What sounds as good as an audi I5?

DDG · Posted: Tue Sep 09, 2008 2:39 pm Post subject:

What makes 5cyl or any odd numbered engine (v10s included) have that "undertone", is they create a "beat frequency" in the exhaust note.
Wikipedia: "In acoustics, a beat is an interference between two sounds of slightly different frequencies, perceived as periodic variations in volume whose rate is the difference between the two frequencies."

A 110 Hz A sine wave (cyan), a 104 Hz G# sine wave (magenta), their sum (blue) and the corresponding envelope 6 hz. (red)

I believe it has to do with the fact that the firing pulses don't line up with one revolution of the crank. I know fives have a firing pulse every 144°, but I think it has to do with the fact you're trying to lay five over two... if that makes sense! (if your'e a drummer you know what I mean)!
I also believe 3's 7's and inline 9's should sound similar if not the same.

apavlov13 · Posted: Tue Sep 09, 2008 5:37 pm Post subject:

Heres a triple:

http://www.youtube.com/watch?v=fK37w3MG4yo

I like it; sounds a lot like a Porsche!

colt.45 · Posted: Wed Sep 10, 2008 9:44 am Post subject:

on the m3 rally video. its a normally aspirated m3 motor. i believe it was 2.4 or so 4 cyl. and i found a different video of that same car, and its a sequential transmission

Quattro Krant · Posted: Wed Sep 10, 2008 1:56 pm Post subject:

LS2 sounds GREAT

3B'dB3 · Posted: Wed Sep 10, 2008 3:59 pm Post subject:

Any MotoGP Bike sounds amazing.
its the loudest thing ive ever experienced.

http://www.youtube.com/watch?v=kbpqe-wvcuU

DDG · Posted: Wed Sep 10, 2008 4:04 pm Post subject:

3B'dB3 · Posted: Wed Sep 10, 2008 4:10 pm Post subject:

yep, all 4cylinders now, I think they're all V'4s too, i could be wrong.
4 stroke, 800cc, figure about 250+ hp on a 350lb machine.

DDG · Posted: Wed Sep 10, 2008 4:30 pm Post subject:

loxxrider · Posted: Fri Sep 12, 2008 7:14 am Post subject:

just saw this last night

http://videos.streetfire.net/video/FIAT-Marea-turbo-402m_183243.htm

and since noone has posted vr6 sounds, I'll do it for ya

http://www.youtube.com/watch?v=_OafCq1izXE

and I must say, a tear or two came to my eyes as I watched those auto union cars.

An oldschool hemi has also been known to bring a tear to the eye of my father as well as my own. Smile

I love cars.

loxxrider · Posted: Fri Sep 12, 2008 7:16 am Post subject:

oh, and can't forget the good Mr. Chris Green...he helped a lot with my last car.

http://www.youtube.com/watch?v=aqce-X4wArA&feature=related

vwhammer · Posted: Sat Sep 13, 2008 11:12 am Post subject:

Porsche Carrera GT
http://www.youtube.com/watch?v=tm2E0V01DYs
http://www.youtube.com/watch?v=WmGLK55_Qy4&feature=related
http://www.youtube.com/watch?v=fdePhx9HVjo

I haven't found anything recently that I think sounds better

There's a vid out there of some guy balsting around on some twisties and through some tunnels in the GT but I can't find it.

HighDesertAudi · Posted: Sat Sep 13, 2008 11:22 am Post subject:

The I5 is so unique sounding, it's great. Other engines I love to hear are Flat 6's in Porsches, VR6's, and a 2.7T with ASP exhaust Drool

http://www.youtube.com/watch?v=PLIxGqPTdrA

V8's don't reallyl do much for me, but I like the sound of most exotic engines V10, etc.

DDG · Posted: Sat Sep 13, 2008 11:22 am Post subject:

Chabaso · Posted: Sat Sep 13, 2008 11:32 am Post subject:

http://www.youtube.com/watch?v=gSHToyGIxWE

Biggrin

and jsut cause its hilarious

http://www.youtube.com/watch?v=fEDwfk8EYR0

DOC · Chirping second Joined: 18 Oct 2004 Posts: 84

a large bore tt exhaust from AJ6 engineering, on a v-12 Jag with steroids. Sounds similar to the twin six cylindered fuel dragsters of the 60's.

apavlov13 · Posted: Sun Sep 14, 2008 12:13 am Post subject:

this?

http://www.youtube.com/watch?v=foDcLUhUKqI

yodasfro · Posted: Sun Sep 14, 2008 12:16 am Post subject:

Jonathan · Posted: Sun Sep 14, 2008 9:17 am Post subject:

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