Join Today
Results 1 to 16 of 16
  1. #1
    Senior Member
    This user has no status
    JeanPete's Avatar
    Join Date
    Nov 2011
    Posts
    106
    Thanks
    7
    Thanked 30 Times in 21 Posts

    Best compromise for performance exhaust without any drone

    Hello guys,

    Previously on my '96 R, I had a 16T with angled housing, a 3" home-made downpipe with 200 cel cat and genuine catback : there wasn't any drone, but backpressure.

    Currently, I changed my genuine catback for TME one (wishing better response, better exhaust gas flow, less consumption...), and it's droning (not a big drone, but there is one) between 2200 and 2600 revs.

    So I need your help : what's the best solution for upgrading exhaust without any drone, please ?



    May I get back to 3" downpipe with genuine catback (no drone but backpressure)

    or

    go with OEM 16T with straight housing and OEM downpipe + TME catback (no backpressure, but I never tested this way, so I hope it would be drone-free), please ?

    What do give best performances, please ? 3" DP or 2,5" "straight design" catback ?

    (also got a 4.4 remap, blue injectors, R manifold, JR panel air filter, iPd CBV and iPd TCV, iPd Phenolic Intake Manifold Spacer...)

    Thanking you in anticipation.

    Best regards.
    '96 855R 137000 km - R mani - 16T/7 - Home-made DP - Poly bushes, HD CBV & PolySpacer by iPd - JR airfilter - big stage 0...

  2. #2
    Senior Member
    Still more fettling needed,
    will it never end?
    stribo's Avatar
    Join Date
    Jan 2012
    Location
    Tadley
    Posts
    13,326
    Thanks
    2,620
    Thanked 4,587 Times in 3,404 Posts
    I shouldn't get hung up on back pressure too much, as the cat will be causing back pressure, as that's the most restrictive part of the system.

  3. #3
    Randomly Typed Username
    Iraq Lobster
    jamesy12345's Avatar
    Join Date
    May 2013
    Location
    lives on Standard Row
    Posts
    7,389
    Thanks
    4,606
    Thanked 3,343 Times in 2,497 Posts
    Sorry to hear that JP. It was me who said there was no/little drone on my T5 auto (16T straight outlet, 70 mm TME down pipe). That was a saloon though, being an estate can't help

    Maybe it’s the downpipe making the difference, although that is not a good answer as to go back to 70 mm / standard it’s money and time for less power etc

    200 cell cat shouldn’t be very restrictive

  4. #4
    Senior Member
    Lashing it up with binding
    twine.
    Saaamon's Avatar
    Join Date
    Sep 2008
    Location
    Essex
    Posts
    1,448
    Thanks
    699
    Thanked 547 Times in 340 Posts
    I've got a bsr cat back and there's no drone whatsoever.

  5. #5
    Senior Member
    VPCUK reigning car of the year
    Nealevo's Avatar
    Join Date
    Apr 2011
    Location
    Home for now.
    Posts
    3,867
    Thanks
    2,157
    Thanked 2,777 Times in 1,607 Posts
    I had a TME too on my 850, but I had it without the centre box. (silly me) it sounded ace but I did drone, I ve just had a new box put in where the old suitcase one was and its super quiet now until you nail it.

  6. #6
    Senior Member
    This user has no status

    Join Date
    Feb 2013
    Posts
    149
    Thanks
    0
    Thanked 33 Times in 24 Posts
    I've had a GWE cat back on ours, lovely sound and hardly any drone, sorry to hijack your thread Neal (stunning car btw ) does a sports cat and DP make a noticeable difference on the R..

    Cheers

  7. #7
    Senior Member
    VPCUK reigning car of the year
    Nealevo's Avatar
    Join Date
    Apr 2011
    Location
    Home for now.
    Posts
    3,867
    Thanks
    2,157
    Thanked 2,777 Times in 1,607 Posts
    Quote Originally Posted by Red850Restate View Post
    I've had a GWE cat back on ours, lovely sound and hardly any drone, sorry to hijack your thread Neal (stunning car btw ) does a sports cat and DP make a noticeable difference on the R..

    Cheers
    I'm sure it does, it was more vocal, the rollers showed a 4 bhp increase but it felt quicker than that.

  8. #8
    Senior Member
    This user has no status

    Join Date
    Sep 2013
    Location
    Portugal
    Posts
    180
    Thanks
    99
    Thanked 44 Times in 35 Posts
    The TME downpipe has a 100 cell or 200 cell cat?

    V70 2.4T5 M66 Summum

  9. #9
    Randomly Typed Username
    Iraq Lobster
    jamesy12345's Avatar
    Join Date
    May 2013
    Location
    lives on Standard Row
    Posts
    7,389
    Thanks
    4,606
    Thanked 3,343 Times in 2,497 Posts
    Quote Originally Posted by Ric@rdo View Post
    The TME downpipe has a 100 cell or 200 cell cat?
    100 cell I believe

    http://www.tme.se/e_main.htm

    Quote Originally Posted by Svedish dudes View Post

    TME TURBO DOWNPIPE WITH METAL (RACING) CATALYST
    A stainless steel downpipe with catalytic converter with rhodium and platinum coated stainless steel monolith as a complete unit. A very durable 100 cell catalyst, originally developed for racing use that will keep the emissions within the limits. FIA-certified for racing use. OEM quality 3-layer flex coupling. Will in combination with a TME sportexhaust reduce exhaust back pressure measured before the catalyst with up to 85% compared to the factory system. A standard type catalyst on a downpipe is basically useless and in some cases even worse than the original catalyst for high performance use.

  10. The Following User Says Thank You to jamesy12345 For This Useful Post:

    Ric@rdo (Thursday 11th December 2014)

  11. #10
    Senior Member
    This user has no status

    Join Date
    Sep 2013
    Location
    Portugal
    Posts
    180
    Thanks
    99
    Thanked 44 Times in 35 Posts
    If it had 200 cell, would it reduce the drone or even make it go away?

    V70 2.4T5 M66 Summum

  12. #11
    Member
    What does not kill us ... we
    realize stronger
    rise94's Avatar
    Join Date
    Sep 2012
    Location
    France near Paris
    Posts
    74
    Thanks
    0
    Thanked 31 Times in 17 Posts
    Quote Originally Posted by Ric@rdo View Post
    If it had 200 cell, would it reduce the drone or even make it go away?

    Absolutely not!

    When I had my exhaust full 3 "I had a 200cspi catalyst and the drone was there.
    What makes the drone is the downpipe 3 "especially when stainless steel as the material resonates much more than steel.
    The thickness of the pipe also plays ... If the thickness is too thin increases the drone!
    http://www.vpcuk.org/forums/image.php?type=sigpic&userid=8980&dateline=1394569  557
    RiSE94 - COLONEL OF ARMY "R"

  13. The Following User Says Thank You to rise94 For This Useful Post:

    Ric@rdo (Thursday 11th December 2014)

  14. #12
    Senior Member
    This user has no status
    JeanPete's Avatar
    Join Date
    Nov 2011
    Posts
    106
    Thanks
    7
    Thanked 30 Times in 21 Posts
    First I'd like to thank you all (et salut Yann )

    Quote Originally Posted by Saaamon View Post
    I've got a bsr cat back and there's no drone whatsoever.
    Hello Saaamon, do you have it installed with a genuine downpipe, please? Straight housing?


    Quote Originally Posted by jamesy12345 View Post
    Sorry to hear that JP. It was me who said there was no/little drone on my T5 auto (16T straight outlet, 70 mm TME down pipe). That was a saloon though, being an estate can't help

    Maybe it’s the downpipe making the difference, although that is not a good answer as to go back to 70 mm / standard it’s money and time for less power etc

    200 cell cat shouldn’t be very restrictive
    Hello, James !

    Don't blame yourself : your advice was the best I got, and I'm still sure it was the best way to prevent from drone. I'm now believing the best solution for me would be to add a TME downpipe for straight outlet (Thomas from TME said his was 2,75", up to 400 HP). Another French forum member told me his car became extremly noisy when he changed his 18T6 (straight outlet) for a 19T7 (angled outlet). But what a price ! I don't know if there's an alternative solution (2,75" at the most, straight housing, better form for better flow, 200 cat or 100 CPSI racecat).
    The only way to get a TME one in Europe is to buy it at the TME German distributor, but price increases about 42 % incl. taxes but excl. shipping... About 910 € /w shipping...

    James, where did you get your complete TME system, please ?
    '96 855R 137000 km - R mani - 16T/7 - Home-made DP - Poly bushes, HD CBV & PolySpacer by iPd - JR airfilter - big stage 0...

  15. #13
    Lawnmower Boy
    Now known as WAPAHO!!!
    JUDGENINJA's Avatar
    Join Date
    Nov 2004
    Location
    Guildford, Surrey
    Posts
    6,707
    Thanks
    1,058
    Thanked 1,733 Times in 1,162 Posts
    Excuse my ignorance, but I was under the impression that back pressure wasn't relevant for a turbo charged car.


    Current Garage:
    1997 960 3.0L 24v - Polestar...(Honest guv..!!)
    1997 855 T5 S - stripped to 1300kgs gross weight - 14.2sec qtr(rank 17*)
    2001 V40 T4 SE - 14.199@100.15MPH - Hybrid Turbo/VXR injectors and DeCat(Rank 15*)
    *Data Sept 2013
    Any Stuff For Sale - check out my Ebay link

  16. The Following User Says Thank You to JUDGENINJA For This Useful Post:

    p fandango (Tuesday 16th December 2014)

  17. #14
    Randomly Typed Username
    Iraq Lobster
    jamesy12345's Avatar
    Join Date
    May 2013
    Location
    lives on Standard Row
    Posts
    7,389
    Thanks
    4,606
    Thanked 3,343 Times in 2,497 Posts
    Quote Originally Posted by JeanPete View Post
    First I'd like to thank you all (et salut Yann )



    Hello Saaamon, do you have it installed with a genuine downpipe, please? Straight housing?




    Hello, James !

    Don't blame yourself : your advice was the best I got, and I'm still sure it was the best way to prevent from drone. I'm now believing the best solution for me would be to add a TME downpipe for straight outlet (Thomas from TME said his was 2,75", up to 400 HP). Another French forum member told me his car became extremly noisy when he changed his 18T6 (straight outlet) for a 19T7 (angled outlet). But what a price ! I don't know if there's an alternative solution (2,75" at the most, straight housing, better form for better flow, 200 cat or 100 CPSI racecat).
    The only way to get a TME one in Europe is to buy it at the TME German distributor, but price increases about 42 % incl. taxes but excl. shipping... About 910 € /w shipping...

    James, where did you get your complete TME system, please ?
    Direct from Thomas at TME, JP. If you email him he will quote you including delivery

    Quote Originally Posted by JUDGENINJA View Post
    Excuse my ignorance, but I was under the impression that back pressure wasn't relevant for a turbo charged car.
    Eh? u sure?? Jan Woth disagrees...

    http://www.wothrline.com/Cars_engine...rbocharger.htm

    Quote: Don't mistake boost pressure as the same as power - even if the boost pressure is raised, the power may still be unchanged or only slightly increased. If the exhaust back pressure is too high the boost pressure may be very high with enormous heat and high turbine speed in the turbocharger as a result instead of increased power. Extreme heat in the exhaust and excessive turbine speed in the turbocharger is most often the cause to turbocharger breakdown. Extreme heat in the exhaust system due to exhaust back pressure and increased boost pressure is dangerous and the heat can travel back into the cylinder room with risk of damaging both catalytic converter, turbo, exhaust manifold, valves and pistons with a total breakdown as a result.

  18. #15
    Senior Member
    This user has no status
    JeanPete's Avatar
    Join Date
    Nov 2011
    Posts
    106
    Thanks
    7
    Thanked 30 Times in 21 Posts
    Thanks again, James. I wrote to TME European distributor (polar-parts.de). It's about 790 € + shipping... Gotta find a note tree.

    I'll write to Thomas, as I'd like to know if outlet types can modify or add a drone...
    '96 855R 137000 km - R mani - 16T/7 - Home-made DP - Poly bushes, HD CBV & PolySpacer by iPd - JR airfilter - big stage 0...

  19. #16
    Randomly Typed Username
    Iraq Lobster
    jamesy12345's Avatar
    Join Date
    May 2013
    Location
    lives on Standard Row
    Posts
    7,389
    Thanks
    4,606
    Thanked 3,343 Times in 2,497 Posts
    Quote Originally Posted by JeanPete View Post
    Thanks again, James. I wrote to TME European distributor (polar-parts.de). It's about 790 € + shipping... Gotta find a note tree.

    I'll write to Thomas, as I'd like to know if outlet types can modify or add a drone...
    OK JP, good luck. If you need contact for Thomas let me know, he was very helpful & knowledgeable when I spoke with him, and ready to arrange delivery to just about any country

    Just for information I now have a V70R AWD auto 1998, with a non-standard dual exhaust fitted - BSR/Jetex from the cat backwards

    Name:  lights wheels.png
Views: 0
Size:  1.91 MB

    Without looking underneath I know that the downpipe is not 3", as the car is RHD and large downpipe will not fit

    There is no drone at all at motorway speeds - I am guessing that the original downpipe with cat is installed & original turbo hot side (straight outlet)


 

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
This website uses cookies
We use cookies to store session information to facilitate remembering your login information, to allow you to save website preferences, to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.
     
ipv6 ready