on my set up i dont get that popping noise under wot only with the cutouts opens. i have almost the same exact set up , lt's to gutted magnaflow cats, magnaflow 22 ich muffler with x pipe. and duals out the side, dual 3 from collector back.

 

This is at 11.6 afr so its not from running rich. Its not really a poping it just reminds me of straight pipes.

 

Anyone have any sound clips of 50series Flows? Ideas?

It pisses me off because I love the sound other then the 100% TPS crackle it has. Actually I need to hear it outside the truck, who knows maybe it sounds good??????

 

Here's a dyno/sound/video clip of a supercharged LS1 with Borla XR-1's and no rasp:

http://www.ls1sounds.com/true_duals/...arger_dyno.avi

 

I'm not S/C but have a 6.0 with ory and 12468 magnaflow (built in xpipe like yours.) I noticed the Magnaflow was super quiet when it was first installed (like a factory mustang gt.) As time went by, the packing burnt out or something, now it sounds loud as sh**!!! Wonder if Magnaflow knows about this?

 

Mine was the same way.. I imagine the are well aware, its the nature of the beast.

 

Still havent figured this out...

 

Is the crackling sound raw fuel popping? Do you get it more on abrupt throttle closing?

 

I dont get it at all on throttle closing, only above 90% throttle or so. Shouldnt be raw fuel, 11.6 afr.

 

Maybe time for a longer/bigger muffler!?!