1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Straight pipe with a tip

Discussion in 'Prius c Accessories and Modifications' started by papafern, Aug 26, 2018.

  1. papafern

    papafern Junior Member

    Joined:
    Mar 1, 2018
    61
    9
    0
    Location:
    NYC
    Vehicle:
    2015 Prius c
    Model:
    One
    I went to a hood muffler shop today just to look and ask about putting an exhaust on my Prius C. I had read that the Fiat 500 abarth doesn't have a muffler. It sounds good and not too loud because the engine is so small. So I asked the mechanic if it's possible to do this on the Prius and he said yes. While I was there's they were doing just that to a BMW X5 and to an Accord. What problems can it cause on the car??? Will it still work properly??? Any warning lights gonna go off??? What could go wrong???
     
    #1 papafern, Aug 26, 2018
  2. sam spade 2

    sam spade 2 Senior Member

    Joined:
    Mar 31, 2018
    7,035
    2,782
    0
    Location:
    USA
    Vehicle:
    2017 Prius c
    Model:
    Four
    Do you have mandatory emissions or safety inspections where you live ??
    If so, that might end up being a costly mistake.

    And the Prius has an engine that is a bit different.
    I've only seen a couple with modified exhausts and both sounded like a sick lawn mower.
     
    #2 sam spade 2, Aug 26, 2018
    Last edited: Aug 26, 2018
    Starship16 likes this.
  3. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,703
    38,242
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Aren't you supposed to give up on stuff like this once you're out of your twenties? ;)
     
    #3 Mendel Leisk, Aug 26, 2018
  4. JimboPalmer

    JimboPalmer Tsar of all the Rushers

    Joined:
    Apr 14, 2009
    12,470
    6,862
    2
    Location:
    Greenwood MS USA
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    Pro
    1) It will be louder and annoy your neighbors.

    Con
    1) Fuel Economy will suffer
    2) Power will suffer
    3) The noise will be really inconsistent as the engine turns off frequently.
    4) Putting it all back to pass inspection will be expensive. Really expensive if you don't keep all the stock parts. (you can't certify an aftermarket Cat in NYS.
     
    #4 JimboPalmer, Aug 26, 2018
    roadrunner, Starship16 and Mendel Leisk like this.
  5. papafern

    papafern Junior Member

    Joined:
    Mar 1, 2018
    61
    9
    0
    Location:
    NYC
    Vehicle:
    2015 Prius c
    Model:
    One
    Lol. Nah, u only get old when u stop doing young people things
     
    #5 papafern, Aug 26, 2018
    olftboy, ztanos and Mendel Leisk like this.
  6. papafern

    papafern Junior Member

    Joined:
    Mar 1, 2018
    61
    9
    0
    Location:
    NYC
    Vehicle:
    2015 Prius c
    Model:
    One
    How come fuel economy will suffer???

    Florida plates, no inspection. And if I needed a NYS inspection, I know people, lol. I also ride scooters. I look like a circus bear on it. So I like doing ridiculous things. I'm worried about making the engine less reliable or things not working right because of this.
     
    #6 papafern, Aug 26, 2018
    Mendel Leisk likes this.
  7. Starship16

    Starship16 Senior Member

    Joined:
    Jun 8, 2018
    1,348
    1,453
    0
    Location:
    Beach Christmas
    Vehicle:
    2016 Prius
    Model:
    ----USA----
    LOL!!!! :ROFLMAO: :D
     
    #7 Starship16, Aug 26, 2018
  8. JimboPalmer

    JimboPalmer Tsar of all the Rushers

    Joined:
    Apr 14, 2009
    12,470
    6,862
    2
    Location:
    Greenwood MS USA
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    This is not an Otto cycle engine. The compression ratio is about 8 to 1, while the expansion ratio is about 13 to 1, so little more expansion happens outside the cylinder. So a straight pipe is just about noise.

    A straight pipe will have no oxygen sensors, so the electronics will have no way to tune engine for perfect fuel to air ratio. (called closed loop) The electronics will used a preprogammed table to guess the perfect fuel air ratio and so reduce both economy and performance. (Open loop, in worst case called Limp Home mode)

    Open/Closed Loop Operation

    (This page is going to use Tuned Port Injection as TPI with defining it)
     
    #8 JimboPalmer, Aug 26, 2018
    Starship16 likes this.
  9. papafern

    papafern Junior Member

    Joined:
    Mar 1, 2018
    61
    9
    0
    Location:
    NYC
    Vehicle:
    2015 Prius c
    Model:
    One
    The oxygen sensors are in the muffler??? What I saw the guys are the shop doing is cutting the pipe right before the muffler, then welding in a piece that is the about same length as the muffler was and welding a tip on it.
     
    #9 papafern, Aug 26, 2018
  10. JimboPalmer

    JimboPalmer Tsar of all the Rushers

    Joined:
    Apr 14, 2009
    12,470
    6,862
    2
    Location:
    Greenwood MS USA
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    #10 JimboPalmer, Aug 26, 2018
  11. papafern

    papafern Junior Member

    Joined:
    Mar 1, 2018
    61
    9
    0
    Location:
    NYC
    Vehicle:
    2015 Prius c
    Model:
    One
    Yeah, a muffler delete. The Fiat 500 Abarth comes from the factory without a muffler. It still has all the emission hardware. That's how I had the idea. I read that the engine is so small on the Abarth so it doesn't make too much noise and get a pass from the governmemt without a muffler. I was thinking that the C wouldn't be too loud because of the same reason. I'm worried that it will have negative effects on the engine because it's not an Otto cycle engine so it's different.
     
    #11 papafern, Aug 27, 2018
  12. JimboPalmer

    JimboPalmer Tsar of all the Rushers

    Joined:
    Apr 14, 2009
    12,470
    6,862
    2
    Location:
    Greenwood MS USA
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    If you are leaving the pollution controls in place, getting keyed by angry neighbors is your main worry.

    Pro loud exhaust
    Con loud exhaust
     
    #12 JimboPalmer, Aug 27, 2018
    Sezy likes this.
  13. fotomoto

    fotomoto Senior Member

    Joined:
    Apr 22, 2009
    5,597
    3,771
    0
    Location:
    So. Texas
    Vehicle:
    Other Hybrid
    I would think the exhaust note would just sound weird on a CVT drivetrain as the drone would be even more pronounced.
     
    #13 fotomoto, Aug 27, 2018
    Starship16 likes this.
  14. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,703
    38,242
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Ok, I haven't trotted this out in a while:

     
    #14 Mendel Leisk, Aug 27, 2018
    ztanos likes this.
  15. papafern

    papafern Junior Member

    Joined:
    Mar 1, 2018
    61
    9
    0
    Location:
    NYC
    Vehicle:
    2015 Prius c
    Model:
    One
    I ride scooters and I'm used to what a CVT sounds like. I think it's gonna be weird is the on and off when going from electric to combustion. It's gonna make it easier to stay in electric mode on local streets
     
    #15 papafern, Aug 27, 2018
  16. ztanos

    ztanos All-around Geek!

    Joined:
    Jan 10, 2013
    3,339
    1,149
    40
    Location:
    Cumming, Georgia
    Vehicle:
    2012 Prius c
    Model:
    Four
    How would this work on a Prius that doesn't have an alternator?
     
    #16 ztanos, Aug 28, 2018
  17. ztanos

    ztanos All-around Geek!

    Joined:
    Jan 10, 2013
    3,339
    1,149
    40
    Location:
    Cumming, Georgia
    Vehicle:
    2012 Prius c
    Model:
    Four
    NM... just googled it and found they have a free app that works through the OBD2 adapter I already have. :D

    SoundRacer Android app
     
    #17 ztanos, Aug 28, 2018
    Mendel Leisk likes this.
  18. milkman44

    milkman44 Active Member

    Joined:
    Oct 16, 2011
    591
    386
    0
    Location:
    Ky
    Vehicle:
    2010 Prius
    Model:
    II
    But, but, but, Loud pipes save lives don't you know?
     
    #18 milkman44, Aug 28, 2018
  19. ztanos

    ztanos All-around Geek!

    Joined:
    Jan 10, 2013
    3,339
    1,149
    40
    Location:
    Cumming, Georgia
    Vehicle:
    2012 Prius c
    Model:
    Four
    Only on motorcycles... or so the theory goes. :rolleyes:
     
    #19 ztanos, Aug 28, 2018
  20. ztanos

    ztanos All-around Geek!

    Joined:
    Jan 10, 2013
    3,339
    1,149
    40
    Location:
    Cumming, Georgia
    Vehicle:
    2012 Prius c
    Model:
    Four
    So tried this last night.. the free version does not include OBD2 functionality. Found the paid version online and tried it... apparently it doesn't like most OBD2 adapters and could not find mine either. From the reviews online, this app is not well applauded and I'm glad I didn't spend money on it.
     
    #20 ztanos, Aug 29, 2018
    Mendel Leisk likes this.
(You must log in or sign up to post here.)