Exhaust systems

• zerocool85

  1 Jul 05, 21:03

  I wonder if we change our stock exhaust to those with a nice sound, will it increase the car's fuel consumption?
  
  Besides the sound, does it really improve the car's performance?
  
  Thanks!
• Ah Wei

  1 Jul 05, 22:17

  Performance gain not much............. on paper 3-5bhp, but in self, can't feel much really.
  
  Unless you do up your extractor and cam, sure got performance increase. But, they are not allowed.
• TwinTurbo_Supra

  1 Jul 05, 22:21

  people change exhaust because of sound not power.
• Lance_han

  1 Jul 05, 22:24

  yep..power gain, FC lost
• tailslide

  1 Jul 05, 23:26

  Originally posted by TwinTurbo_Supra:

  people change exhaust because of sound not power.

  haha, tts, lesson time 4 u again
  
  maybe changing exhaust wun do much, but upgrading exhaust sure does. exhaust constitutes one of the primary components of a basic mod job, IHE: Intake, Headers, Exhaust.
  
  now, it is important that u know what u are upgrading to. exhaust mods can be a double edged sword. too free flow, and ur low end suffers like mad. too restricted, then ur engine suffocates itself with exhaust blow back at higher rpms (accompanied by power loss).
  
  the best is to strike a good balance. if u drive ur car "daintily" (for the lack of a better word) and as a means of transport where fc is the main concern, best to keep the stock one. if u are the occasional street racer (not encouraged) dragging ur engine once in awhile, u'd be happier with some gains at mid to hi rpms. if u are a weekend track warrior, then u'll want some really straight thru exhaust to maximize ur top end power.
  
  in any case, the power gains in each case depends on ur base platform. ie, the performance quotient of ur engine. generally, improvements in power is proportional with factors such as displacement, compression and boost (in force inducted engines). as a rough guide, an evo might see gains of up to 15-20 hps with a proper exhaust upgrade whilst a normal sunny, civic or altis might see only 5 hps. likewise, a 8 liter dodge viper might gain 20-30 hps compared to a 2 liter DC5 with only around 10 hps.
  
  so if u are one that thinks exhaust is juz for sound n show, u are sorely mistaken
• ShutterBug

  2 Jul 05, 07:07

  Hey Tailslide,
  
  There you go again.
  
  If i'm as rich as Bill Gates, I'd hire you permanently as my personal mechanic!
  
  Fully agreeable to your take on exhaust mods. I'm a firm believer that stock exhaust, really don't do justice to any car of any make. It's like having a permanent stuffy nose.
• TwinTurbo_Supra

  2 Jul 05, 10:23

  Originally posted by tailslide:

  so if u are one that thinks exhaust is juz for sound n show, u are sorely mistaken

  I WAS TRYING TO BE SHALLOW! *slaps forehead*
• tailslide

  4 Jul 05, 01:22

  Originally posted by ShutterBug:

  Hey Tailslide,
  
  There you go again.
  
  If i'm as rich as Bill Gates, I'd hire you permanently as my personal mechanic!
  
  Fully agreeable to your take on exhaust mods. I'm a firm believer that stock exhaust, really don't do justice to any car of any make. It's like having a permanent stuffy nose.

  err, i take dat as a compliment?
  
• tailslide

  4 Jul 05, 01:23

  Originally posted by TwinTurbo_Supra:

  I WAS TRYING TO BE SHALLOW! *slaps forehead*

  lets juz say u did helluva good job at convincing me
• TwinTurbo_Supra

  4 Jul 05, 11:13

  Originally posted by tailslide:

  lets juz say u did helluva good job at convincing me

  i thought the smiley would be a good hint.
• jiayong

  4 Jul 05, 13:10

  Originally posted by Ah Wei:

  Performance gain not much............. on paper 3-5bhp, but in self, can't feel much really.
  
  Unless you do up your extractor and cam, sure got performance increase. But, they are not allowed.

  i do believe upgrading of cams are allowed.