Quote:
Originally Posted by Caravanshaka
While I do agree that there is likely not much of a gain to be had by deleting the muffler...there is, however, quite a bit of weight savings in dropping that thing off the *** end of the car. Now, it's not dropping weight where we would prefer (front end), but it is dropping weight none-the-less. No HP gain but a reduction in weight is still considered a performance increase.  |
Quote:
Originally Posted by Phimosis
I disagree about this being a rice mod. As pointed out, the weight, but also, it's like taking a Lamborghini Gallardo and putting aftermarket pipes on it. Sure, you only gain 10hp on 560, but it makes such sweet music. It's a more satisfying mod than removing my Bose sub and adding a 12" speaker and amp. To some it's just noise. To me, it is music. Unfortunately inline 4's don't sound like music unless they spin faster than 10,000 rpm. For that reason, my Yaris, which is lowered, has aftermarket swaybars, shocks and Momo wheels, has a STOCK exhaust.
|
Yeah, I have to admit that I neglected to take the weight-savings aspect into account, so I guess it's not entirely rice. I still think it's a poor substitute for getting a proper aftermarket exhaust though. Just my opinion.
Quote:
Originally Posted by Phimosis
Stock exhaust has 2 cats, 2 diffusers and one muffler. I don't think it's neccesarily fair to say it's the cats cutting the noise. You've got me curious enough to unbolt the rear section of my stillen exhaust to see if it's the cats or the diffusers....
|
Replacing just the stock cats with HFCs and leaving the stock cat-back in place produces a significantly louder exhaust note. DDMotorsports has a vid clip showing this. From this alone it's obvious that the stock cats are having a noise-suppressing effect. Are you suggesting otherwise? That the stock cats aren't cutting any noise? Yes, the resonators are cutting noise as well, but if the stock cats didn't cut any noise, I don't think the HFCs alone would produce as dramatic an increase in sound as they do.