vtr exhaust

1. 355858 Frequent Poster Joined: Jun 2006 Norwich Posts: 730 Saxo VTR Mk2 Wicked Red - Suzuki jimny soft top

   #1 17th March 2007, 22:35

   can i get a good exhaust system that will improve my mk2 vtr, don't want anything loud just for performance..
   
   i also want to keep the cat for MOT
   
   can i have a straight through pipe if i still have the cat?? and what manifold should i get so i dont have to modify much as i've heard loads about moving the oil filter?
2. sim69er South Wales Joined: Jan 2005 The Valley's init Posts: 3601 vtr mk2

   #2 17th March 2007, 23:21

   if you want performance go for something like magnex or piper however im one of those that rate custom exhuasts, you would just have to go for a cat back system or you can have a system with an interchangable decat pipe as you can put the cat back in for mot time if you decat as well as exhaust you will see more of a gain
3. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

   #3 17th March 2007, 23:24

   99% of custom exhausts will kill performance not improve it.
4. sim69er South Wales Joined: Jan 2005 The Valley's init Posts: 3601 vtr mk2

   #4 17th March 2007, 23:27

   mine didnt so i have to disagree on that one or maybe im the 1% lol altho have seen some shocking custom exhuats mind 90 degree bends!!!
5. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

   #5 17th March 2007, 23:29

   what proof have you got? where did you get it made?
   
   to prove it made a difference you will of had your car rolling roaded, then in same day ahve exhaust fitted an tested on same rollers?
6. sim69er South Wales Joined: Jan 2005 The Valley's init Posts: 3601 vtr mk2

   #6 17th March 2007, 23:33

   the rolling road results, my car is the 90bhp standard engine, longlife exhausts made it for me in cardiff
7. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

   #7 17th March 2007, 23:34

   was it rolling roaded before it was fitted on the same day and on the same rollers? if not then dont take rolling road results too serious.
8. sim69er South Wales Joined: Jan 2005 The Valley's init Posts: 3601 vtr mk2

   #8 17th March 2007, 23:37

   no it wasnt and im not, im just saying for people not to slate custom exhausts straight away as some of them are pritty good
9. tweeqd Established Member Joined: Mar 2006 Farnham Surrey Posts: 1542 AX GT 16v turbo 6 speed with NOS 205 gti6 E 320

   #9 17th March 2007, 23:38

   Quote:

   Originally Posted by williamsvts 99% of custom exhausts will kill performance not improve it.

   Janspeed custom made mine and its miles better than an off the shelf jobby
10. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

    #10 17th March 2007, 23:39

    its the way customs are bent though. yes the quality and build of them can be very good but they tend to be bent so they get thinner at the bends. this can slow exhaust gasses, cause turbulance in gasses and at worst reverse them slightly.
11. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

    #11 17th March 2007, 23:40

    im not on about janspeed. im on about powerflow and the like. janspeeds are well made and bent properly.
12. sim69er South Wales Joined: Jan 2005 The Valley's init Posts: 3601 vtr mk2

    #12 17th March 2007, 23:46

    longlife mandrel bend theres well the cardiff branch do
13. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

    #13 17th March 2007, 23:53

    good stuff. you fit into the 1% then
14. sim69er South Wales Joined: Jan 2005 The Valley's init Posts: 3601 vtr mk2

    #14 18th March 2007, 00:29

    yep i do
15. D34no Regular Poster Joined: Feb 2007 cheshire, winsford Posts: 493 VTS track car, vtr

    #15 18th March 2007, 21:43

    Brand - 'Cat' Removed - Power Gain+/Loss- Torque Gain+/Loss-
    Powerflow- NO- +4.4bhp +1.4 ft/lb
    Ashley- YES- +4.4bhp +1.2 ft/lb
    Magnex- NO- +3.2bhp -1.4 ft/lb
    Scorpion- YES- +3.2bhp -0.4 ft/lb
    Janspeed- NO- +2.9bhp -0.5 ft/lb
    Devil- YES- +2.9bhp -0.5 ft/lb
    Milltec- NO- +2.7bhp +1.9 ft/lb
    Mongoose NO -1.4bhp +0.3 ft/lb
    
    these are all tested on a VTR
16. Steve Saxperience Hardcore! Joined: Mar 2005 Newcastle Upon Tyne Posts: 19910 CW Honda Integra DC5

    #16 18th March 2007, 21:47

    Quote:

    Originally Posted by D34no Brand - 'Cat' Removed - Power Gain+/Loss- Torque Gain+/Loss- Powerflow- NO- +4.4bhp +1.4 ft/lb Ashley- YES- +4.4bhp +1.2 ft/lb Magnex- NO- +3.2bhp -1.4 ft/lb Scorpion- YES- +3.2bhp -0.4 ft/lb Janspeed- NO- +2.9bhp -0.5 ft/lb Devil- YES- +2.9bhp -0.5 ft/lb Milltec- NO- +2.7bhp +1.9 ft/lb Mongoose NO -1.4bhp +0.3 ft/lb these are all tested on a VTR

    copied from maxpower, or halfords cat by any chance? actually its on the powerflow site aswel!
    
    That depends highly on where its made and who does it, as there is some shitty powerflow centres so i read.
17. D34no Regular Poster Joined: Feb 2007 cheshire, winsford Posts: 493 VTS track car, vtr

    #17 19th March 2007, 17:28

    yea its from powerflow is just a general ideal of exhaust systems!
18. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

    #18 19th March 2007, 23:34

    no way imo will a powerflow make the most power.