10-01-2020, 03:08 PM | #89 | |
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I am still waiting on my downpipe install since only a specific shop is willing to install it due to it not being a 100% fit, will keep you updated!
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10-02-2020, 03:37 AM | #90 | |
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I would love to install a set of catless DPs and go get it re-dynotuned. I have no doubt it would be worth at least an additional 50-60 hp.... maybe more. no can do for me though. Not sure when I'm moving back to the US. Not sure where I'm moving to... and not sure what the customs inspection will be like when attempting to re-import a car to the US. I'm just not going to risk it. So... what DPs did you buy that make them "not an exact fit"? Assuming the bellmouth portion bolts up directly to the exhaust flange on the turbo, I can't imagine it would be a terribly difficult installation. The exhausts on our cars (unlike everything else) is surprisingly simple.
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10-02-2020, 12:31 PM | #91 | |
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Just an FYI, downpipes add little power. The decreased back pressure lowers cylinder temps and you can run more boost and a more aggressive timing curve. That is where the power comes from. |
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10-04-2020, 09:13 PM | #92 |
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[QUOTE=Ninefourteener;26741998]Video is uploading to YouTube as we speak. Will post in a few minutes.
US spec (no OPF sensors or secondary cats) Stock downpipes, stock muffler with flapper valves welded open permanently. Resonator deleted. Custom 3" double H-pipe installed, with cross sections 12" apart from one another. Cold start. Happy with tone.. very rumbly and low Happy with the lack of crackles and pops (I don't care for that) Not as happy with "volume". I expected more. Barely noticeable inside the car. Zero drone whatsoever. Noticeable 800-2000 rpms.... and at full acceleration. Otherwise, no difference in volume from stock. [/QUOTES] I think it sounds great. Excellent job. |
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10-14-2020, 09:06 AM | #94 | |
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Will upload once I get the car back
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10-15-2020, 06:10 AM | #95 |
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10-15-2020, 10:48 AM | #97 |
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Sounds Dope
I just got mine installed and initial impression is that it is much raspier (resonator delete) much more burbles and you can finally hear the turbos in sports plus. In comfort, it sounds like stock I'll take a few videos later on as well
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10-15-2020, 12:14 PM | #98 |
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Way too raspy with the 200 cell downpipes and resonator delete
Ill be going tomorrow to muffler shop to either close the exhaust valves or do H pipe set up
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10-15-2020, 03:36 PM | #99 | |
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Sounds fine to me but that is a matter of personal taste and the sound on the vid may not have captured it exactly. I'll be interested to see your logs with JB4 after the downpipe install as well as your SOTP evaluation of any additional power increase. |
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10-15-2020, 03:39 PM | #100 |
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ill run some logs tomorrow on the way to the shop and let you guys kniw
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10-15-2020, 04:59 PM | #102 |
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Tim I think an H or X pipe will be less raspy and improves the sound. My old F80 M3 sounds so much better after I got x pipe midpipe.
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10-16-2020, 10:46 AM | #103 |
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10-16-2020, 12:45 PM | #104 |
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I like the sound of that and the Wife is wanting more rumble. I'm wondering if the Cats for the X5M50i are the same as my X6M50i. We all know how they like to do things differently at times. Where did you pick up the 200cell Cats from?
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10-16-2020, 03:49 PM | #105 | |
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10-17-2020, 08:46 AM | #106 |
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Yea changing the Cats out will give the exhaust a different smell. I live in Texas and put long tube headers on my 2006 Tacoma with Cat delete. it smells like crazy.
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2024 X3 M40i. wife says no Mods since it's aLease.. I see a JB4 tune in the near future.
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10-19-2020, 06:11 PM | #107 | ||
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Mine hardly have a hint of smell and that's when I'm pushing the car
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10-19-2020, 06:18 PM | #108 | |
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I'll try to get some this week, this car is raspy as hell after the downpipes, resonator delete and having the exhaust actuators open. need to get that sorted out tomorrow.
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10-19-2020, 06:32 PM | #109 | |
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10-20-2020, 05:07 AM | #110 | |||
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