everytime I accelarate something inside rattles, i sound like a heat shield, BUT I removed them all. What could this be and how can it be fixed. OH by the way I think its in the B-pipe not the twin loop


[Modified by hooptie157, 4:36 PM 2/8/2002]

 

prolly small piece of metal broke off. take the exhuast down and see if anything falls out.

 

That's the sound of the exhaust pulses inside the manifold. At a certain rpm (3-3.5K) they create a harmonic vibration you can hear as a noise. The Spoon header does this too (I know - I've owned both). It's because the header is single walled and thin. You can't hear this noise with the stock header because it is cast metal (and very heavy)

 

If you're using a high-flow cat, check the spot welds as I had the same problem...

 

 

So the noise is nothing to worry about???, is there anyway to make it go away. My car sound sso tinny when accerating, its sounds RICED out and I have the BEST stuff, it pisses me off

but thanks for the quick response Big Phatty, does anyone else have this problem??

Darth vader R, the noise was there before I install my carsound, I thought it was my stock cat so I replaced it, but the noise is still there


[Modified by hooptie157, 4:45 PM 2/8/2002]

 

LOL!

solution? well I have not yet been able to find one. Try tightening all your bolts again.

 

Try phoning King Motorsports as well - they may have some new suggestions. Last time I phoned them they didn't btw.

 

could this be the problem. I just recently found out that I have a 00' civic si header gasket on my 01' itr. To say the least I'm pissed off. Really pissed cause the guy who installed everything must have lost the orignal mugen one and subsitued the SI on instead. Could this be rattling??????

 

why dont you just take all your poo poo off and check?? simply said.

 

anyone?????

 

It's not the gasket - it's the SS header.

Both the Spoon and the Mugen make the same sound. Live with it.

 

could the bpipe be hitting the shift linkage? Is it rubbing against anything?

 

it's not the linkage - the sound comes from the engine bay

it's the header

 

alright big fatty I believe you about the header making the sound, but can you please explain to me HOW that sound is made. (I just wanna know) thanks

 

As the hot exhaust gases leave the cylinder head and enter the exhaust manifold - the gases expand rapidly. Because the gases enter the manifold in a pulsed fashion at certain rpm's these expanding gases will cause the walls of the manifold to resonate (which you hear as sound). Above and below this rpm range - the gases do not cause vibration or resonance. All the more reason to keep it in VTEC.

 

thanks, thats really weird I wonder why no one ever commented on this before


[Modified by hooptie157, 10:45 PM 2/8/2002]

 

I did about 18 months ago

 

If I wrap my headers will the noise go away ??????

 

ATTENTION ALL MUGEN AND SPOON header owners, has any of you ever heard this noise or is it just me and big phatty?????


[Modified by hooptie157, 4:00 AM 2/10/2002]

 

Well I don't have the MUGEN or SPOON headers but I heard something similar from my JDM 4-1 header when I was just running a testpipe. A really tinny noise was coming from the engine bay so I put a short resonator into the testpipe and the noise went away. Quality issues with aftermarket collectors made me seek out a JDM CAT which I now run with no noise issues either. Given that the JDM 4-1 is double wall/anti reversion (and yes very heavy) etc I can only imagine that my problem was mild compared to what you may be experiencing

David.


[Modified by NZITR, 2:15 AM 2/10/2002]

 

Hmmm do you think that there is anything I could do to fix the problem, I have the below mods (in my sig)

 

try checking the hanger right before the muffler...i had to have mine bent bacause it was touching a part under the car...


[Modified by mugenr#1011, 6:16 PM 2/10/2002]