Im having a buddy do a laser cutout on vinyl as a favor, all he needs is the jpeg and the dimensions and he will make the design and the negative so i can do around it. IF not, i wouldve done this. Plus i failed arts and crafts in kindergarten.

 

Who did your Stage 4? I'm 1 hour south of you in Kentucky. Almost in Louisville. I'm on Stage 2 and I was running 14.1 stock all day long back in 04. Curious as to why your only getting 14.1 on a stage 4? Something is definitely not right!

 

Driving can have alot to do with it, as well as altitude and track conditions.

 

What's your trap speed?

1/4 E.T means squat to me. You could possibly getting zero traction thus a horrible reaction time.

If you're trapping >106mph, you are getting the right HP for a stage 4 IMHO.

 

Hello everyone. This thread has been dead here for a while, but was hoping for some help.

Does anyone have test pipes with a cat back exhaust on their supercharged G's? Ive been trying to find the right combination of exhaust systems to sound right. Ive gone through 2 cat backs and 3 test pipes, and with all of them i have a lot of rasp. One of my installers said that no matter what i do, there will always be rasp because of the supercharger.

I did notice that with one of the test pipes i had a leak. Could the rasp be caused by leaks in the system, or am i just screwed and have to deal with it?

 

Test pipes all are super raspy and sound like ****. I have heard the art pipes are supposed to be better but I haven't heard them in person that's why I went with the berk HFC's

 

You mean they sound like **** with superchargers? Or sound liek **** in general? I know they dont sound THIS bad in general, cuz TIAN has the same setup i had originally, and his has NO rasp what so ever.

 

I'm no expert , but FWIW, I've got a Borla CB, Stg 3, and Stillen intake, and I rather enjoy the muted supercar sound I get. I don't detect any raspiness, and I'm sure I'd notice, cause I can't stand the sound either. Seems sloppy to me. I sound lots of examples of exhaust sounds on our cars on youtube, so you might check there before doing any more.

Good luck!

 

I have serious raspyness. Here are the combinations i have had, starting from stock.

Stock Cats, Stillen Cat back exhaust = No rasp
Stup Test pipes, HKS cat back exhaust = LOTS of rasp
ART V2 Pipes, HKS Cat back exhaust = Plenty of rasp, less than above
Fast Intentions RESONATED test pipes, HKS Cat Back = Same amount of rasp as above

Current: Fast Intentions Resonated Pipes, Stillen Cat Back = Less rasp, but still plenty.

If this cant be fixed, then im selling my extra stuff, and either going with HKS or Stillen. I do love how the exhaust sounds with the pipes tho, and i want to try and get this to work.

 

The hks and stillen both do have a natural rasp to them but the test pipes just make it brutal. Look up videos on youtube there's videos of people with cats and test pipes you can check out. Also the supercharger is pushing more air thru the engine so more air and noise will come out the exhaust but the charger alone shouldn't cause rasp

 

I honestly dont understand. I had the Stillen on before, with no pipes, and it had NO rasp. And ive sat in a G35 with pipes and the HKS and it had NO rasp. Why would either of these exhausts have rasp, if they have huge *** resonators? I could understand straight pipes or a custom exhaust with a muffler. But these things have huge canisters for resonators.

And yes, ive seen plenty of videos with HKS and Stillen exhaust and test pipes. None of them have rasp.

 

There's different kinda of resonators and they don't all work the same so just because something has them doesn't mean they work. Look at the X02 exhaust the resonators have fiberglass inside them that burns out after a while of getting hot and the resonators then are like a hollow tin can making rasp worse. What kind of pipes were on the other g35 were they resonated or art pipes or basic maybe that has something to do with it. The hks and stillen are both true dual with straight through flowing resonators and mufflers there's no baffles like a factors exhaust or nismo exhaust to counter the excess noise so they are capable of making rasp. If you have heard all these cars with test pipes that never make any rasp I think you are confused on what rasp is so why don't you make a video and show us instead of asking a vague question on an old thread in the wrong section.

 

Here is the HKS with the Fast intentions test pipes:

Here is the HKS with the ART pipes:

And finally, this isnt a VAGUE question in a WRONG section. My question was, could the supercharger cause rasp with an upgraded exhaust system? Its directly related to the stillen super charger, and i want to know if my installer is just an idiot. Read my question. I want to know if the rasp (or what ever you want to call it) is caused by the extra gases being pushed out by the SC OR if its something else, like a leak.

 

When i get home, i will make a video of the sound i am talking about. It is a very rice sounding noise. The same loud crankish noise you hear with **** *** Hondas. Sounds almost like banging metal. All i know is i have NEVER had this sound since these installs.

 

Well this thread was started to get results about performance people were getting from their charger so yea its in a wrong thread and there's an exhaust section for you to start your own threads in that this question would fit perfectly into instead of thread jacking a dead one. And the video with the fast intentions tp's deffinatly have rasp the arts r not so much. The charger will make rasp worse if u have an exhaust that does it ESPECIALLY if your using test pipes I'm not making this **** up search test pipes and rasp its been documented a thousand times before. And no a leak will not ever cause rasp its a completely different sound and it doesn't come out the tips it comes from under the car like little puffs of wispy air. Art pipes or cats that's ur best chance of getting rid of it