01-21-2020, 06:31 AM | #1 |
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Are all "ABC" delete options equal?...
I'm most likely going full delete soon and wonder about the varying quality and brands from the four choices I am looking at. Buzzken, Rawtek, ATM and Unobtainium.
I would prefer one that has minimal drone (if any) and will be utilizing a catalytic. Are all of these good choices? I dont think I've read bad things about either. Thank you.
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01-21-2020, 07:36 AM | #2 | |
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I will be going with a catless rawtek on my x5 though.
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02-19-2020, 09:37 AM | #3 |
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Buzzken just recently updated their down pipe with a new cat that really reduces the smell if smell is something of concern for you. That started around mid-December.
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02-19-2020, 12:21 PM | #4 | |
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02-19-2020, 07:14 PM | #5 | |
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I'll be doing a complete vacuum system refresh on my x5d fairly soon here so maybe I can report back. My x5 sounds very weird sometimes though... then other times I can hear both turbos spool up together like in my 335d.
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02-20-2020, 08:09 AM | #6 |
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Directly related to spool level, but I can't really tell which turbo.
Light throttle, constant or accelerating from a stop, I roll into the throttle. Immediately, I get a high-ish pitched "whoo sound" that happens RIGHT before I hear the whistle of the small turbo, and it's just as loud if not louder than the whistle. You can year it really well in this video, I apologize for it being sideways and the jackhammering. Make sure your volume is initially low if you have headphones in! It's kind of a lazily responding sound to throttle. Goes away with REALLY heavy throttle. Has always made me think that maybe it's my big turbo, but she doesn't smoke any oil out, and it hits boost/ boost req just fine. I would ABSOLUTELY love to get rid of it. I just want my pure sweet diesel whistles on their own! I havent checked many things- I need to check the exhaust banjo bolt, I need to replace the seals on my very oily red boost pipe, and I havent run any sort of smoke test on the intake tract, and I believe I have leaky swirl flaps. I don't hear any crazy boost leaks like I had on my n54 once, but other than the turbo or an intake whistle leak, I'm not sure what it would be.
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Last edited by Spyro235; 02-20-2020 at 08:16 AM.. |
02-20-2020, 10:31 AM | #7 | |
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The boost pipe could be culprit too. I know x5s are a bitch to replace needing the whole front bumper cover removed... I hope to do it once only and never again so I bought an atm intercooler on Black Friday which is still not in-stock I would delete the swirl flaps anyways, and make sure if you pull the intake multiple times to change the gaskets. 90% of the time it's the vacuum system though. Just my experience with it. My 335d is just now running perfect because I've been chasing funny turbo noises for a year now and I had a hunch that something in the vacuum system was still messed up... even though I completely redid everything. Turns out I pinched my vacuum line under the first runner of the intake and I was leaking boost a little bit and the vacuum line was leaking vacuum. Fixed it and I can hear my turbos spool up harmoniously now and I only hear normal noises when I let off
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02-20-2020, 11:02 AM | #8 | |
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I get normal noises when letting off other than the whir spooling down. Give it a listen, let me know if that's what you heard. Front bumper cover is coming off this weekend for lightbar install, front DEF tank removal, and boost pipe seals. Next time I tow, if my iat's are climbing to where I don't want them, I'm just going to splurge on the ATM upgrade. If it keeps me cool while towing, that's what matters when I'm towing my drift car thousands of miles. |
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02-20-2020, 01:48 PM | #9 | |
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Exhaust sounds good btw! I could hear that spool from the exhaust Edit: this is my 335d "spooling" up
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02-24-2020, 08:50 AM | #10 | |
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And thanks! I LOVE the way this thing sounds. I just wish I could listen to the whistle without the whoo! And if the LP turbo ends up being the culprit and needing replaced.... I've got to do some research to make sure it's something I would want to do, or maybe I'd just pay a shop to do it. but maybe I'd put in an upgraded one... Who knows. At the end of the day I do have enough power for what I use it for, but if a turbo's coming out anyway............................
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02-24-2020, 10:24 AM | #11 | |
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I'd say it's the HP turbo though, the big turbo doesn't get spooling on its own till about 3k rpm. If you can get a video in maybe 3rd or 4th and get a good sound clip going from 1500-4000rpm medium throttle that'll give you a good idea which turbo is making noises. Other than that there's no easy way to check the hp turbo for play only the LP turbo. Pretty good reason to upgrade to hybrids though
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02-24-2020, 10:39 AM | #12 | ||
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If you can manage it yourself I would do the turbo yourself and replace all your oil lines. Unless you know a shop that really knows what they're doing with our engine. And if you can afford the full upgrade I'd do both HP and LP turbos.
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02-24-2020, 10:47 AM | #13 | |
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Truthfully, I'm not nervous about the job so long as it went well. But, snap a stud, break a bolt, and all the sudden I'm without a vehicle and pulling the motor to fix it. THAT makes me nervous.
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02-24-2020, 11:02 AM | #14 | |
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