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Topic: New exhaust completed now I have Drone issue

in Forum: C4 Fuel, Emission Control, and Exhaust Systems

New exhaust completed now I have Drone issue (1/3)
 9/21/17 5:01pm
Funtoy
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Hatboro, PA - USA

Vette(s):
1985 Coupe


Joined: 4/13/2016
Posts: 1

Hello Everyone,
Ive just completed my car and now have it on the road. 
However, I have a major drone issue. The problem occurs between 1300 and 1800 rpm in all gears. You cannot even think, converse or hear the radio.

I have a Melrose header and exhaust system xpipe with Borla mufflers. 1.75 Primary, 3 Collectors, 3 x Pipe, 3 high flow cats, to 2 Borla 11376 Mufflers. 

I cant afford to change the mufflers, so What would you recommend ?

I am considering this Car Chemistry insert? 

http://www.carchemistry.com/silencer-insert/

Im not really concerned about losing small amounts of horsepower. The car has plenty of power!!

Thanks again!!


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Re: New exhaust completed now I have Drone issue (2/3)
 9/22/17 10:25am
Atchafalaya
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Atchafalaya Basin, LA - USA

Vette(s):
Black 1979 L-82 Black 1996 LT1 Black 1999 Coupe


Joined: 3/20/2009
Posts: 571

Put it on and lose the drone.
 
A little FYI ---
unless the engine and drivetrain is built, the exhaust system doesn't really build/increase HP.
 
On stock/mostly stock motors:
It will however increase torque by a small margin, that most people feel via. "seat of the pants" and equate that feeling to building HP.
(that's basic info without writing a novel to cover everything)
Re: New exhaust completed now I have Drone issue (3/3)
 10/4/17 11:21am
91 Black Convertible
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Nashua, NH - USA

Vette(s):
1991 Black Convertible w/ red interior


Joined: 11/4/2013
Posts: 20

A couple of things that may help, but not cure: make sure the tailpipes extend beyond the bumper and instal some sound deadening material in the cargo area. It made mine more livable.
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