Engine Drivetrain 1st Gen Cooper S Most liked posts in thread: (Please help)no cat problems

  1. Chad

    Chad New Member

    Sep 29, 2014
    6
    2
    0
    Ratings:
    +2 / 0 / -0
    #3 Chad, Oct 2, 2014
    only reason I ask about the power loss with having no cat is I heard supercharged cars need restriction and i didn't know if a muffler and a resonator was enough restriction.

    But that's best your right I'll contact jan see what he says!
    Thanks alot MRNTD!
     
  2. MCS02

    MCS02 Moderator
    Staff Member Articles Moderator Supporting Member

    Jul 31, 2009
    11,305
    6,277
    113
    Male
    Ratings:
    +8,070 / 10 / -3
    #4 MCS02, Oct 2, 2014
    Doggone it!!! I thought I was finely going to get rid of some of our cats!:lol:
     
  3. mrntd

    mrntd Well-Known Member
    Supporting Member

    Sep 30, 2011
    5,083
    1,762
    113
    Male
    Sales and Marketing manager
    Hilliard, Ohio
    Ratings:
    +1,763 / 0 / -0
    #2 mrntd, Oct 2, 2014
    The lack of cats won't cause a power but the computer might. If the car thinks its not running right because of the second O2 sensor is missing then you could have a power loss.

    Best thing is to contact Jan and ask if he set something up in the tune to take care of it.
     
  4. Da_Ghost

    Da_Ghost New Member

    May 17, 2014
    4
    5
    0
    Ratings:
    +5 / 0 / -0
    #5 Da_Ghost, Oct 4, 2014
    On a s/c car, you don't really need any restriction. You want a decent sized exhaust tho. No point in dumping into a 4" exhaust if the engine isn't pushing enough to actually fill it. You could even lose a bit of power from going too big.

    Turbos need a bit of restriction up front, but once it's passed the turbo, it's better for it to be as free-flowing as possible.