Do verts drone like coupes?
Le Mans Master
Joined: Jun 2007
Posts: 7,610
Likes: 12
I would imagine this to be because the vert puts the rear wheel wells behind the trunk firewall, while the coupe does not. Also the angle of the coupe's back window channels road noise forward to the driver.
Safety Car
Joined: Nov 2007
Posts: 4,446
Likes: 314
From: Tarpon Springs FL
FL Events Coordinator
Pro
Joined: Aug 2008
Posts: 694
Likes: 3
From: West Linn OR
Ok Beethoven
My convertible was nosier than chit until I added two layers of dynomat throughout car (3 @ rear wheel wells-2 inside-one outside) and a rear cargo mat.Oh and Tuesday @ 5pm I am being tested for hearing aids.
I wonder if I had normal hearing how bad the noise would be?
:
Racer
Joined: Mar 2011
Posts: 472
Likes: 1
From: Boca Raton Florida
I have an 05 with Flow Masters. Drone is a real problem if you put the engine on a pull at a higher gear. If I run it in a lower gear and at higher rpm, drone goes away. If anyone has a solution to this let me know. I heard that I may be able to put some type of baffle in the pipes and it will cut the resonance, but, I am getting into an area that I know nothing about. In answer to the original post: When I take the top off - no drone at all. Hum, wonder why?
Erwin
Erwin
Safety Car
Joined: Dec 2009
Posts: 4,194
Likes: 305
From: Lake Havasu City Arizona
SoCal Events Coordinator
St. Jude Donor '12
Yes there was drone on both the verts and the coupes. Maybe not as bad on the vert. If you have a manual trans, just shift out of the drone zone, no big deal. If you have an auto, well......sol.
Drifting
Joined: Apr 2000
Posts: 1,655
Likes: 15
From: Jeffersonville In
Cruise-In I Veteran
Cruise-In II Veteran
Cruise-In III Veteran
Factory exhaust, no or minimal drone on either. Three C 5 and C6 Verts and aftermarket drone at 1500 to 1700 rpm, slight with B&B and Corsa Sport. The best is Corsa Sport. minimal drone at that rpm range. magnaflow on modified 2000 vert, loud at 1500 to 2000 rpm. The cure was go to a lower gear.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
5 Best & 5 Worst Corvette Daily Drivers
Joe Kucinski
The Headlights of Every Corvette Generation Explained
Joe Kucinski
5 Best & 5 Most Overrated Corvette Track Packages of All Time!
Joe Kucinski
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
Melting Slicks
Joined: Mar 2007
Posts: 3,327
Likes: 166
From: Summerton SC
Tech Contributor
My '09 vert is quieter than the '09 coupe a friend of mine has, we went back and forth listening and we both agreed the vert was more quiet. Same basic mods, exhaust and tires ... 
Burning Brakes
Joined: Jan 2005
Posts: 915
Likes: 3
From: Ft. Worth Texas
I agree, my 11 GS vert is considerably quiter than my 09 coupe with z51 was, both have bi mode exhaust. Road noise is also less in the vert.
Team Owner
Joined: Sep 2000
Posts: 25,029
Likes: 2,719
From: Far NW 'burbs of Chicago
St. Jude Donor '13
Everyone makes their own choices; but to me, needing to shift to a different gear because of drone means you have the wrong exhaust on the car for you. Our personal choice is NPP with MTW.
Your car, your money, your choice.
Safety Car
Joined: Sep 2006
Posts: 4,075
Likes: 6
From: Wilmington NC
I have a small amount of drone even with the NPP valves closed and it does get reduced when I remove the top.
Drifting
Joined: Aug 2003
Posts: 1,424
Likes: 0
From: Lakeland FL
I have a vert with auto. I am cammed with long tube headers and x-pipe. I had NPPs and have recently switched to B&B Fusions. Drone was absolutely horrible with the NPPs from 1200 RPM to about 1700 RPM. With Fusions, it is still absolutely horrible but the RPM range seems a bit narrower; 1400 - 1600 or so. On a stock engine maybe a vert is quieter but with mods, the drone will absolutely kill your ears if the mufflers are open. All this is with a layer of Dynamat extreme and a Dynamat sound deadening pad in the back. Neither of these additions seemed to help. YMMV.
Le Mans Master
Joined: Jun 2007
Posts: 7,610
Likes: 12
