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Hello, So I have the typhoon intakes, upper intake manifold Berk HFC, and as of yesterday the AAM Short Tails. So anyone who has these Short tails knows there is
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05-04-2016, 12:17 AM
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#1 (permalink) |
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Base Member
Join Date: Jan 2015
Location: Columbus Ohio
Posts: 161
Drives: 2010 370z 6MT
Rep Power: 10  |
AAM Short Tails Exhaust Question
Hello,
So I have the typhoon intakes, upper intake manifold Berk HFC, and as of yesterday the AAM Short Tails. So anyone who has these Short tails knows there is a large drone from 3-4k RPM. And what I'd like someone who understands it better to explain to me is how does the drone occur? Like is the sound echoing through the pipes and resonating at some frequency that magnifies it? or what happens? TLDR; why is it that I get loud noises from 1-2k, quiet from 2-3k, loud from 3-4k, and then back to quiet (relatively) all the way to redline? Like what is the process that causes this fluctuation? Thanks, KBC749
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2010 Black Cherry 370Z Admin 3" intakes, Motordyne LTH, ART Pipes, AAM Catback, Z1 Anti Starve Kit, and some other stuff too |
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05-04-2016, 09:23 AM
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#2 (permalink) |
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A True Z Fanatic
Join Date: Mar 2011
Location: NJ
Posts: 2,400
Drives: slowly
Rep Power: 40569  |
Resonance and fundamental frequencies. The tube length is fixed but the frequency of pulses, air velocities, and pressure all vary so you get many different resonances and volumes.
https://en.wikipedia.org/wiki/Acoustic_resonance |
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05-05-2016, 11:11 AM
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#3 (permalink) |
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Base Member
Join Date: Jan 2016
Location: Sarasota, Florida
Posts: 95
Drives: 2010 370Z 40th ANNIV
Rep Power: 9 |
I bought resonated AAM short tails.. very worth it, no annoying sounds with a perfect roar.
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2010 40th Anniversary 6MT | Motordyne shockwave catback | Motordyne ART test pipes | Stillen Gen 3's |
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05-05-2016, 12:32 PM
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#5 (permalink) | ||
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A True Z Fanatic
 
Join Date: Jul 2011
Location: Pittsburgh PA
Posts: 38,517
Drives: 15 GT-R BE/09 370Z
Rep Power: 1402085 |
Quote:
AAM Competition - Nissan GT-R, 370Z Turbo Performance Specialists
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324whp/258wtq AAM Tuned |F.I. NonRes CF CBE/NonRes TestPipes #373|UpRev Tuner|Akuma Motorsports Intakes|Z1 34 Row Oil Cooler Quote:
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05-07-2016, 09:07 AM
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#8 (permalink) |
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Base Member
Join Date: Jan 2016
Location: Sarasota, Florida
Posts: 95
Drives: 2010 370Z 40th ANNIV
Rep Power: 9 |
Haha I actually contacted AAM to ask for them before they put them on the website. They just added the Resonated short tails on the website a few weeks ago but I've had mine on my car for at least a month now and I LOVE them. Sound is perfect. Now I have never heard the non resonated tails in person so I'm at a disadvantage. But I'm Also buying the motordyne ART test pipes today.
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2010 40th Anniversary 6MT | Motordyne shockwave catback | Motordyne ART test pipes | Stillen Gen 3's |
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