01-06-2015, 01:52 PM | #45 |
First Lieutenant
119
Rep 373
Posts |
I had a little rattle on cold start & while revving the car slightly.
I installed Gintani Catless Dp's yesterday. They sound great BUT the rattle has increased drastically while revving and driving the car. I thought it was the flaps, being that I have them unplugged...Was told it was my waste gates....??? |
Appreciate
0
|
01-07-2015, 12:00 PM | #46 | |
Part Time Firetruck Crash Barrier
786
Rep 1,562
Posts |
Quote:
Actually to add to that its not necessarily just a rattle that bothers me, its more the unbelievable decible level for low RPMS which really just doesn't sound so great. The car sounds great loud at higher revs, but being extra loud during cold starts at 1400/1500 RPMS isn't my favorite symphony.
__________________
m340ix Mineral Grey/Tacora Red |
|
Appreciate
0
|
01-07-2015, 09:13 PM | #47 | |
Major
340
Rep 1,089
Posts |
Quote:
|
|
Appreciate
0
|
01-08-2015, 05:07 PM | #50 |
First Lieutenant
119
Rep 373
Posts |
With basically the same set up as you, I am experiencing the rattle as well. I was told you hear the wastegates a lot more with the catless Dp's and stock exhaust because it is not deep/loud enough to cover the rattling noise. I'm surprised you still hear it with the akra..
|
Appreciate
0
|
01-08-2015, 05:12 PM | #51 | |
Second Lieutenant
47
Rep 287
Posts
Drives: '15 GT-R, '02 996TT
Join Date: Mar 2014
Location: Las Vegas, NV | San Diego, CA
|
Quote:
|
|
Appreciate
0
|
01-11-2016, 08:44 PM | #52 |
Lieutenant
94
Rep 425
Posts |
There are two possible rattles, as others have already mentioned in this thread. Most often it is the exhaust flaps. We have installed our VSC-2 valve controller on a car with a rattle and can instantly hear it stop by opening the valves. For this problem, you can also try lubricating the bushings for the valve shafts as that will allow more torque to apply pressure on the flap, due to less frictional losses. Test this with a little WD-40 and if it helps, buy something designed for high temp like this:
http://www.amazon.com/gp/aw/d/B000WK...wGL&ref=plSrch The other possible rattle source is the wastegates. Our shop f30 335i had a little bit of this with a catless dp but went away when we installed our new catted dp. If this is your problem, definitely expect it to get worse if you install catless dp's. Of course, in any case you may just want to pickup a VSC-2 |
Appreciate
0
|
01-12-2016, 07:34 AM | #53 | |
Private First Class
23
Rep 121
Posts |
Quote:
For the record, the rattle was coming from the carbon fiber tips. |
|
Appreciate
0
|
01-12-2016, 07:41 AM | #54 |
Private First Class
23
Rep 121
Posts |
For me , it was the clamps on the large diameter pipes nect to the muffler. Because they were loose, the whole muffler and tailpipes were able to vibrate much more than normal. This caused the tips to make the noise, but they werent actually loose.
|
Appreciate
0
|
01-12-2016, 09:47 AM | #55 |
First Lieutenant
55
Rep 328
Posts |
Finally got around to bringing mine for service last week. Two heat shield nuts loose and they realigned and secured the clamps.
The rattle is only marginally better. I am about to call again. Such a hassle. I have the MPE with CF tips. |
Appreciate
0
|
01-13-2016, 08:18 AM | #56 |
Captain
250
Rep 986
Posts |
Its pretty cold here in the morning in Miami, we get down to like 55 and ive noticed the past 2 days that my car rattles on cold start, after the car warms up it goes away.
__________________
2015 BMW///M4 - Austin Yellow - Burger Tuning JB4 Stage 2 - Velos Wheel Design ECU Tune - HRE S101 - Eurocharged downpipes - Meisterschaft GT2
|
Appreciate
0
|
Post Reply |
Bookmarks |
Tags |
exhaust, f82 m4, rattle, rattling |
Thread Tools | Search this Thread |
|
|