Cat Back Exhaust Fitted, Droning

[RBFIRE]

Hi,

I just fited and HKS Silent Hi power Cat back Exhaust, 3 inches,

It not too loud, idling is good, but when give it some gas, the droning is very anoying,

i cant imagine going on a long trip with it,

does any one know how to eliminate the droning problem?

I did search and read some threads,

mentioned about adding resonators,

can they do that with the exhaust i had? because i fink they will need to cut it and add a resonator to it, COSTLY?

any other methods???

thanks heaps,

cheers,

darrien

[fooey]

If it's only catback how come its so loud and droning?

[silver gts-t]

If it's only catback how come its so loud and droning?

<{POST_SNAPBACK}>

its possible,

my opinion is get used to it...

after a while u wont know its there

[MANWHOR3]

I don't understand what people's obsession with droning is. It's not droning, it's just exhaust noise!

Basically, if you want a loud exhaust, it'll sound loud. Of course it will make noise if you put on a more free flowing one. free flow = noise. simple as that.

People go, oh, it's drones when driving. Well, that's just noise, which was once silenced by the power robbing mufflers.

If you don't want to hear anything, put the stock one back on.

[nuffsaid]

its possible,

my opinion is get used to it...

after a while u wont know its there

<{POST_SNAPBACK}>

I thought the hks silent hipower was fairly quiet

misleading advertising i guess aye

[MANWHOR3]

adding a resonoator will make it quieter yes, but imagine it like this:

On one end, you ahve ultimate silence with the stock catback. very restrictive.

On the other end, you have a bit noisey. Very free flowing.

You pick where abouts in the scale of things you want to be. Adding a resonator will cost you between 150-200$ for a decent one and decent workmanship. It'll be quieter all around, sound less tough, and hav less power.

[benm]

Check your cat to make sure it is in good working order (ie not gutted or dead) as you may just need to replace this (~$350).

[grigor]

Start saving.

You can make them quiet with a decent mid-mount. We just installed the biggest straight through turbo muffler we could fit, 3" mid mounted, about 500mm long x 300 wide. With the big cannon at the end it was perfect. Nice burble on the idle, no restriction and it still sounded great flat out.

Lasted all of 1000K's before the heat cooked all the packing and now it's back like it was. Dreadful at about 25-2800, but smoothes right out around 3200.

Next time it's a stainless packed hand made job coming up. Purpose built for big power rotaries.

[benm]

The key to no droning and low noise level is the biggest muffler you can possibly fit under the car.

[ish]

well i know nothing about this subject except some people just know what there doing as far as making good ones (mufflers resinators)

Now you will all scoff at this but its is entirly true ...

I am new to skylines .well not that new always had a r31 daily!

Now my gtr does the same thing ... gives me a headache after a few hours so i will be doing the same thing...

years ago i got AVO kit for my rb30et....... to cut story short the res and the mufflers were 3 inch custom made (terrywilson design i think)

this was simply the best note i have ever heard for a 3 inch mandrel,quiet but injection throaty ... I ended up storing, keeping it and moving on car later to have it spare when i bought another rb30et fitted with a 3 inch and import mufflers .... horrible !!! whole car sounded like a plane inside... i took car into shop and we converted from catback to AVO 3 inch res and muffler.... and guess what .8 more psi with less decibells .... now terry is not my hero but he seems to know how to make things so there legal and powerful .... Worth a bit of study i think .... noise is just defect material i am concinced NOW!

Edited February 4, 2006 by ishh

[RBFIRE]

Hi all,

How can i put it? <_<

Plain words ...

I had this car in stock form, very quiet, i can hear even a mosquito buzz in the car,

then when i had this Cat back Fitted, guess my ears was NOT get used to it. I got annoyed. but now I got used to it, and i kinda like it, adictive maybe, :lol: BUt its LOUD,

as silver GTS-t 's advice, hehhaa...

MANWHOR3 : Droning is different from LOUD, IMO,

I had 300zx b4, got 2.5 twin, it is LoUD ass, but when u drive, it doesnt make that noise like it has with the skyline, its kinda noise like it resonate in ur ears, its hard to descbribe with words, but its way diferent when u experiences it? if any 1 had the same experiences, please help me out, LOL< ( to explain)....

well thanks for the helps guys,

its LOUD but i can live with it. I duno about Cops tho.

I will get a Split dump and a Hi flow Cat in a month or 2, wil it make it louder?

heaps?

or just a tad?

cheers,

darrien