Advice On Drone/Hum at 70mph
Thread Starter
Burning Brakes
Joined: Dec 2009
Posts: 1,119
Likes: 96
From: Asheville NC
Advice On Drone/Hum at 70mph
I resently test drove a C6 with headers and a Borla Exhaust. The car ran great but at 70mph and in 6th gear the exhaust was loud. There was a defenite drone/hum. I was wondering if there is a way to fix the drone short of replacing the Borla with a stock exhaust. If I put the car into 5th gear the drone went away.
Last edited by traderfjp; Feb 10, 2010 at 05:53 PM.
Instructor
Joined: Oct 2008
Posts: 196
Likes: 0
From: South St Paul Minnesota
Are they Borla Stingers or Touring, I'm guessing stingers? Stingers are loader than the Touring. They make a noise deadning system that might help. But other than changing the mufflers there is not mcuh else you can do that I know of.
http://forums.corvetteforum.com/c6-p...oductions.html
http://forums.corvetteforum.com/c6-p...oductions.html
Melting Slicks
Joined: Apr 2007
Posts: 3,290
Likes: 0
From: Willow Springs IL
You think the Borla's drone? Try Flowmasters. They are absolutely horrible. They sound great but the drone on the highway is intolerable. The only thing you can do if you want to keep the exhaust is drive in a lower gear to keep the motor out of that RPM range where it drones. For me 6th gear is useless at anything under 85mph.
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Thread Starter
Burning Brakes
Joined: Dec 2009
Posts: 1,119
Likes: 96
From: Asheville NC
The car with the headers and drone was just sold. I missed a great deal too. I've read where some users put on headers and a free flowing exhaust and then have lower times at the track. Is this just poor driving skills or are headers not worth the effort/money?
Thread Starter
Burning Brakes
Joined: Dec 2009
Posts: 1,119
Likes: 96
From: Asheville NC
How does the exhaust on the Z06 work. I read that there is a switch to open or close the baffles to give the driver the best of both worlds. Is this correct? I guess GM is the only place to buy one? Is it worth it?
Pro
Joined: Nov 2007
Posts: 710
Likes: 0
From: Northern Florida
I resently test drove a C6 with headers and a Borla Exhaust. The car ran great but at 70mph and in 6th gear the exhaust was loud. There was a defenite drone/hum. I was wondering if there is a way to fix the drone short of replacing the Borla with a stock exhaust. If I put the car into 5th gear the drone went away.
We know from expirience!!!
Melting Slicks
Joined: Nov 2005
Posts: 2,345
Likes: 2
From: Houston 06 C6 Ysi SC 402 fgd TX
you can buy used Z06 mufflers on the for sale forum just about any day of the week
Race Director
Joined: Oct 1999
Posts: 13,298
Likes: 14
From: Somers NY
I had a 96 that I bought new wayyyyy back then... I drag race so the first thing I did was put on headers, and (I forget the brand) and Flowmaster mufflers... Now for me its a 100 mile drive ONE WAY to the track, the drone was so bad, I bought another brand of after market muffler... same results (Drone)... finally I got Muffler eliminators for the C4.. basically its just a straight pipe "No Muffle at all" the only muffler I had was the resonater...
It about drove me nuts, I eventually went back to the STOCK OEM muffler... the car was only .15 slower in the 1/4 but I could listen to the radio, and have a conversation with any passenger in my car..
Fast forward to now I have a C6 also Automatic, and I still drag race, I have done some mods , (Converter, Headers, CAI, 160 T Stat... but the STOCK MUFFLERS are still on it, and I'll never change to any after market muffler unless its a TRACK ONLY car... I must be getting real "OLD" as I enjoy taking a long ride, and enjoy listening to more than just a loud exhaust!!
It about drove me nuts, I eventually went back to the STOCK OEM muffler... the car was only .15 slower in the 1/4 but I could listen to the radio, and have a conversation with any passenger in my car..
Fast forward to now I have a C6 also Automatic, and I still drag race, I have done some mods , (Converter, Headers, CAI, 160 T Stat... but the STOCK MUFFLERS are still on it, and I'll never change to any after market muffler unless its a TRACK ONLY car... I must be getting real "OLD" as I enjoy taking a long ride, and enjoy listening to more than just a loud exhaust!!
Race Director
Joined: Oct 1999
Posts: 13,298
Likes: 14
From: Somers NY
Race Director
Joined: Mar 2007
Posts: 11,331
Likes: 18
From: Missouri City Texas
At 70 mph I ride in 5th gear with my catless longtubes and borla stingers...it sounds great (you get the exhaust tone, not drone in 5th gear). 6th gear at 70 is pretty terrible though.
Intermediate
Joined: Nov 2009
Posts: 49
Likes: 0
From: Denver Colorado
I resently test drove a C6 with headers and a Borla Exhaust. The car ran great but at 70mph and in 6th gear the exhaust was loud. There was a defenite drone/hum. I was wondering if there is a way to fix the drone short of replacing the Borla with a stock exhaust. If I put the car into 5th gear the drone went away.