can I have the cake and eat it too?

edeeZee · 06-18-2009, 07:09 PM

a) give them to me for free
b) just deal with it
c) use those squishy ear plugs when driving
d) none of the above

tru_Asiatik · 06-18-2009, 07:18 PM

my mods listed in my sig even with them
i think i too quiet its not as loud and deep sounding as my celica with tanabe exhaust and aem intake

john370z · 06-18-2009, 09:30 PM

Excellent advice!!! Thank you!

semtex · 06-19-2009, 10:40 AM

John, I forgot to tell you earlier -- adding the Stillen headers will smooth out the sound considerably. That's one thing I immediately noticed after I installed the headers; the coarseness of the sound was gone. Now, for me personally, I was kinda disappointed because I loved the coarse/aggressive sound. But for you, it may be just the thing. The reason the Stillen headers do this is because they are equal length pipes. The stock manifold is not -- close, but not quite. The unequal length pipes is what gives off that coarse, aggressive sound. I have an interior sound video clip of my full setup (G3, headers, HFC, CBE). Have you seen it yet?

john370z · 06-19-2009, 12:22 PM

Quote:

Originally Posted by semtex

John, I forgot to tell you earlier -- adding the Stillen headers will smooth out the sound considerably. That's one thing I immediately noticed after I installed the headers; the coarseness of the sound was gone. Now, for me personally, I was kinda disappointed because I loved the coarse/aggressive sound. But for you, it may be just the thing. The reason the Stillen headers do this is because they are equal length pipes. The stock manifold is not -- close, but not quite. The unequal length pipes is what gives off that coarse, aggressive sound. I have an interior sound video clip of my full setup (G3, headers, HFC, CBE). Have you seen it yet?

I believe you did tell me that. That is great advice. I am looking to kill that drone under med-hard acceleration found between the 3K-5K RPM range. Do you think removing the Berk HFC will accomplish this? And leave the Stillen CBE? Or the other way around?

semtex · 06-19-2009, 12:30 PM

Quote:

Originally Posted by john370z

I believe you did tell me that. That is great advice. I am looking to kill that drone under med-hard acceleration found between the 3K-5K RPM range. Do you think removing the Berk HFC will accomplish this? And leave the Stillen CBE? Or the other way around?

Huh? My advice in my previous post was to consider keeping both and adding the Stillen headers, as the headers smooth out all the rough edges (plus give you a modest gain as an added bonus!).

semtex · 06-19-2009, 12:35 PM

John,

This is what my car sounds like, after adding the headers. It's not quieter per se, but the tone is smoother, if that makes any sense. You know what your car sounds like. Now compare with how my car sounds.

YouTube - 370Z w/ Full Intake & Exhaust Mods

kannibul · 06-19-2009, 12:50 PM

Quote:

Originally Posted by semtex

John,

This is what my car sounds like, after adding the headers. It's not quieter per se, but the tone is smoother, if that makes any sense. You know what your car sounds like. Now compare with how my car sounds.

YouTube - 370Z w/ Full Intake & Exhaust Mods

Hmm, given that, that set up might be too loud for me

Hmm...

semtex · 06-19-2009, 01:01 PM

Quote:

Originally Posted by kannibul

Hmm, given that, that set up might be too loud for me

Hmm...

That's funny. I wish my car was louder. Both my previous cars were louder so that's what I'm used to!

Phimosis · 06-20-2009, 09:44 PM

Quote:

Originally Posted by kannibul

Hmm, given that, that set up might be too loud for me

Hmm...

Lol. It's not that loud. It's his microphone. The exahust is no lounder than the turn signals. clunk, clunk, clunk, clunk, clunk, clunk.

tooohip · 06-20-2009, 09:45 PM

...

2bits · 06-22-2009, 01:50 PM

No need to be so self-deprecating. If you want a car that doesn't drone as much, that's perfectly fine. Try to get what you want, and maybe you'll get it (and maybe not!). I really hate it when someone has a problem and the response they get is "you should have bought a [Volvo/Prius]", or "learn to live with it".

Sounds like you chose the right course. As mentioned, "drone" is where the exhaust frequency matches the resonant frequency of a panel in the cabin. The fix is to reduce exhaust sound, change the frequency of the exhaust, or change the frequency of the panel which is resonating.

I would start with the hatch floor, and work your way forward until it's resolved. Focus on the middle areas which are directly above the exhaust. Sound deadening isn't that heavy (~.5 lbs per sq ft.), so as long as you aren't a weight freak I don't consider that a huge concern. GL.

Modshack · 06-19-2009, 01:00 PM

Quote:

Originally Posted by semtex

John,

This is what my car sounds like, after adding the headers. It's not quieter per se, but the tone is smoother,

One man's drone is another man's music.....

john370z · 06-19-2009, 01:30 PM

I need to disclose again...I am sorry I am being a wussy about this. And thank you all for all your advice and help! I am a little leary about adding headers. I hear ya on smoothing out the sound but it is not the rasp that is bothersom. I also am on the fence if my car is droning too much or is it tollerable. We all here like to fix "problems" we find in our cars and many times I find the drone to be a problem and other times I love the "power" sound and added performance (usually pulling away from a sti) LOL. I apologize for my ambiguity...and appreciate all your advice...
john

john370z · 06-19-2009, 06:01 PM

I think I am suffering from acute male vaginatis. I do love the sound and sometimes forget why I got this car and what it is good for. I appreciate all your help and advice. I think I will add sound deadining to the trunk area. I think that might take the edge off. Any advice as the best sound deadening stuff at the best price?

06-18-2009, 07:18 PM	#2 (permalink)
tru_Asiatik Track Member Join Date: Feb 2009 Location: so cal Posts: 793 Drives: 2009 370Z 6MT Rep Power: 272	my mods listed in my sig even with them i think i too quiet its not as loud and deep sounding as my celica with tanabe exhaust and aem intake __________________ Stillen G3 CAIStillen CBEBerk's HFCEibach ProkitHotchkis Swaysichiba 15/20mm spacers? Oil coolerStillen PulleyStillen Headers

06-18-2009, 09:30 PM	#3 (permalink)
john370z Base Member Join Date: Jan 2009 Location: new mexico Posts: 141 Drives: 2007 335i coupe Rep Power: 285	Excellent advice!!! Thank you! __________________ 2009 370Z, Had Berk HFC and un-installed them cuz too noisy!, Stillen CBE, 10mm rear wheel spacer, K&N drop in filters. Blower to come...

06-19-2009, 10:40 AM	#4 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 55 Posts: 5,995 Drives: People to drink Rep Power: 34	John, I forgot to tell you earlier -- adding the Stillen headers will smooth out the sound considerably. That's one thing I immediately noticed after I installed the headers; the coarseness of the sound was gone. Now, for me personally, I was kinda disappointed because I loved the coarse/aggressive sound. But for you, it may be just the thing. The reason the Stillen headers do this is because they are equal length pipes. The stock manifold is not -- close, but not quite. The unequal length pipes is what gives off that coarse, aggressive sound. I have an interior sound video clip of my full setup (G3, headers, HFC, CBE). Have you seen it yet? __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

06-19-2009, 12:35 PM	#7 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 55 Posts: 5,995 Drives: People to drink Rep Power: 34	John, This is what my car sounds like, after adding the headers. It's not quieter per se, but the tone is smoother, if that makes any sense. You know what your car sounds like. Now compare with how my car sounds. YouTube - 370Z w/ Full Intake & Exhaust Mods __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

06-20-2009, 09:45 PM	#11 (permalink)
tooohip A True Z Fanatic Join Date: May 2009 Location: Columbia, MD Posts: 1,626 Drives: 09 370z CY To/Sp Rep Power: 272	... __________________ Lance KW Variant 3 Coilovers \| Stillen Sways \| Stillen Gen III Intake \| AAM HFC \| AAM True Dual CBE \| AAM Comp Oil Cooler \| Hawk HPS Pads \| Volk TE-37 \| Hoser Keg Tap

06-18-2009, 07:09 PM	#1 (permalink)
edeeZee Track Member Join Date: May 2009 Location: s. cali, los angeles Posts: 627 Drives: 09 370z plat 6 speed Rep Power: 268	a) give them to me for free b) just deal with it c) use those squishy ear plugs when driving d) none of the above

06-22-2009, 01:50 PM	#12 (permalink)
2bits Base Member Join Date: Mar 2009 Location: Seattle Posts: 118 Drives: 09 370Z Blk Sp 7AT Rep Power: 18	No need to be so self-deprecating. If you want a car that doesn't drone as much, that's perfectly fine. Try to get what you want, and maybe you'll get it (and maybe not!). I really hate it when someone has a problem and the response they get is "you should have bought a [Volvo/Prius]", or "learn to live with it". Sounds like you chose the right course. As mentioned, "drone" is where the exhaust frequency matches the resonant frequency of a panel in the cabin. The fix is to reduce exhaust sound, change the frequency of the exhaust, or change the frequency of the panel which is resonating. I would start with the hatch floor, and work your way forward until it's resolved. Focus on the middle areas which are directly above the exhaust. Sound deadening isn't that heavy (~.5 lbs per sq ft.), so as long as you aren't a weight freak I don't consider that a huge concern. GL.

06-19-2009, 01:30 PM	#14 (permalink)
john370z Base Member Join Date: Jan 2009 Location: new mexico Posts: 141 Drives: 2007 335i coupe Rep Power: 285	I need to disclose again...I am sorry I am being a wussy about this. And thank you all for all your advice and help! I am a little leary about adding headers. I hear ya on smoothing out the sound but it is not the rasp that is bothersom. I also am on the fence if my car is droning too much or is it tollerable. We all here like to fix "problems" we find in our cars and many times I find the drone to be a problem and other times I love the "power" sound and added performance (usually pulling away from a sti) LOL. I apologize for my ambiguity...and appreciate all your advice... john __________________ 2009 370Z, Had Berk HFC and un-installed them cuz too noisy!, Stillen CBE, 10mm rear wheel spacer, K&N drop in filters. Blower to come...

06-19-2009, 06:01 PM	#15 (permalink)
john370z Base Member Join Date: Jan 2009 Location: new mexico Posts: 141 Drives: 2007 335i coupe Rep Power: 285	I think I am suffering from acute male vaginatis. I do love the sound and sometimes forget why I got this car and what it is good for. I appreciate all your help and advice. I think I will add sound deadining to the trunk area. I think that might take the edge off. Any advice as the best sound deadening stuff at the best price? __________________ 2009 370Z, Had Berk HFC and un-installed them cuz too noisy!, Stillen CBE, 10mm rear wheel spacer, K&N drop in filters. Blower to come...