38 replies to this topic

[JAP63]

Can anyone say 100% that a stainless exhaust will give a different note to a mild one?
I understand that each steel has its own frequency, but does it actually make a difference in note?...*paging Jayrome*


I do like the sound of this E9


Its got a pretty hard bark....Im pretty sure it has no muffler or rear exhaust section though..

[rob323]

Yes, but only due to the fact that stainless is usually thicker that the mild steel used in exhausts.

[JayRome]

yup S/S will give a different note to Mild

normally due to resonance in the pipe, Mild tends to hold the sound waves in, where as S/S, you can sometimes hear the exhaust through the pipe (obviously depending on the pipe thickness used, but its normally in that ball park)


Mild: all the exhaust note is at the rear/end of the exhaust (give or take thin wall mufflers and CAT's used)

Stainless: the material seems to act like a speaker, giving it that tin'ish sound at some RPM levels.. (take a listen to a SR20DET with a full S/S exhaust you will hear what i mean)..


grab a 1m of S/S pipe and 1m of Mild, stand them upright and tap the top end with a screw driver... you will already hear the pitch difference between both.... then just imajin it being 3/4m long with varying sound waves forced through them..

*oh and the evo sounds like a straight pipe exhaust with a cannon on the rear...

Edited by JayRome, 26 February 2009 - 12:43 PM.

[JAP63]

Ah, interesting, so which sounds better then?
I want a deep bark..and loud...loud on full noise that is, its not my daily remember....

Stainless: the material seems to act like a speaker, giving it that tin'ish sound at some RPM levels.. (take a listen to a SR20DET with a full S/S exhaust you will hear what i mean)..

Some SR's sound really good...

[rob323]

Some SR's sound really good...

If you like that Massey Ferguson type of thing

If you want loud and tinny, use thin metal but don't complain about it cracking.

[brettu26]

I do love that lazy tractor ish sound that VR's and SR's produce

I have just had a cheap 304SS cannon put on the back of my nice 316SS system and i can definately notice the sound coming thru the muffler not jsut out the tip. It sounds great under load when its grunting
but shit when at low rpm

[Dean]

Titanium

[JayRome]

i would personally go mild, cause it tends to last longer under a car without getting dinted by rocks etc, also less prone to cracking also...

i would say...... 2.5" dump with screamer pipe, flared into 3", with a full 3" mandrel bent exhaust with Metal cat and a single large oval muffler on the rear (fairly large 5X7" and fair length) or a name brand cannon (about the 6-7" diam and fairly long)... should give you that deep bark with a nice sound on boost....


or if you really want to spend the cashies..... full 316 grade Stainless steel exhaust...

Edited by JayRome, 27 February 2009 - 03:40 AM.

[4g63tcyborg]

Okay boys, now that I have the cyclone manifold sorted out its time for an exhaust system. I have been reading this thread and have some ideas of what i want. I want a nice note on idle that wont atract too much attention. but i want it to bark but not drone on cruise.

please someone explain to me what a "screamer pipe" is (photos would be great).

I am thinking of 3 inch mandrel bent hi flow cat and a muffler at the rear.
I need some ideas of what I should do with the dump pipe. I am running the standard turbo from the 4g63t vr4 evo 0 engine yellow injectors tdo5 (I think).

I will puchase all of the the exhaust components my self and weld it all up my self.

All ideas and pointers would be apreciated all photos and vids of others would be a great starter. thanks guys

[4g63tcyborg]

Been on you tube i like the sound of these two



and



I like the second 1

[Liberoz]

I want a deep bark..and loud...loud on full noise that is, its not my daily remember....

Just put a straight through with a resinator and you will get what your asking for I would put a flange on the rear so you can make it legal and throw a rear muffler on it when and if you are required

[ENGINR]

Your muffler will play the biggest part in how it sounds.

[milkandoj]

Mild tends to hold the sound waves in, where as S/S, you can sometimes hear the exhaust through the pipe

Mild: all the exhaust note is at the rear/end of the exhaust (give or take thin wall mufflers and CAT's used)

Stainless: the material seems to act like a speaker, giving it that tin'ish sound at some RPM levels.. (take a listen to a SR20DET with a full S/S exhaust you will hear what i mean)..
...

Would this mean that thin wall, stanless steel, would have more drone to it when cruising around.
Where as thicker wall, mild steel, wouldnt drone as much but bark out the back more when giving it stick?
Probably more relevant to a daily driver it know, but worth asking.

Your muffler will play the biggest part in how it sounds.

Ive seen a gsr get a much much deeper and gruff sounding note when he put on a differnt cannon that was a larger diameter. Probably because of the larger volume for sound to resonate. sounded lumpyer to.
Steve if your reading its your car, sounds good!

Edited by milkandoj, 26 April 2009 - 08:34 AM.

[JAP63]

please someone explain to me what a "screamer pipe" is (photos would be great).

A screamer pipe is the pipe that comes off the dump pipe for the wastegate gas only, when vented to atmospher (not into the dump pipe) people call it a screame rpipe.

Takes away fromt he exhaust note i think.

Edited by JAP63, 26 April 2009 - 08:49 AM.

[JAP63]

Would this mean that thin wall, stanless steel, would have more drone to it when cruising around.
Where as thicker wall, mild steel, wouldnt drone as much but bark out the back more when giving it stick?
Probably more relevant to a daily driver it know, but worth asking.

In effect, yes.

Thinner pipe lets the noise resonate outwards throught the steel, rather than the thicker pipe which channels the noise more out the rear end and insulates the noise alot better.

[milkandoj]

screamer pipes are INSANE!!!!!!
and illegal lol
left my ears ringing after a tunnel run:lol: (not my car) i want one though

But another member on here did say with a small turbo like a 16g it became a pain as even half throttle off at the lights and it will vent a bit and v6 commodores think your racing.

On a cruise i heard a turbo v8, you'd hear the cams idling, then when he'd take off.... v8 throb and roar, then turbo spooling, turbo come on, then haaaaaa!!!! GATE! was one of the best car sounds ive ever heard. OFF CHOPS. Anyway i better stop talking shit and get back to my car......

Edited by milkandoj, 26 April 2009 - 09:23 AM.

[mattrat]

ive deafened a few of my mates ahah

[JayRome]

In effect, yes.

Thinner pipe lets the noise resonate outwards throught the steel, rather than the thicker pipe which channels the noise more out the rear end and insulates the noise alot better.

also depends on what the inside sound deadening material is made from...

cheap shit: fiber glass (not bad at the start, but when the bitch hardens it turns the muffler into a straight pipe)..

good stuff: steel wool and proper air chambers to counter act resonance....

oh and screamer pipe for those that don't know what they look like...

when your waste gate is not plumbed back into the exhaust.... really farkin loud!

[bazeng]

The famous Jay's feet pics!..

You should start a thread with all the pics with your feet in them!

Looks good Jay,

Anyway, nothing beats the sound of a straight out exhaust...

[Dean]

ey your second toe is larger than your large toe. lol