01-03-2024, 06:54 AM | #1 |
New Member
2
Rep 28
Posts |
Installed CG DS-1 High Flow Catted Downpipe - this thing reeks....
I recently installed the CG DS-1 High Flow Catted Downpipe on my 540i. The performance results were positive; slightly increased volume, slight burbles on off throttle, and possibly a placebo effect of the throttle being more responsive, but it's there. I'm currently running BM3 Stage 2 as I'm waiting for the TU fuel pump that I ordered to arrive (when it does I plan to go Stage 2+), but I must say.... this thing smells awful.
I was really hoping that it would smell similar to stock but it truly smells like I'm not using a catalytic converter. I was enjoying a spirited driving around town last night and I was getting nauseas in the car due to the exhaust smell. Unfortunately, I didn't realize that a new downpipe gasket didn't come with the kit until my old downpipe was off the car so I had to reuse the old gasket, but my car is fairly low miles, so I doubt that is the issue as there is no audible exhaust leak. Has anyone else deal with this issue? Does it get better as the car "breaks in" the new cat (doubtful but hopeful). I'm a little upset with the outcome here and I'm thinking about returning the TU pump, putting the old cat back on and just keeping it stage 1 (which sucks as I came from a twin turbo V8 and was hoping to get the legendary bolt on power from the B58). Thanks. |
01-03-2024, 10:18 AM | #2 | |
First Lieutenant
267
Rep 336
Posts |
Quote:
I've no issues with smell into the cabin with my old VRSF sports cat , so you should rule out a leak first
__________________
Pure800, Dorch DS2, VRSF sports cat, MST intake, MHD ECA, XHP, Pureboost.de custom tuned
|
|
Appreciate
0
|
01-03-2024, 10:35 AM | #3 | |
New Member
2
Rep 28
Posts |
Quote:
I'll get a gasket and reinstall this stupid thing. |
|
Appreciate
0
|
01-03-2024, 03:13 PM | #4 |
Joint Chiefs of Staff
24457
Rep 191,382
Posts |
Let us know how it goes
__________________
Check out our current sale by clicking on this link!
https://x-ph.com/sale/ Phone number 702-494-9435 |
Appreciate
0
|
01-05-2024, 02:48 PM | #5 |
New Member
2
Rep 28
Posts |
Turns out there is an audible and visible (leaks condensation + fuel on startup) exhaust at the clamp (not vband) where the downpipe meets up with the exhaust pipe.
To be clear, this is the exhaust clamp that is closer to the rear of the vehicle, not the clamp that connects to the turbo (which is where I reused the gasket). Going to fix it tomorrow and report back. Does anyone know what size exhaust clamp I need for that connection? Might replace the factory one or weld it (which I would prefer to avoid). |
Appreciate
0
|
02-22-2024, 03:02 AM | #6 | |
First Lieutenant
189
Rep 301
Posts |
Quote:
|
|
Appreciate
0
|
02-22-2024, 11:16 AM | #7 | |
Joint Chiefs of Staff
24457
Rep 191,382
Posts |
Quote:
if the smell is strong, the cat might have failed
__________________
Check out our current sale by clicking on this link!
https://x-ph.com/sale/ Phone number 702-494-9435 |
|
Appreciate
0
|
02-29-2024, 01:40 AM | #8 |
First Lieutenant
189
Rep 301
Posts |
|
Appreciate
0
|
03-01-2024, 03:50 PM | #9 |
Major General
2015
Rep 5,071
Posts |
Sure its not just running super rich ? Have you logged the car with at all?
__________________
|
Appreciate
0
|
04-18-2024, 12:01 PM | #10 | |
Colonel
191
Rep 2,233
Posts |
Quote:
|
|
Appreciate
0
|
04-18-2024, 02:50 PM | #11 | |
First Lieutenant
189
Rep 301
Posts |
Quote:
|
|
Appreciate
0
|
04-25-2024, 02:57 PM | #12 |
Major
36
Rep 1,043
Posts |
FWIW I’m getting a bit of an exhaust smell at slow speeds and idle at times with my newly installed vrsf catted.
The installer said the midpipe connection was a bit loose. The factory downpipe came out very easy, almost like the mid pipe was a bit big. The factory band clamp can only close so far and it still wasn’t tight enough. They are saying the solution is to cut off the factory band clamp (it’s spot welded on) and put an aftermarket band clamp on. It’s strange to me as many Vrsf owners have had to use a pipe expander to get theirs to fit…. |
Appreciate
0
|
Post Reply |
Bookmarks |
|
|