Help - Choosing Exhaust Size

Discussion in '8G Lancer - Performance' started by spiderman671, Nov 4, 2007.

  1. spiderman671

    spiderman671 Guest

    So I am going to be heading down to the shop next week or so to get my new exhaust system. And it's going to be the same one from the video I showed you guys. HKS Hi-Power Catback Exhaust.

    They got 2 different sizes for the exhaust, but I don't know what's what. So if any one here has any idea on this, I would like input on which is the better one to get. (Based on Performance & Sound).

    If you don't know which video I'm talking about, here's the link
    http://youtube.com/watch?v=80lc6reWEnI

    and NO, it's not set up with a turbo! It's already been cleared. It's a 5-spd. Lancer DE. No Mods. Just the exhaust

    A: 170mm Shell Tip - 120mm Tip Diameter - 75mm Piping Diameter

    -- OR --

    B: 130mm Shell Tip - 96mm Tip Diameter - 60mm Piping Diameter
     
  2. angryGTS

    angryGTS Well-Known Member

    If you plan on turbo charging in the future go with the 75mm piping, if you plan to stay NA than do the 60mm
     
  3. angryGTS

    angryGTS Well-Known Member

    if you go too big in diameter and stay NA, then you will lose too much backpressure and some low end power
     
  4. Zeni

    Zeni Active Member

    its 5speed
     
  5. kinkbmxrydr

    kinkbmxrydr Guest

    actually that guys car is 5spd to let you know
     
  6. Zeni

    Zeni Active Member

    i have an sp2 i feel as if its perfect doesnt look like a giant cannon and it has a stock looking tip :D

    its just a tad bit bigger
     
  7. Killface

    Killface Well-Known Member

    Nicley done getting the HKS exhaust! Post up some videos after you get it installed.
     
  8. spiderman671

    spiderman671 Guest

    alright thanks for the input peoples.

    and thanks for the correction. it's been edited to, 5-spd :)
     
  9. Zeni

    Zeni Active Member

    so whatsize are you going with?
     
  10. stefanBounket

    stefanBounket Member

    how big of a difference does piping make?

    If its for air pressure etc... then if you get a turbo a smaller pipe would be more pressure no? or is the turbo too much for that size of piping?

    (referring to angryGTS' comments)
     
  11. delphium_

    delphium_ Well-Known Member

    BUMP

    i'd like to have this question answered too..
     
  12. lancered

    lancered Well-Known Member

    exhaust size has been discussed before.2.5 inch exhaust would be the biggest youd want to go on NA,every aftermarket exhaust you see is 2.5.and even with the RRM turbo this would be good size since its looking like a low boost kit,some one on here said if you start uping the boost for turbo more than 10psi,then youd want to go with 3 inch.
     
  13. delphium_

    delphium_ Well-Known Member

    So does that go for axel back too? after the last cat?
    or what
     
  14. lancered

    lancered Well-Known Member

    depends on what you want and what the application needs
     
  15. testpilotx15

    testpilotx15 Well-Known Member

    God I wish the term backpressure could be deleted from people's vocabulary. Backpressure is a very bad thing, you do not want it, however you do need to maintain exhaust gas velocity, which you'd lose with piping that's too big, they are totally different things.
     
  16. BigSteve

    BigSteve Well-Known Member

    go with the bigger piping if u wanna go turbo.. if ur gonna stay NA then go with the smaller piping.
     
  17. Redline1

    Redline1 Well-Known Member

    2.5 on my hks hi power muffler