Drone dual pipes resonators quiet single

[zgeezer]

I have my 5.3 with AT and Sanderson shorty headers installed.

 

I need practical advice relating to quiet exhaust with little or no rpm related "drone".

 

My design goal is to have a quiet vehicle with no drone in the cabin at cruise speeds. I'm looking at 2000 rpm -2300 rpm.

 

Right now I'm considering the following two designs and variations.

 

Design 1 is 2.25 pipes into one X pipe continuing into a muffler with two 2.25 inlets and one 3.0 exhaust. Tip would extend out even with or slightly short of the bumper.

 

Design 2 would be 2.25 inch pipes into one y pipe with 2.25 inlets and one 3.0 exit into a single muffle with 3 inch inlet and exit. Same tip location as Design 1.

 

Design 3 A variation of design 1 would be to use a 2.5 inch pipe, with inserts, to an X pipe with 2.5 inch inlets with 2.25 inch exhaust and then out to the same rear muffler (2 x 2.25 in and 1 x 3.00 inch out).

 

I understand that the exhaust system is only one part of the complete "quiet" system; the other being lots of sound proofing and dampening material in the cabin. This is well into the works.

 

Does anyone have any practical experience relating to the effect exhaust tube size, X pipes or straight cross over pipes, or multiple

"in line" muffles might have on "quiet".

 

"Quiet", I define as stock late model GT Mustangs or Camaros before they are fitted with aftermarket pipes.

 

I like to carry on conversations with my passenger at cruise without shouting and to enter any cafe after 6 hours in the car and understand that soft spoken waitress without lip reading.

 

Any suggestions?

 

g

[jay260z]

The borla XR1 mufflers have a nice sound at idle but are quiet while you drive and do not drone the only donwside is the price of them.