E30 Exhaust Disappointment

[e30strokr]

here s mine

https://youtu.be/1kjoGgtSadQ

[AK2002]

mine sounds totally different than that. Mine is no where near that deep.

Also, that vid is an m50 with vibrant rez and a whatever muff.

I have a bottleneck rez with a vibrant muff hehehe

Also, their (vibrant) style of resonators are essentially small mufflers that are much wider in relation to how long they are.

In my experience a long rez with a slightly larger diameter than the pipe will yield a lighter tone with no drone.

I’d like to hear a video of yours when you get time. I’m considering the same set up.

[MrBurgundy]

That sounds really good, what piping are you running to that?

[DrJosh]

My scorpion cat back (stock cat/headers) is not very raspy. Here is a shitty gopro video

https://www.youtube.com/watch?v=rSU5HQ5qSQE

[e30strokr]

mine sounds totally different than that. Mine is no where near that deep.

Also, that vid is an m50 with vibrant rez and a whatever muff.

I have a bottleneck rez with a vibrant muff hehehe

Also, their (vibrant) style of resonators are essentially small mufflers that are much wider in relation to how long they are.

In my experience a long rez with a slightly larger diameter than the pipe will yield a lighter tone with no drone.

mines a 2.7i vibrant resonator ( ultraquiet is the one on that youtube) with vibrant muffler single to dual out 3 inch...…

and a 2.25 non-mandrel bent exhaust...

doesn't sound as deep but theres no rasp, need to get a video of mine too....

[ForcedFirebird]

If you "WANT" rasp (as I took the OP), the the easiest way is to put a y-pipe right after the o2 bung and rune straight 2.5" to a straight through DTM muffler. Or, you could just use a Spec e30 exhaust, when we are at the track, the spec class sounds like a bunch of angry bumble bees fighting for turn 1. Spec exhaust is basically a 2.25" straight through to the single ~15" resonator where the muffler used to reside.

Dual exhaust helps curb rasp.

[MrBurgundy]

mine sounds totally different than that. Mine is no where near that deep.

Also, that vid is an m50 with vibrant rez and a whatever muff.

I have a bottleneck rez with a vibrant muff hehehe

Also, their (vibrant) style of resonators are essentially small mufflers that are much wider in relation to how long they are.

In my experience a long rez with a slightly larger diameter than the pipe will yield a lighter tone with no drone.

[e30strokr]

single in dual out is the key for nice m20 note

y pipe after a high flow cat, then a nice long resonator into a single in dual out vibrant and you'll come back and thank me

Best sound ever.. I've tried it all and this is the one

a resonator will remove the rasp and it will deepen the tone..I got a vibrant muffler and added a resonator to lower the rasp/tone... it sounds deeper then when I had the Xpro muffler

heres an example

https://www.bing.com/videos/search?q=m50+vibrant&docid=608009915975533600&mid=6357DC0340439D54FE946357DC0340439D54FE94&view=detail&FORM=VIRE

[MrBurgundy]

Waiting for the vid of your baked potato.

Brace yourself for an offensively mediocre e30

[roguetoaster]

I'll take a vid of mine after work for you

Waiting for the vid of your baked potato.

[MrBurgundy]

Thank you for the long informative response. Much appreciated!



I AM in fact hungry. Baked potatoes sound pretty darn good this time of year



I’ll try to find some YouTube clips of a similar setup. Thank you!

I'll take a vid of mine after work for you

[6th Element]

Rasp and "hollow" typically go hand in hand, just listen to a new edge mustang with flowmasters. Hokey explanations about pulse order and such you'll find on forums aside, if you look at an actual spectrogram of different exhaust sounds, rasp is identifiable as excess of higher frequency noise relative to the lower fundamental frequency noise that is the frequency of exhaust pulses. Funny that you're looking for the rasp, most people try to eliminate it. Since the M20 doesn't rev high enough to be a screamer where the more pleasant high frequency noises dominate the rasp, mid range rasp typically is not viewed as pleasant. Straight through mufflers and narrower pipes (i.e. stock size pipe and mufflers) will tend to let the rasp through without the "hollow" mid/low frequency resonance that you typically get from big and/or thin pipes. Cats are great for eliminating resonance since they're basically a resonator with a flow control device (the matrix) inside them. So choose a bolt on system based on clips, or weld a resonator in.

Thank you for the long informative response. Much appreciated!

OP, just stick a potato in your exhaust.

I AM in fact hungry. Baked potatoes sound pretty darn good this time of year

single in dual out is the key for nice m20 note

y pipe after a high flow cat, then a nice long resonator into a single in dual out vibrant and you'll come back and thank me

Best sound ever.. I've tried it all and this is the one

I’ll try to find some YouTube clips of a similar setup. Thank you!

[roguetoaster]

PO-TA-TO. Do it.

[Reichart12]

Not sure I have ever heard anybody want rasp... but here's my set up. Sounds great. Bavauto long tube headers into a single 2.5" into a vibrant resonator and vibrant muffler.

[MrBurgundy]

single in dual out is the key for nice m20 note

y pipe after a high flow cat, then a nice long resonator into a single in dual out vibrant and you'll come back and thank me

Best sound ever.. I've tried it all and this is the one