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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N57 / M57 Turbo Diesel Discussions - 335d > Red pipe changed for Forge version



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      06-19-2014, 06:36 AM   #1
Si-335d
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Red pipe changed for Forge version

Got this fitted yesterday as I keep getting a leak from the bottom seal. Went on well at the garage and as I have the Wagner FMIC too they modified the bottom clip to ensure a secure fit. Looks neat and tidy. I didn't use the steel jubilee clips it came with, instead I got some stainless steel ones. Cars going well no light and day performance gain but as light throttle inputs on motorways, it does feel more responsive. Maybe the new pipe doesn't stretch as much under pressure or flows slightly better. Time will tell if the leak returns as the bottom fitting does still use the oem seal but the fit was much tighter so I'm quietly optimistic
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      06-19-2014, 06:38 AM   #2
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can you post pics please and gracias for your input anyway
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      06-19-2014, 06:42 AM   #3
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I've had one fitted for circa 6 month it's actually cheaper than an bmw oem pipe.
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      06-19-2014, 06:45 AM   #4
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damn now that sucks LOL
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      06-19-2014, 07:05 AM   #5
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I will try to get a pic or 2 at the weekend.
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      06-19-2014, 07:14 AM   #6
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gracias SI
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      06-25-2014, 01:53 AM   #7
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I was looking at the old red pipe a couple of days ago and noticed that it actuall reduces in size at the FMIC end. Also there is a metal lip inside that reduces it still further. It is certainly NOT a smooth pathway for air flow and from what I can tell the metal lip I mentioned seems to trap oil and that is where the oils seems to be forced through on the bottom seal.

I currently have no leaks but must say my car seems to have foud a new lease of life after getting 100 miles or so on it followingthe fitment. The response is noticably sharper in all gears and has more urgent feel about it when accelerating at all revs. I don;t think it atmospheric related as we are currently have some very hot days but my car is just totally manic right now and I'm loving it

Maybe the improved airflow required some adaptions by the ecu and it is all at a peak now
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      06-25-2014, 06:52 AM   #8
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Think I need to inspect mine. It feels slightly sluggish off throttle.

I may have to setup the laptop and try to plot actual boost vs expected to see if there is an appreciable gap in that rev range.
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      06-25-2014, 12:55 PM   #9
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Or if you suspect a leak, look for oil
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      06-25-2014, 01:26 PM   #10
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Si-335d, did you have a chance to snap those pictures?
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      06-26-2014, 02:06 PM   #11
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Not yet, the forge websites shows the pipe. on the car it looks pretty stock to be honest, main difference is that it ha forge written on it
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      06-27-2014, 10:04 AM   #12
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My red charge pipe looks a bit oil soaked too.

Couple questions. Where did you order the Forge hose from, seems like they don't have retailers here in the States. Approximately how much?

Also, from what I've read, you have to reuse the lower seal with the new Forge hose kit. So if the lower seal is one of the culprit for the leaks, how will reusing that seal improve the fit?

Thanks.
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      06-27-2014, 12:30 PM   #13
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I got it direct from forge on the website. It was under 100 including vat and delivery. I fitted a new bottom seal instead of using the old one. It comes with a double deal at the top from forge rather than the single one the oem pipe used
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