DIY Resonator Delete (Si Sedan)

Discussion in 'Intake & Exhaust DIY' started by Smokeditty, Jun 28, 2012.

  1. Smokeditty

    Smokeditty Well-Known Member

    Messages:
    10
    Location:
    Aviano, Italy
    Vehicle Model:
    Civic Si
    Body Style:
    Sedan
    Here is a DIY for a resonator delete I did on my 2012 Si sedan.

    Tools needed:
    -Jack
    -Jack stand
    -4 way lug nut tool
    -Socket wrench
    -10mm socket
    -Flat head screwdriver

    1. Loosen lug nuts slightly
    2. Jack up car
    3. Slide jack stand under and lower car on jack stand (keep slight jack pressure under car, I do this to keep 2 points of contact)
    4. Remove wheel
    5. Use flat head to gently pry the middle piece of the 2 plastic retainers and fold the flap down. Where the green arrow is pull the little tab out of the wheel well shield
    [​IMG]

    6. Gently pry all of the middle pieces from the rest of the retainers in wheel well shield (do not pull out the 3 that are x'd in red). I didn't get a pic but there are 3 more retainers that you need to remove under the bumper. Then fold the shield under the brake disc.
    [​IMG]

    7. Remove the 2 10mm bolts
    [​IMG]

    8. Remove the 2 retainers from the "snorkel"
    [​IMG]

    9. Remove "snorkel" from resonator box
    [​IMG]

    10. Remove 10mm bolt hidden behind the plastic piece
    [​IMG]

    11. Wiggle resonator out and down
    [​IMG]


    12. Here is what's left. Holy ground wires!
    [​IMG]

    13. These are the parts you should have left over.
    [​IMG]

    14. Replace the wheel well shield and the shield that covers the intake tube.
    15. Put tire back on and lower car.
     
  2. MrsJrotax101
    • Staff
    • Supporting Member

    MrsJrotax101 Administrator

    Messages:
    25,496
    Wow! Thanks for posting this. Looks great :D
     
  3. KennyGS

    KennyGS How may I help?

    Messages:
    11,644
    Location:
    Keystone State
    Well done! :clapping:
     
  4. webby
    • Staff
    • 2019 Toys For Tots

    webby Administrator

    Messages:
    50,879
    great photos & writeup - thank you for posting :)
     
  5. Bob-blehead

    Bob-blehead Well-Known Member

    Messages:
    224
    Location:
    Midland, MI
    Vehicle Model:
    Civic
    Body Style:
    EX Sedan
    Does removing the resonator cause any monitor lights to go off?
     
  6. webby
    • Staff
    • 2019 Toys For Tots

    webby Administrator

    Messages:
    50,879
  7. 12civic5speed

    12civic5speed Well-Known Member

    Messages:
    371
    Location:
    Johnson City Tennessee
    Vehicle Model:
    2012 Civic EX
    Body Style:
    Coupe
    what is the point of this? is it on a r18?
     
  8. webby
    • Staff
    • 2019 Toys For Tots

    webby Administrator

    Messages:
    50,879
    sawthetha likes this.
  9. mongoose221

    mongoose221 Well-Known Member

    Messages:
    406
    Location:
    middletown, NY
    on the DIY random question, do i need to discon battery, wait 15 min, let idle for 10 min after reconnect or no?
     
  10. shiftingearz

    shiftingearz Well-Known Member

    Messages:
    35
    Location:
    North Jersey
    Vehicle Model:
    Civic Si
    Body Style:
    Coupe
    Is anyone worried about getting water sucked up through the intake after doing this? I'm just curious, it looks kinda low.
     
  11. 2000GM

    2000GM Well-Known Member

    Messages:
    70
    Location:
    S.E. MA
    Vehicle Model:
    Civic Si
    Body Style:
    Coupe
    I just did this on my Si Coupe. There were 2 differences I ran into vs. the sedan.

    1) The coupe has a phillips head screw near the seam between the bumper cover and front fender, which you have to remove because it holds the liner in place. It has one of those cheap metal clips that pop onto the edge of the liner, and the screw passes through it to the threads on the backside. I wasn't ready for it to be there so it fell when I pulled the liner back, but luckily I saw it land so I didn't lose it.

    2) I couldn't get the front of the liner completely free. There's a few different plastic pieces that all meet together under the front bumper/air dam and I assume there were more push-pin fasteners I couldn't see or maybe it sort of "clipped" into something else under there. However it was out of the way enough to still easily maneuver the resonator sections out so I didn't bother trying harder to find where it was still hung up.

    That area where the intake is now open really is pretty protected, once the wheel liner is back in place. The first time I drive it in bad rain I'm gong to make sure the air filter and housing aren't wet. Going through deep puddles could be a realistic concern though. However, by my estimation you'd have to be trying to get through about a 10 inch deep puddle to have water reach it.

    I feel no power difference but then I expected nothing anyways. I previously popped out the 2 pieces right before the airbox, just to get a feeling for how an aftermarket short ram might sound. I liked it but it was a bit too loud for me, and the noise was sort of "whooshier" (nice word, lol) and more than anything else, just made it sound like the engine was laboring hard. It wasn't a "nice" sound, IMHO, and I didn't intend to leave it long because it was just sucking in under-hood air. Now with those pieces back in, and the resonator removed, I'm very happy with the sound. Not much louder that stock, just a more pleasant, throatier growl in the upper RPMs. I saved everything so it will take me 20 minutes to put the resonator back in place if I decide to.
     
    Nefertiti_Civi and webby like this.
  12. 2000GM

    2000GM Well-Known Member

    Messages:
    70
    Location:
    S.E. MA
    Vehicle Model:
    Civic Si
    Body Style:
    Coupe
    Hmm, strange I can't go back and edit my post above. I wanted to add that the insides of the resonator are very smooth with nothing to really impeed air flow, other than the direction changes. I highly doubt any measurable power is made by removing it, as much as we'd love to think it does. It just makes it a little nicer to listen to :)
     
  13. webby
    • Staff
    • 2019 Toys For Tots

    webby Administrator

    Messages:
    50,879
    you could replace your stock filter for a k&n drop in filter for a little gain
     
    Nefertiti_Civi and veech_fg4 like this.
  14. mark magnaan

    mark magnaan Well-Known Member

    Messages:
    82
    why do you remove resonator? what is resonator for? what do we get from removing it? thanks!
     
  15. James Dearborn

    James Dearborn Well-Known Member

    Messages:
    8
    Location:
    Fort Hood, Texas
    Vehicle Model:
    Civic SI
    Body Style:
    Sedan
    Just finished my delete!!
     
  16. S2KJAY

    S2KJAY Well-Known Member

    Messages:
    218
    Location:
    Orlando
    Vehicle Model:
    Honda Civic SI
    Body Style:
    coupe
    Its there to lower sound levels from the factory. By removing it, you simply here air intake directly from the filter... that's it..
     
  17. mark magnaan

    mark magnaan Well-Known Member

    Messages:
    82

    ok thanks! so it is more for the ear.. more of a music.. :)
     
    Michal006 likes this.
  18. V_Kam

    V_Kam Well-Known Member

    Messages:
    105
    Location:
    Detroit
    Vehicle Model:
    Civic SI
    Body Style:
    4-door
    Great DIY post. K&N air filter is a must if you do this. Ive driven threw some heavy rains and puddles. Checked the filter and it was bone dry.
    Safe, fun and simple mod.
     
  19. Mdean7400

    Mdean7400 Well-Known Member

    Messages:
    53
    What do you guys think about doing the res delete if you live in Florida? Where this is no hills and rains a lot.
     
  20. webby
    • Staff
    • 2019 Toys For Tots

    webby Administrator

    Messages:
    50,879
    it's probably 10-12 inches from the ground, so it shouldn't be an issue unless you're driving through a lot of water.
     

Share This Page