06-03-2021, 03:08 PM | #45 | |
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06-12-2021, 01:28 PM | #47 |
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Update
Since starting this thread, it's had a lot of interest, so wanted to give an update. I used a wire tie rather than paper clip on the left side. Easy to hook into a slot on the circumference of the diaphragm and tie off at a bolt hole. Much neater looking. Had done the same on the right side, but used steel wire. Both as tight as can be, not that it's likely the valves would 'slip' closed.
As to sound: at about 850-900 miles I started noticing a burble on the over-run. Have had the 1200 mile service--1100+ on the car now, and the burble and general loudness of the exhaust has increased noticeably. I don't attribute it to the break-in service, but the fact that all exhaust systems "season." With 800-1500 miles, they tend to get louder and deeper. I couldn't be more satisfied with the sound. Again, it will never match the 6.2 NA V8 in my Vette, but for a turbo 3 liter, it really sounds great. You can do a midpipe, cat or resonator delete, or even toss the muffler. That's all personal taste. For me, for zero cost, it's right where I hoped it would be. |
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06-13-2021, 07:27 AM | #48 | |
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I did take mine in for it's 1200 mile service and they didn't say a thing to me about it. They probably didn't even notice but just a heads up for anyone worried about the dealer seeing it. |
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06-13-2021, 11:49 AM | #50 | |
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Even in Sport Plus, the valves seem to rarely be fully open. Please refer to prior posts for explanation. ///AVM |
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06-13-2021, 08:20 PM | #51 |
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Went ahead and gave this a go today. Very easy, although it's a tight squeeze under the car if you don't have a jack.
After about 45 minutes of driving, I noticed a rattle. I inspected the flaps, and both were still in the open position. However, when I went to adjust them, it almost felt as if they had more play in them than before? Guessing this is the rattle. I have not hooked or put wire in place to hold the flap still, so going to try that next and see if it cures the rattle. Car is a lot more throaty, especially under any type of acceleration between 3-4K.
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06-13-2021, 08:26 PM | #52 |
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06-13-2021, 08:28 PM | #53 | |
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Could you use a large zip tie? I'll have to get under there again. A lot easier if you have a jack.
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06-13-2021, 08:46 PM | #55 | |
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06-14-2021, 11:07 AM | #56 |
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Upon further review, the rattle most certainly comes from slight movement in the flap wheel. I also noticed the wheel can compress or press in - I wasn't able to secure it well with the zip tie like I expected, so I'll try the wire tie.
Also, the 'exhaust' button definitely provides real burbles to the exhaust, and not just sound through the speakers.
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06-14-2021, 12:00 PM | #57 | |
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Per our PM exchange - in which I could not attach a pic - below is a pic of the lead-based wire I used. Purchased at Autozone, but I suspect there are other options toward purchase. I used this option because (1) it is metal (not plastic like a zip tie that could potentially melt); and (2) the lead component make it very pliable and easy with which to work, particularly with regard to 'twisting' that secures the valve in place. Best ///AVM Edit: with regard to your follow-up PM after I posted here, you will notice the valve turns and is 'stopped' against a metal bumper when it hits the fully open position; similarly when it reaches its fully closed position. If you loop it through properly in that fully open position it will be secured tightly (against the bumper) as you twist the wire. Last edited by ///AVM; 06-14-2021 at 12:15 PM.. |
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06-14-2021, 12:06 PM | #58 |
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A plastic wire tie works great--the circumference of the diaphragm has slots in it which are easy to put the wire tie through, and then secure it to the top right bolt hole. As I said, I used steel wire on the right side originally with this process and changed out the paperclip on the left with the wire tie--much neater looking. The paperclip was just an experiment when I first did this. Don't worry about heat from the exhaust on the wire tie. It won't get that hot where it is. And either secures it very tightly, so nothing to rattle. I like this process better than using the "lever" that turns the valves. But either works.
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06-14-2021, 01:01 PM | #59 | |
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06-14-2021, 02:39 PM | #60 |
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Just went and redid the setup. Zip tied the plugs up and re-taped them better. Also got a better angel to zip tie the flap open. Wasn't able to get it inside the twist spot, but found enough leverage around the module (didn't go through the bolt hole to make it nice and secure.
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06-14-2021, 02:58 PM | #61 | |
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06-14-2021, 07:39 PM | #62 |
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I have Active sound coded off, and I still have the burbles, I was on track yesterday and every downshift was met with some burbling so tbh at this point I don’t know how coding asd off would stop the burbles? But then again just like the Valves I don’t know why asd is installed on these cars
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06-14-2021, 08:13 PM | #63 | |
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|2021 M4 Competition| |2018 M3 Competition| |1994 525i|
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06-14-2021, 08:33 PM | #64 | ||
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06-14-2021, 08:35 PM | #65 | |||
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|2021 M4 Competition| |2018 M3 Competition| |1994 525i|
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06-15-2021, 12:18 PM | #66 | |
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