MDS, aftermarket exhaust and vibration

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MDS, aftermarket exhaust and vibration - 2/13/2006 6:15:25 PM    74scamp   Posts: 1239 Joined: 1/25/2006 From: Los Lunas, ,NM Status: offline I put the Magnaflow full cat-back exhaust on my 06 R/T. Now, when the DMS kicks in (or tries to), I get a vibration that seems to come from the exhaust. Anyone else have this problem and any fixes or ideas? dave Post #: 1

RE: MDS, aftermarket exhaust and vibration - 2/13/2006 11:46:28 PM    baldyloxs Posts: 1092 Joined: 10/28/2005 Status: offline I put Borla on mine I am gonna have to remove the cross member.I to get some vibration from time to time. (in reply to 74scamp) Post #: 2

RE: MDS, aftermarket exhaust and vibration - 2/14/2006 8:33:25 AM    74scamp   Posts: 1239 Joined: 1/25/2006 From: Los Lunas, ,NM Status: offline baldy, I just put some washers in between the cross member and the floor and got the extra space I needed. This vibration I'm talking about seems to stem from the different exhaust and the difference in exhaust pulses caused when it goes into DMS mode because of the new exhaust. I think that cross member simply acts as a drive shaft "loop" anyway. dave (in reply to baldyloxs) Post #: 3

RE: MDS, aftermarket exhaust and vibration - 2/15/2006 1:57:03 AM    baldyloxs Posts: 1092 Joined: 10/28/2005 Status: offline I believe it sets up up above the shaft if I remember right when I installed mine.I do get rattle out of it i just need to take it back to my buddies and remove it.... its the one by the crossover or xpipe.It had to be removed to install it it only acts as a hanger so if it falls it catches it .Possible be on the gas tank I also I had some there to but I moved it all foward and got rid of that . < Message edited by baldyloxs -- 2/15/2006 1:58:42 AM > (in reply to 74scamp) Post #: 4

RE: MDS, aftermarket exhaust and vibration - 2/15/2006 1:42:56 PM    74scamp   Posts: 1239 Joined: 1/25/2006 From: Los Lunas, ,NM Status: offline baldy - you're right about the cross member - I just put 4 washers on mine between the cross member and the floor of the car and that gave me the clearance I needed there. I don't think the vibration I'm trying to fix comes from a metal-to-metal contact. It's more of a resonance sound/vibration. Again, I think it's caused by the DMS kicking in and running on the 4 cylinders thereby setting up a resonance that can be both heard and felt. Didn't do it before I changed the exhaust. But I will check out the gas tank and see if anything there looks suspicious. dave (in reply to baldyloxs) Post #: 5

RE: MDS, aftermarket exhaust and vibration - 2/15/2006 9:04:59 PM    06REDRAM   Posts: 56 Joined: 1/20/2006 Status: offline I GET IT ,ITS FROM THE MDS TURNING OFF 4 CYLINDERS.DRIVES ME NUTS AT LOW SPEEDS. CANT HEAR IT TO MUCH AT HIGHWAY SPEEDS. YOU REMOVED THE RESONATORS RIGHT ? SOUNDS GO ON ALL EIGHT. ALMOST SOUNDS LIKE YOU HAVE 4 MISSES.IT JUST ECHOS THRU THE 3INCH PIPES. IWAS THINKING IF I PUT THE TAIL PIPE RESONATOR ON MIGHT NOT NOTICE IT AS MUCH, TOM _____________________________ 06 RED RAM SPORT,3IN MAGNAFLOW,AIR RAID, 20 IN,ABS,LEATHER,HEMI, 3.92'S (in reply to 74scamp) Post #: 6

RE: MDS, aftermarket exhaust and vibration - 2/15/2006 10:18:26 PM    74scamp   Posts: 1239 Joined: 1/25/2006 From: Los Lunas, ,NM Status: offline Tom, I have the Magnaflow resonators on. However, at 80-85, it doesn't turn off those 4 cylinders very often. I still get 22-23 mph with it. I also have only 2 1/2 inch pipe. dave (in reply to 06REDRAM) Post #: 7

RE: MDS, aftermarket exhaust and vibration - 2/16/2006 12:32:24 AM    baldyloxs Posts: 1092 Joined: 10/28/2005 Status: offline It sounds like a spark nock or ping I know what you are talking about.Mine comes from right under the back seat and sounds like a thump . (in reply to 74scamp) Post #: 8

RE: MDS, aftermarket exhaust and vibration - 2/16/2006 11:26:06 AM    06REDRAM   Posts: 56 Joined: 1/20/2006 Status: offline DAVE, DOES IT SOUND GOOD WITH THE MAGANAFLOW RESONATORS ? I GUESS THEY HAVE TO BE BETTER THAN STOCK. AT 80 MPH I DONT THINK MDS WOULD KICK ON . _____________________________ 06 RED RAM SPORT,3IN MAGNAFLOW,AIR RAID, 20 IN,ABS,LEATHER,HEMI, 3.92'S (in reply to baldyloxs) Post #: 9

RE: MDS, aftermarket exhaust and vibration - 2/16/2006 11:27:02 AM    06REDRAM   Posts: 56 Joined: 1/20/2006 Status: offline DAVE, DOES IT SOUND GOOD WITH THE MAGANAFLOW RESONATORS ? I GUESS THEY HAVE TO BE BETTER THAN STOCK. AT 80 MPH I DONT THINK MDS WOULD KICK ON . _____________________________ 06 RED RAM SPORT,3IN MAGNAFLOW,AIR RAID, 20 IN,ABS,LEATHER,HEMI, 3.92'S (in reply to baldyloxs) Post #: 10

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