    3
    yer my understanding is what dave said, the faster you get the fumes out the faster you can get fresh air in, meaning better throttle response, faster spool up and generally a happier engine?

    just my take on things, i come from a world of n/a where you gotta get the balance between free'ing up the flow of gases but not so much as to lose critical back pressure, but on forced induction back pressure is not what you want?

    back on topic and to op, i didnt buy my miltek, it was already installed, but what ive noticed (and im sure ive read on here too) the miltek backbox with the same twin pipe design as oem s3 back box sits on the piss for reason, dont know why, maybe its just mine not seated correctly but can be a bit irritating lol

    mine is a non res and i love it, nice and quiet but has nice note to it when on the go pedal, think the resonating one is not much different, could be wrong though, of course
    #19
  20. Andrew@A.L.D
    Offline

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,509
    Likes Received:
    355
    Witch sensor did you use this on?

    The one before cat or after cat?
    #20
  21. DJ_Troopa
    Offline

    DJ_Troopa K1 Driver

    Joined:
    Oct 30, 2008
    Messages:
    1,741
    Likes Received:
    13
    Andrew - ermmmmm lol pretty sure it's the one after the cat. Whichever one causes the issue that's the one! lol. I've had it on my car for over a month now and no issues at all. When i had the issue come on, i used to clear it, and it would come back again 4-5 days later! But now is all good! I've spoken to a couple of people who have had it for a year and been fine.
    #21
  22. Andrew@A.L.D
    Offline

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,509
    Likes Received:
    355
    Thought it would be but i was just making sure
    #22
  23. 1animal1
    Offline

    1animal1 The Clar!! it mouves!!!

    Joined:
    Dec 27, 2007
    Messages:
    9,981
    Likes Received:
    31
    not arguing either fella, i took your post to mean that you had gained power by adding your DP..... apologies if i mistook you for one of the new breed of owners that apply 'corsa' mentality :)
    #23
  24. s3dave
    Offline

    s3dave TFSI Hybrid

    Joined:
    Nov 11, 2009
    Messages:
    10,120
    Likes Received:
    728
    no worries.. im a bit past that stage at... 40 :)
    #24
  25. 1animal1
    Offline

    1animal1 The Clar!! it mouves!!!

    Joined:
    Dec 27, 2007
    Messages:
    9,981
    Likes Received:
    31
    blimey Dave its folk like you that makes me feel young again :p
    #25
  26. <tuffty/>
    Offline

    <tuffty/> Badger 5 Edition Staff Member Moderator

    Joined:
    Sep 14, 2008
    Messages:
    15,775
    Likes Received:
    1,277

    What you trying to say Tim, I am 44 this year LOL

    <tuffty/>
    #26
  27. 1animal1
    Offline

    1animal1 The Clar!! it mouves!!!

    Joined:
    Dec 27, 2007
    Messages:
    9,981
    Likes Received:
    31
    oh today is just getting better and better!! :)
    #27
  28. <tuffty/>
    Offline

    <tuffty/> Badger 5 Edition Staff Member Moderator

    Joined:
    Sep 14, 2008
    Messages:
    15,775
    Likes Received:
    1,277
    Glad to help you whipper snappers any way I can :happy:

    <tuffty/>
    #28
  29. 1animal1
    Offline

    1animal1 The Clar!! it mouves!!!

    Joined:
    Dec 27, 2007
    Messages:
    9,981
    Likes Received:
    31
    mate i have been wallowing in my own self pitty ever since hitting the big '30'... :)
    #29

Share This Page