back pressure (popping sound)

hondasi006 · 12-02-2006, 01:10 PM

i have the neuspeed catback on my si and from day one i noticed that popping sound, i think its backpressure, i am not sure someone correct me,

any way its been getting slightly louder and i would assume that getting a race header and therefore removing the cat would make that pop sound even louder, anyone with a race header and a high flow exhaust notice this, could you maybe try to post a video or a sound clip. thanks

***ILL FG2*** · 12-02-2006, 04:42 PM

Yep, I got the same exhaust, and the same noise. No clue what's causing it though.

PoLiShPrInCe · 12-02-2006, 05:36 PM

that noise is COOL

hondasi006 · 12-02-2006, 06:34 PM

yeah thats why i want it to be louder

P4rD0nM3 · 12-02-2006, 09:05 PM

It's unburned fuel. The more you get it the more of a fuel slut your car is. Dunno why people like it. The less back pressure the better.

jda07Si · 12-04-2006, 01:37 AM

Quote:

Originally Posted by P4rD0nM3

The less back pressure the better.

to a certain extent, right?

noise seems the norm with bigger exhausts, i've got the skunk2, i'm starting to get what sounds almost like a backfire, real faint though, everytime i downshift

also anytime i left off the gas during high rpms, i get the popping sound, it's nice, yeah

P4rD0nM3 · 12-04-2006, 12:44 PM

EDIT: Don't mind what I said above. Nevermind. I forgot, this is a Honda Site.

0RoyalBlue6 · 12-18-2006, 05:53 PM

just a quick question while we are on back pressure, how easy is it to suck an exhaust valve do to free flow exhausts?? always hear about doin it runnin straight header how true/easily can it happen??

1bad06si · 12-21-2006, 05:42 PM

Quote:

Originally Posted by 0RoyalBlue6

just a quick question while we are on back pressure, how easy is it to suck an exhaust valve do to free flow exhausts?? always hear about doin it runnin straight header how true/easily can it happen??

soon you will be spitting hot fire, mine does it also and it sounds like a small explosion in the exhaust chamber, almost like a ball of fire shooting out the tailpipe

1stk20z3 · 02-19-2007, 08:46 AM

mine does it i love the sound kinda sounds like a subaru! btw i have a costum cat back exaust system!

healtoc · 03-06-2007, 05:57 PM

I run a custom catback with a race worthy 5zigen fireball muffler..(not really a muffler...just a straight pipe). I pop all day log...people at on eof the meets heard it...espacially at low rpm. Cruz at 15...let off the gas...pop pooop pop...then the burbly noise. Its not bad. just fuel. In thoery with high comp and straight pipe you will let out a fireball.

baskero · 04-22-2007, 12:01 PM

I was wondering what is backfire? I see some cars do it, it looks pretty cool. Thanks for all help.

12-02-2006, 01:10 PM	#1 (permalink)
hondasi006 Senior Member Join Date: May 2006 Posts: 1,128 iTrader: 0 / 0%	back pressure (popping sound) i have the neuspeed catback on my si and from day one i noticed that popping sound, i think its backpressure, i am not sure someone correct me, any way its been getting slightly louder and i would assume that getting a race header and therefore removing the cat would make that pop sound even louder, anyone with a race header and a high flow exhaust notice this, could you maybe try to post a video or a sound clip. thanks

04-22-2007, 12:01 PM	#12 (permalink)
baskero Senior Member Join Date: Aug 2006 Posts: 176 iTrader: 3 / 100%	hm I was wondering what is backfire? I see some cars do it, it looks pretty cool. Thanks for all help.

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12-02-2006, 04:42 PM	#2 (permalink)
*ILL FG2* I hate you Join Date: Oct 2006 Location: Chicago/Northbrook, IL Posts: 1,477 AJ iTrader: 1 / 100%	Yep, I got the same exhaust, and the same noise. No clue what's causing it though.

12-02-2006, 05:36 PM	#3 (permalink)
PoLiShPrInCe Senior Member Join Date: Dec 2005 Location: GTA, Canada Age: 26 Posts: 3,142 iTrader: 0 / 0%	that noise is COOL

12-02-2006, 06:34 PM	#4 (permalink)
hondasi006 Senior Member Join Date: May 2006 Posts: 1,128 iTrader: 0 / 0%	yeah thats why i want it to be louder

12-02-2006, 09:05 PM	#5 (permalink)
P4rD0nM3 Senior Member Join Date: Nov 2006 Posts: 1,323 iTrader: 0 / 0%	It's unburned fuel. The more you get it the more of a fuel slut your car is. Dunno why people like it. The less back pressure the better.

12-04-2006, 12:44 PM	#7 (permalink)
P4rD0nM3 Senior Member Join Date: Nov 2006 Posts: 1,323 iTrader: 0 / 0%	EDIT: Don't mind what I said above. Nevermind. I forgot, this is a Honda Site.

12-18-2006, 05:53 PM	#8 (permalink)
0RoyalBlue6 Member Join Date: Jul 2006 Location: Antioch California Posts: 38 iTrader: 0 / 0%	just a quick question while we are on back pressure, how easy is it to suck an exhaust valve do to free flow exhausts?? always hear about doin it runnin straight header how true/easily can it happen??

02-19-2007, 08:46 AM	#10 (permalink)
1stk20z3 Senior Member Join Date: Apr 2006 Location: Hawaii Age: 20 Posts: 1,815 Casey iTrader: 0 / 0%	mine does it i love the sound kinda sounds like a subaru! btw i have a costum cat back exaust system!

03-06-2007, 05:57 PM	#11 (permalink)
healtoc Senior Member Join Date: Nov 2006 Location: SoCal Age: 22 Posts: 169 iTrader: 2 / 100%	I run a custom catback with a race worthy 5zigen fireball muffler..(not really a muffler...just a straight pipe). I pop all day log...people at on eof the meets heard it...espacially at low rpm. Cruz at 15...let off the gas...pop pooop pop...then the burbly noise. Its not bad. just fuel. In thoery with high comp and straight pipe you will let out a fireball.