happy women FTW!

If there is temperature change in the exhaust due to outside ambient temps the speed of sound will change and the wave length will also be affected.

Frequency=Speed of sound/Wave Length

This may be a non-issue if the exhaust temps are not affected much by the outside temps.

my 2 cents

:gtfo2:

:eek:

http://i561.photobucket.com/albums/s...rize-fight.jpg

Play nice you two! :rofl2:

This is true for the math, but the exhaust temps should be pretty similar despite outside temperatures. Perhaps a bit cooler in the winter but still pretty close. The side branch resonators cover about 15 points of frequency completely and then begin to lose a bit of efficiency. On my car it knocked out all the drone from 2200rpms through 3000rpms. I expect in winter for the car to make a bit more noise but probably not much. Can always report back when its cold outside. :)

lol... i wonder how much power you lost by doing this mod.

Probably... none.

Awesome job man, makes sense. I guess thats why Stillen chose the muffler setup they did and why my car has 0 drone.

Yep, absolutely zero power loss guaranteed (I can attest). The side branches are capped so there is no flow through them really (they are also at 90 degrees from the direction of flow and they are right near the exhaust tips.)

Pics are attached. The black is a 2000* flat black ceramic paint. I covered the whole rear bumper and the tips and mufflers and coated the side branch pipes and connections to the exhaust tips slowly with quick spritzes of paint. Much cleaner looking and no risk of rust. In the last pic, the exhaust tip is about one inch to the right of the black pipe.

Very nice!

People also need to note that you are using Magnaflow race mufflers and NOT the FI cans. :)

Yes, these are Magnaflow 4" stainless resonators (what Magnaflow called them on the box) also the same as race mufflers really since the diameter is smaller than 6". I much prefer them to the size of the FI cans from the rear view, although FI is not really bad looking to start with.

sound clips?

One better, will have a video later tomorrow. We are making it at the TopSpeed grill out meet. :tup:

Good solid technical info, plus 1 rep. I would have purchased an FI exhaust if it weren't for the drone problem. FI should offer this in their product line. Stillen and Berk avoid drone by having a longer exhaust path.

Isnt this technology called the Hemholtz pipes?