Re: [Chrysler300] 300C/D mufflers

[Gary Barker <gbarker@xxxxxxxxxxxx>]

I have always felt that the drone noise comes from the turned down 
exhaust tips.  The sound waves hitting the ground and bouncing back and 
hitting the under side of the car.  My Superbird is a Calif. car and had 
to have the turn down tips, so when I put new mufflers on last year I 
also put the factory chrome straight back tips. Now it is nice to drive 
in.-   Gary Barker

whuff wrote:

>Hi Group,
>
>I have put Flowmasters on a couple of cars, the latest being a '70 300 with 
>TTI 2.5" exhaust system.  It is my experience that the further behind (or 
>out to the side on a station wagon) the exhaust pipes protrude, the less 
>inside the car drone there is.  By making sure the forward part of the 
>turndown of the exhaust pipe exit was past the rear of the bumper, I ended 
>up with a late 60's type muscle car sound with little or no reverberation 
>inside the car.  Very liveable form inside and outside the car.  Just my 2 
>cents worth.
>
>Bill Huff
>
>At 6/24/04 10:23 AM, you wrote:
>  
>
>>I had the same experience with Flowmasters on my L two years ago. Even using
>>the big 3 chamber Delta flows with an X crossover AND resonators, it was too
>>loud inside. The drone when lifting off the throttle was especially bad. I
>>switched to OEM style mufflers and now it sounds acceptable. I couldn't
>>really detect any loss in performance either. That said, if anyone wants to
>>buy a slightly used (2 weeks) set of flowmasters for 2.5" pipes, I can offer
>>mine cheap.
>>
>>Steve Galezowski
>>300L
>>
>>----- Original Message -----
>>From: "Jack Farris" <jackfarris@xxxxxxxxxxxxx>
>>To: "Owen & Jo Grigg" <ram300@xxxxxxxxxx>; <Chrysler300@xxxxxxxxxxxxxxx>
>>Sent: Wednesday, June 23, 2004 10:59 PM
>>Subject: Re: [Chrysler300] 300C/D mufflers
>>
>>
>>About four years ago, after some mild modifications to the 383 cid engine in
>>my '66 300, I had a 2.5" dual exhaust system installed with 3-chamber Delta
>>Series Flowmasters. The 2.5" pipes ran all the way from the manifolds to the
>>exhaust tips with no stepdown. It sounded great from the outside! The inside
>>was another story. The droning was terrible. The muffler shop said I needed
>>resonators--so I had them installed. Slight improvement, but still too much
>>drone. I called Flowmaster for advice. They said a crossover (H-Pipe) should
>>help. I had that installed. Slight improvement, but still too much drone. I
>>changed out all the hangers to make sure that the system was totally
>>isolated--no improvement.
>>
>>After a couple of months of frustration, I removed the Flowmasters and
>>installed OEM-style Walker mufflers. The droning was gone. The car now
>>sounds great. It has the deep big block burble that I was hoping for in the
>>first place.
>>
>>Jack
>>-------------------------------------------------------------------
>>    
>>
>>>From: "Owen & Jo Grigg" <ram300@xxxxxxxxxx>
>>>Date: Thu, 24 Jun 2004 11:38:47 +1200
>>>To: <Chrysler300@xxxxxxxxxxxxxxx>
>>>Subject: [Chrysler300] 300C/D mufflers
>>>
>>>Hi all
>>>My 300C "driver" is due for a new exhaust system, I was considering going
>>>      
>>>
>>to a
>>    
>>
>>>2.25" system from front to back rather than stepping down to 2" tailpipes
>>>      
>>>
>>as
>>    
>>
>>>original. Would be interested in what others have done? Also what mufflers
>>>      
>>>
>>to
>>    
>>
>>>use to get the most out of the 300C without getting a drone thru the car
>>>      
>>>
>>or a
>>    
>>
>>>headache after five minutes drive. I see Flowmaster are doing a 3 chamber
>>>muffler, has anyone used these? I guess what I'm trying to do is get the
>>>      
>>>
>>hemi
>>    
>>
>>>to breathe a bit better/less restrictive but keep as close to original in
>>>style/look.
>>>I note that Flowmaster recommend the following, which suggests that the
>>>standard system is restrictive?
>>>
>>>
>>>a.. What pipe size should I use for a street application?
>>>In general, the following guidelines should be followed for street
>>>applications.
>>>    2" tubing up to 100 hp per pipe
>>>    2.25" tubing up to 160 hp per pipe
>>>    2.5" tubing up to 200 hp per pipe
>>>    3" tubing up to 300 hp per pipe
>>>
>>>
>>>Thanks.
>>>b.. Owen
>>>c.. Auckland,NZ
>>>      
>>>
>>
>>
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