Username or Email Address
Do you already have an account?
Forgot your password?
  • Log in or Sign up

    VWVortex


    Results 1 to 23 of 23

    Thread: Hi flow cats vs. test pipe.

    1. Member v2.'s Avatar
      Join Date
      Oct 18th, 2007
      Location
      Johnson City, TN
      Posts
      7,863
      Vehicles
      MKIV R32
      10-04-2012 01:44 PM #1
      Which is better in terms of power gains and why? I'm getting ready to change tunes from GIAC to UM and I want to either eliminate my cats or get hi flow cats at the same time.
      Quote Originally Posted by VincewagenR32 View Post
      Torque is a motherf***er

    2. Member ParkeR32's Avatar
      Join Date
      Mar 22nd, 2012
      Location
      Jackson, NJ
      Posts
      1,252
      Vehicles
      MkIV .:R32
      10-04-2012 02:07 PM #2
      Also curious about this

    3. Member Khunez's Avatar
      Join Date
      Feb 27th, 2009
      Location
      Austin TX
      Posts
      1,583
      Vehicles
      2012 Golf R
      10-04-2012 02:17 PM #3
      this has been settled and tested....NA = HF cats You loose power with the straight pipe.
      Turbo is a different story.
      Art
      WWW.JoshCoons.blogspot.com
      Music
      http://www.mixcloud.com/BossFight/
      Retired: 04 r32 turbo, 04 Audi tt 225, 04 r32 bmp, 07 audi Rs4

    4. Member v2.'s Avatar
      Join Date
      Oct 18th, 2007
      Location
      Johnson City, TN
      Posts
      7,863
      Vehicles
      MKIV R32
      10-04-2012 02:28 PM #4
      Quote Originally Posted by Khunez View Post
      this has been settled and tested....NA = HF cats You loose power with the straight pipe.
      Turbo is a different story.
      I saw threads with debates of which was better, but wasn't sure which to believe...thanks
      Quote Originally Posted by VincewagenR32 View Post
      Torque is a motherf***er

    5. 10-04-2012 02:32 PM #5
      Got the usp test pipe being dropped off today. Probably have it in tomorrow or Saturday. Fingers crossed its not too raspy or ill b throwing some hfc's in it.
      I feel 10 feet tall right now, And strong as a Ox

    6. Member Khunez's Avatar
      Join Date
      Feb 27th, 2009
      Location
      Austin TX
      Posts
      1,583
      Vehicles
      2012 Golf R
      10-04-2012 03:09 PM #6
      Quote Originally Posted by Billkelly25 View Post
      Got the usp test pipe being dropped off today. Probably have it in tomorrow or Saturday. Fingers crossed its not too raspy or ill b throwing some hfc's in it.
      it will be raspy(unless yours is turboed) and you will loose some power
      Art
      WWW.JoshCoons.blogspot.com
      Music
      http://www.mixcloud.com/BossFight/
      Retired: 04 r32 turbo, 04 Audi tt 225, 04 r32 bmp, 07 audi Rs4

    7. Member
      Join Date
      May 30th, 2006
      Location
      Mesa, Arizona
      Posts
      2,164
      Vehicles
      '04 R32 w/ HPA FT400 w/ UM tune - '95GTIVR6 - '02 TTQuattro
      10-04-2012 03:29 PM #7
      Quote Originally Posted by Khunez View Post
      it will be raspy(unless yours is turboed) and you will loose some power
      That's just great, what we're looking for, a loss of power.

    8. Member r32dub88's Avatar
      Join Date
      Dec 9th, 2007
      Location
      NH
      Posts
      2,304
      Vehicles
      BMP Golf, F-150
      10-04-2012 03:29 PM #8
      its been a while since i read over those debates but from what i remember on a NA car test pipe adds about 2-3 hp but you lose about 15 ft lbs of tq. Hope this helps

    9. Member Khunez's Avatar
      Join Date
      Feb 27th, 2009
      Location
      Austin TX
      Posts
      1,583
      Vehicles
      2012 Golf R
      10-04-2012 07:30 PM #9
      ^this is true.
      Search powerdubs topics. He has put this car to the test in every NA combination.

      Also I hear good things about adding a resonator to the set up to tune the sound.
      Art
      WWW.JoshCoons.blogspot.com
      Music
      http://www.mixcloud.com/BossFight/
      Retired: 04 r32 turbo, 04 Audi tt 225, 04 r32 bmp, 07 audi Rs4

    10. Member Draxus's Avatar
      Join Date
      Jan 6th, 2009
      Location
      Seattle, WA
      Posts
      2,413
      Vehicles
      MKIV DBP .:R32
      10-05-2012 12:46 AM #10
      As someone who had no cats for 4 months then welded in highflow cats I can tell you this :

      - W/O sounds like ass
      - W/O you lose low end
      - W/O you do not gain high end


      No cats is just ****ing dumb.
      Quote Originally Posted by BlownR View Post
      I have seen several open slots, usually after tequila. Wait, I think that's different.
      MKIV DBP .:R32 | Photo Gallery
      Projects | Custom Exhaust : It Begins | Solid MKIV Sub-Frame Mounts ||Build Journal| Draxus's GoKart

    11. Member EIPtuningR32's Avatar
      Join Date
      May 3rd, 2008
      Location
      Gainesville, FL
      Posts
      1,559
      Vehicles
      2004 VW .:R32, 1982 Porsche 928S Euro, 1923 Ford T-Bucket, 1962 VW Myers Manx (sold), 2000 Trans Am
      10-05-2012 03:35 AM #11
      dude... you dont lose power. You lose torque down low, but it pulls a little better up top. Its just one more modification that specifies where you want your power.

      Edit** Yes, it is raspy, but on WOT its awesome.

      This is a USP test pipe and an EIPtuning competition series exhaust


      same car, more video:
      Last edited by EIPtuningR32; 10-05-2012 at 03:38 AM.

    12. Member v2.'s Avatar
      Join Date
      Oct 18th, 2007
      Location
      Johnson City, TN
      Posts
      7,863
      Vehicles
      MKIV R32
      10-05-2012 10:58 AM #12
      Quote Originally Posted by Draxus View Post
      As someone who had no cats for 4 months then welded in highflow cats I can tell you this :

      - W/O sounds like ass
      - W/O you lose low end
      - W/O you do not gain high end


      No cats is just ****ing dumb.
      Exactly what I wanted to know. Thanks.
      Quote Originally Posted by VincewagenR32 View Post
      Torque is a motherf***er

    13. Member BOUDAH's Avatar
      Join Date
      Aug 15th, 2008
      Location
      Albany, New York
      Posts
      11,478
      Vehicles
      BMP .:R32 Supercharged , '13 CC (POS)
      10-05-2012 11:36 AM #13
      Quote Originally Posted by v2. View Post
      Exactly what I wanted to know. Thanks.
      Yeah when u remove the cats, u cap out TQ unless you have a turbo. If u have a turbo, **** it make it a 5 " straight pipe
      Instagram- @eboudah

    14. Member Budgeezer's Avatar
      Join Date
      Apr 7th, 2005
      Location
      Edina, MN
      Posts
      1,164
      Vehicles
      TR R32T, Surly 1x1 Fixed
      10-05-2012 04:25 PM #14
      EIP Street Series, usp test pipe, magnaflow HFC's in car footage.

      RA 2012 from Paul Anderson on Vimeo.


    15. Member jampy's Avatar
      Join Date
      Nov 19th, 2010
      Posts
      123
      Vehicles
      mk4 r32/93 gsi16v
      10-05-2012 07:31 PM #15
      i found this in old thread,i think is a good example as the test pipe work well,i run with no cats 1year ago and the car loss torque in low..yes this is true but have great top end power imo..i tested this between 2 points in a road,with stock cats put 188km/h and at the same point with no cats put 195km/h,test pipe works! just another way to make power. .
      http://forums.vwvortex.com/showthrea...test+pipe+dyno

    16. Member
      Join Date
      Mar 4th, 2012
      Location
      NJ
      Posts
      368
      Vehicles
      2002 Audi TT ALMS Edition (Avus silver), 2006 350z, 2009 Dodge Caliber SRT4
      10-06-2012 01:56 PM #16
      I have supersprint resonated test pipes mated to a resonated milltek on my girl's 3.2TT and felt no loss of low end power and def a gain in the midrange and top. Tuned by Eurotech Motorsports in Mahwah, NJ with APR Stage 2 software. Other mods include Modshack VDTA intake. Sounds great.

      Last edited by Kacz07; 10-06-2012 at 02:12 PM.

    17. Member v2.'s Avatar
      Join Date
      Oct 18th, 2007
      Location
      Johnson City, TN
      Posts
      7,863
      Vehicles
      MKIV R32
      10-06-2012 05:08 PM #17
      what about a combination of both? A test pipe with a HFC welded in.
      Quote Originally Posted by VincewagenR32 View Post
      Torque is a motherf***er

    18. Member jampy's Avatar
      Join Date
      Nov 19th, 2010
      Posts
      123
      Vehicles
      mk4 r32/93 gsi16v
      10-07-2012 03:29 AM #18
      Quote Originally Posted by Kacz07 View Post
      I have supersprint resonated test pipes mated to a resonated milltek on my girl's 3.2TT and felt no loss of low end power and def a gain in the midrange and top. Tuned by Eurotech Motorsports in Mahwah, NJ with APR Stage 2 software. Other mods include Modshack VDTA intake. Sounds great.

      you have a pm..

    19. Member LIFE.:R's Avatar
      Join Date
      Mar 11th, 2012
      Location
      St.Augustine,Fl.
      Posts
      550
      Vehicles
      2004 vw R32
      10-10-2012 12:12 PM #19
      If a testpipe was retro'ed to a HFC. Would 2 HFCs(like stock pipe) be more adequate than just one on the end? I've seen both, which is more affective?

    20. 10-18-2012 04:17 PM #20
      MK4 with TT test pipe and C2-Step software. Dyno graph, drive by and launch:

      http://www.rennenparts.com/index.php...-Software.html

      Dyno:


      Drive-By:


      Launch:

    21. Member v2.'s Avatar
      Join Date
      Oct 18th, 2007
      Location
      Johnson City, TN
      Posts
      7,863
      Vehicles
      MKIV R32
      10-20-2012 10:46 AM #21
      Quote Originally Posted by FalmouthMK5 View Post
      MK4 with TT test pipe and C2-Step software. Dyno graph, drive by and launch:

      http://www.rennenparts.com/index.php...-Software.html

      Dyno:


      Drive-By:


      Launch:
      The drive by sounds great!
      Quote Originally Posted by VincewagenR32 View Post
      Torque is a motherf***er

    22. Member CEL is On's Avatar
      Join Date
      Jul 9th, 2010
      Location
      Virginia Beach
      Posts
      2,460
      10-20-2012 11:15 AM #22
      ^^ Stock exhaust with those TT test pipes?
      2004 .:R32 | VR Alliance #123 | BFC Retrofits | Auto Elite |

    23. Member jampy's Avatar
      Join Date
      Nov 19th, 2010
      Posts
      123
      Vehicles
      mk4 r32/93 gsi16v
      10-20-2012 02:13 PM #23
      yes,oem catback with tt testpipe,as i said the test pipe works! and with sport catback the gains are much better.

    Posting Permissions

    • You may not post new threads
    • You may not post replies
    • You may not post attachments
    • You may not edit your posts
    •