Loss of power?

  1. Established Member Joined: Jun 2006 Wales Posts: 1486 1)2002 Saxo VTR 2)2003 106 GTI
    #1
    I have recently put a GMC 4-1 manifold on my VTR! I like the sound of it, but I have been told if I take the centre silencer off it wil make it a bit louder! However someone else told me, if I do this i will loose power! Is this right? I have a Magnex system by the way!
  2. Saxperience Forum Bum Joined: Mar 2007 Bath/Warminster Posts: 2616 57 plate C2 VTS & a saxo 1.4
    #2
    If you start taking out too many boxes from the exhaust, you will loose a lot of back pressure. Which will loose power.

    If I am wrong, I am sure someone will correct me
  3. Established Member Joined: Jun 2006 Wales Posts: 1486 1)2002 Saxo VTR 2)2003 106 GTI
    #3
    Must be right as thats what I have been told!
  4. Saxperience Forum Bum Joined: Mar 2007 Bath/Warminster Posts: 2616 57 plate C2 VTS & a saxo 1.4
    #4
    Ahh brilliant .

    Bud how much was your GMC manifold? I am thinking about getting one next week when I get paid
  5. Super Moderator Joined: Mar 2003 Durham (England) Posts: 37932 1. AX 2. Mk2 Saxo VTR 3. MK4 R32 DBP
    #5
    been looking at them today there 230 on the site without VAT and delivery squills said about 300 delivered which i think is quite reasonable

    if you make it to loud your gonna start annoying people and getting pulled
  6. Established Member Joined: Jun 2006 Wales Posts: 1486 1)2002 Saxo VTR 2)2003 106 GTI
    #6
    Yeah true! It cost me something like a tiny bit over £300, thats with VAT, delivery and the lambda sleeve!
  7. Super Moderator Joined: Mar 2003 Durham (England) Posts: 37932 1. AX 2. Mk2 Saxo VTR 3. MK4 R32 DBP
    #7
    o yeah forgot the lambda sleeve, just ask yourself what do you want in your car performance or noise
  8. Saxperience Forum Bum Joined: Mar 2007 Bath/Warminster Posts: 2616 57 plate C2 VTS & a saxo 1.4
    #8
    Tis all about performance pred .

    £300 is a bit much than what I wanted to spend on a manifold. Maybe a raceland one .

    Btw predator bud, I just ordered some suede for my doorcards. Hopefully I will start on them soon.
  9. Established Member Joined: Jun 2006 Wales Posts: 1486 1)2002 Saxo VTR 2)2003 106 GTI
    #9
    Quote:
    Originally Posted by Predator_VTR View Post
    o yeah forgot the lambda sleeve, just ask yourself what do you want in your car performance or noise
    Would like both but definately performance! Just gotta get an enclosed induction then I shud be all sorted! Then maybe cams and remap for the summer!
  10. Saxperience Forum Bum Joined: Mar 2007 Bath/Warminster Posts: 2616 57 plate C2 VTS & a saxo 1.4
    #10
    Quote:
    Originally Posted by Squills_Saxo View Post
    Would like both but definately performance! Just gotta get an enclosed induction then I shud be all sorted! Then maybe cams and remap for the summer!
    Ooo cams on a VTR. I haven't seen that done before.
  11. Established Member Joined: Jun 2006 Wales Posts: 1486 1)2002 Saxo VTR 2)2003 106 GTI
    #11
    Sorry meant to say cam!
  12. Super Moderator Joined: Mar 2003 Durham (England) Posts: 37932 1. AX 2. Mk2 Saxo VTR 3. MK4 R32 DBP
    #12
    lol yeah think your car performance wise is gonna be the exact same as mine lol
  13. Saxperience Forum Bum Joined: Mar 2007 Bath/Warminster Posts: 2616 57 plate C2 VTS & a saxo 1.4
    #13
    Would a cam'ed VTR keep up with a standard VTS then? Surely it would.

    I would love to do proper engine mods on my 1.4, but so many people have told me I should not waist my money on a small engine that its now starting to take effect :O
  14. Established Member Joined: Jun 2006 Wales Posts: 1486 1)2002 Saxo VTR 2)2003 106 GTI
    #14
    Quote:
    Originally Posted by Vinny_VSX View Post
    Would a cam'ed VTR keep up with a standard VTS then? Surely it would.

    I would love to do proper engine mods on my 1.4, but so many people have told me I should not waist my money on a small engine that its now starting to take effect :O
    Not sure tbh mate! Would be nice if it did!
  15. Saxperience Forum Bum Joined: Mar 2007 Bath/Warminster Posts: 2616 57 plate C2 VTS & a saxo 1.4
    #15
    Quote:
    Originally Posted by Squills_Saxo View Post
    Not sure tbh mate! Would be nice if it did!
    Pretty sure it would. Otherwise it would be cheaper to buy a VTS lump. But that way, it isn't as much fun
  16. Established Member Joined: Jun 2006 Wales Posts: 1486 1)2002 Saxo VTR 2)2003 106 GTI
    #16
    Quote:
    Originally Posted by Vinny_VSX View Post
    Pretty sure it would. Otherwise it would be cheaper to buy a VTS lump. But that way, it isn't as much fun
    Yep, I agree with you there!
  17. Saxperience Forum Bum Joined: Jan 2006 Banbury Posts: 4623 Saxo Rally Car Evo 6
    #17
    Yer you loose back pressure etc and spoil the Sound pressure waves and scavenging effect.

    But if you get a straight through, you shift all the power up the rev range and loose some bottom end poke.

    No harm as why do you buy a 4-1 and all the other mods?

    To go faster.

    And how do go faster?

    You rev the car high!
  18. Saxperience Forum Bum Joined: Feb 2005 Near St Andrews Fife Posts: 4631 Saxo Westcoast (sold) mr2 turbo
    #18
    300 seems alot for a gmc manifold. i paid 230 for my one delivered
  19. Regular Poster Joined: Mar 2007 Grimsby,UK Posts: 260 1st. Pug 106 Current. Saxo vtr
    #19
    i got told by a bloke who i work with that the center box on saxo is just a resinator that just cuts the noise down wen standard and is basicly straight through, so i would think that it wouldnt effect back pressure and not loose power, he did work at a citroen garage for a few years so just took his word but not sure, might look into it !
  20. Saxperience Post Whore Joined: Jan 2007 Posts: 7705 Saxo VTS
    #20
    My exhaust has a cat, then no boxes until the backbox and seems fine...
  21. Super Moderator Joined: Mar 2003 Durham (England) Posts: 37932 1. AX 2. Mk2 Saxo VTR 3. MK4 R32 DBP
    #21
    yeah a cammed VTR should keep up with a standard VTS