Tyler_Canada said:
What about using a resonator from the G35 coupe? It's supposed to be freer flowing than even the one on the sedan, which is probably still better than the one on the Murano.
My Dad has a 2004 Murano and my wife is planning to get one too; that muffler/resonator has me intrigued. It seems to be a full muffler, just because of the size; resonators are usually smaller. As such I suppose it brings some power loss and weight, I think it's used to make the vehicle real quiet, luxury like.
Swapping it with a G35 resonator seems a good idea, but you'll have to check it inside. The 240SX resonator is just 1 inch of internal diameter and, even though it's a straight tube, this is restrictive. This type of resonator doesn't change tone as much as it changes volume; it can reduce 3 or 4 decibels of the final sound and it does absorb some vibration.
Using a glasspack type instead will provide for more power, but it will increase the volume of the sound...maybe not much, and also probably will bring some vibration to the system too.
Maybe a better option would be to use something like Dynomax's Ultra-Flo or Super Turbo mufflers. These can be chosen to be the same size and configuration as the one mounted in the Murano and surely will bring more power to the system, without so much an increase in sound and vibration, particularly with the Super Turbo. Also, if installed with the word Dynomax towards the vehicle, maybe technicians won't notice the difference eh.
I don't think the increase in torque will bring trouble with the CVT, the torque-converter is still there to dampen things a bit and, what I've read about the technology, it seems to be quite strong.