can I have the cake and eat it too?

john370z · 06-18-2009, 05:08 PM

Contrary to what has been said, there is a drone between 3.5K and 5K rep. At least there is in my Z. I guess that is what is most annoying. Does anyone have an opinion as to which is most likely to either remove the drone or substantially improve it: Removing the CBE, Removing the HFC, or adding some type of resonator or something like it in the exhaust track? I plan on adding a supercharger in the future but with the noise issue it is making the car less enjoyable to drive. I appreciate what some of you have said reguarding loving the exhaust note and not listening to the radio etc. But I do love the radio. Thanks for the imput!!!

Modshack · 06-18-2009, 05:16 PM

Quote:

Originally Posted by john370z

Contrary to what has been said, there is a drone between 3.5K and 5K rep. At least there is in my Z. I guess that is what is most annoying. Does anyone have an opinion as to which is most likely to either remove the drone or substantially improve it: Removing the CBE, Removing the HFC, or adding some type of resonator or something like it in the exhaust track? I plan on adding a supercharger in the future but with the noise issue it is making the car less enjoyable to drive. I appreciate what some of you have said reguarding loving the exhaust note and not listening to the radio etc. But I do love the radio. Thanks for the imput!!!

I think you stepped over the line with the HFC's. From Vids I've heard they make a substantial change in the sound level. I have a Stillen Cat back (which seemed pretty tame) and just added a custom intake (which made it just perfect for me). After reading reports here I'd probably have the same issue as you if I went to the HFC's. I think I'll hold where I am...

I think you're going to have to sacrifice one or the other to get the sound levels where you want them.

john370z · 06-18-2009, 06:51 PM

I think you are right!!! Sucks to think I will have to sacrifice about 10 or more WHP by putting the cats back on. Is it everyones opinion that the drone will be gone with only the Stillen CBE on the car?
Thanks for all your input...

Modshack · 06-18-2009, 07:47 PM

Quote:

Originally Posted by john370z

I think you are right!!! Sucks to think I will have to sacrifice about 10 or more WHP by putting the cats back on. Is it everyones opinion that the drone will be gone with only the Stillen CBE on the car?
Thanks for all your input...

John...What you describe is drone for sure. Some people are more sensitive to it, some have it but don't know they do until their wife tells them she's getting a headache..

I had a bit of that with my Vette after adding headers and HFC;s. One thing that helped a lot was a complete sound deadening of the rear hatch area. I used Damplifier from Second skin. It was a bit of work, but dampened the resonances and other noises nicely. I plan to do this to the Z as there is a fair amount of thin, undamped sheet metal back there. For $100 it may solve your problem and give you some other benefits too without pulling off parts.

The back of the vette wa like a big plastic bass drum!

06-18-2009, 05:08 PM	#1 (permalink)
john370z Base Member Join Date: Jan 2009 Location: new mexico Posts: 141 Drives: 2007 335i coupe Rep Power: 284	Contrary to what has been said, there is a drone between 3.5K and 5K rep. At least there is in my Z. I guess that is what is most annoying. Does anyone have an opinion as to which is most likely to either remove the drone or substantially improve it: Removing the CBE, Removing the HFC, or adding some type of resonator or something like it in the exhaust track? I plan on adding a supercharger in the future but with the noise issue it is making the car less enjoyable to drive. I appreciate what some of you have said reguarding loving the exhaust note and not listening to the radio etc. But I do love the radio. Thanks for the imput!!! __________________ 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...

06-18-2009, 06:51 PM	#3 (permalink)
john370z Base Member Join Date: Jan 2009 Location: new mexico Posts: 141 Drives: 2007 335i coupe Rep Power: 284	I think you are right!!! Sucks to think I will have to sacrifice about 10 or more WHP by putting the cats back on. Is it everyones opinion that the drone will be gone with only the Stillen CBE on the car? Thanks for all your input... __________________ 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...