Okay I tried to search other forums for a direct answer but I didnt find anything. I bought some test pipes awhile back that were non-resonated. When you look through the pipe there isnt anything that looks like it would create such a sound. So what does create the sound? Can i have an exhaust shop install resonators? Im about to take them off and gut my old factory cats..... but then again why dont the gutted factory cats create rasp? thanks guys, JOSH

 

Air (exhaust) forced through pipe makes noise. Determining factors include: material, thickness, inner diameter, length, bends, distance from source. A resonator is one technique to reduce noise. Another method is the muffler.

 

Same effect occurs in your innards when you consume large quantities of cheap, exotic food. Only we don't call it rasp.

 

Also keep in mind that temperature will affect the resonance. It may be fine when the car is cold but after a while it could get worse as things heat up.

 

Rasp is caused by these little green men who climb into your exhaust and start singing high notes when you punch your car. j/k

I think its mostly the resonance. If you add resonators it will go away. Resonators take away sharp high pitch noises in the exhaust, mufflers remove low pitch deep noises.

 

+1

 

isn't rasp caused by sitting on dirty toilets that someone with rasp had sat there before???...u need to shave all your pubic hair and apply some ointment and it may you away within a few weeks....





...i think

 

^^^Wow buddy......

I'm having the same problem with my Invidia test pipes and because of the sound, i cant see myself keeping them. I'm hoping that resonated tp's will be more of what i want. but which resonated tp will sound the best?? i dont care if its deep loud but mine sounds like a fawkin broken HONDA and i despise it!!

 

im just going to gut my old cats this weekend.... i cant afford resonated tps right now, ill sell these for cheap, i cant see anyone ever buying tps that arnt resonated... i was retarted for doing so myself.

 

yup, i feel the same way but then again i didnt know much back when i got them. later

 

how about drilled through oem cats, are they raspy?