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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > 3 inch downpipe fitment



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      10-14-2015, 09:04 AM   #1
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3 inch downpipe fitment

Okay guys I bought a set a of Macht Schnell ceramic coated off a forum member here. There is absolutely no way for them to fit perfectly. The short pipe either hits sub frame or has to be moved and touches the other pipe at the catback. I've read the treads and spent a ridiculous amount of time trying to find the sweet spot, impossible. I have great visual and physical access ,I've tired to tweak everything. My last resort is "massage " with a hammer as another member suggested. This worries me, i dont want to damage the coating or cause a horrible sound due to a dent. I was thinking about using a rubber mallet to flatten out the place it hits the subframe. Can any one give me any tips on doing this or even if I should do this ? Thanks to all who reply

-David
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      10-14-2015, 12:22 PM   #2
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Quote:
Originally Posted by dapz325 View Post
Okay guys I bought a set a of Macht Schnell ceramic coated off a forum member here. There is absolutely no way for them to fit perfectly. The short pipe either hits sub frame or has to be moved and touches the other pipe at the catback. I've read the treads and spent a ridiculous amount of time trying to find the sweet spot, impossible. I have great visual and physical access ,I've tired to tweak everything. My last resort is "massage " with a hammer as another member suggested. This worries me, i dont want to damage the coating or cause a horrible sound due to a dent. I was thinking about using a rubber mallet to flatten out the place it hits the subframe. Can any one give me any tips on doing this or even if I should do this ? Thanks to all who reply

-David
Have you already tried adjusting the mid section of the exhaust to allow for more clearance?
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      10-14-2015, 12:42 PM   #3
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Originally Posted by Jeff@TopGearSolutions View Post
Have you already tried adjusting the mid section of the exhaust to allow for more clearance?
I wedged a screwdriver in between the exhaust to space it,then tighten the exhaust bracket. Is there a better way to do this ?
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      10-14-2015, 12:45 PM   #4
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Quote:
Originally Posted by dapz325 View Post
Okay guys I bought a set a of Macht Schnell ceramic coated off a forum member here. There is absolutely no way for them to fit perfectly. The short pipe either hits sub frame or has to be moved and touches the other pipe at the catback. I've read the treads and spent a ridiculous amount of time trying to find the sweet spot, impossible. I have great visual and physical access ,I've tired to tweak everything. My last resort is "massage " with a hammer as another member suggested. This worries me, i dont want to damage the coating or cause a horrible sound due to a dent. I was thinking about using a rubber mallet to flatten out the place it hits the subframe. Can any one give me any tips on doing this or even if I should do this ? Thanks to all who reply

-David
You're not XI are you?

Watch this video and see if provides any hints. Sometimes you just need to work at it. I am not familiar with the fitment of the Macht Schnell pipes but if they are ceramic coated any "hammer" contact will destroy the coating.

Did they fit on the other guys car? Did he have any issues?

Were there any obvious marks on the pipes to suggest they were hitting the subframe on his car as well?

Mike
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      10-14-2015, 12:45 PM   #5
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Quote:
Originally Posted by dapz325 View Post
I wedged a screwdriver in between the exhaust to space it,then tighten the exhaust bracket. Is there a better way to do this ?
That's more or less the concept but yea the goal is to loosen the mid pipe support bracket and push the pipes over to allow for more clearance.

Not sure what else you can do after that.

If you clock the downpipes perfectly there should be enough room but my experience with macht schnel is null.

I've installed a few VRSF DP's though.
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      10-14-2015, 01:10 PM   #6
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Quote:
Originally Posted by Mike@N54Tuning.com View Post
You're not XI are you?

Watch this video and see if provides any hints. Sometimes you just need to work at it. I am not familiar with the fitment of the Macht Schnell pipes but if they are ceramic coated any "hammer" contact will destroy the coating.

Did they fit on the other guys car? Did he have any issues?

Were there any obvious marks on the pipes to suggest they were hitting the subframe on his car as well?

Mike
No im not xi. I can't see the link but if it's the AR video I've seen it so much that I can quote it and "I'm gonna drive till it burns my bones " is engraved into my head. Yeah the guy I got them from said there was no problems and there wasn't obvious scratches on the ceramic.
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      10-14-2015, 01:13 PM   #7
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I used this guide to help me out with my downpipe install, which took me and a buddy a good 6 hours. The fitment has to be so perfect and the limited space makes it a mess.

http://www.billswebspace.com/335Riss...wnpipesDIY.htm
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      10-14-2015, 01:25 PM   #8
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Quote:
Originally Posted by Jeff@TopGearSolutions View Post
That's more or less the concept but yea the goal is to loosen the mid pipe support bracket and push the pipes over to allow for more clearance.

Not sure what else you can do after that.

If you clock the downpipes perfectly there should be enough room but my experience with macht schnel is null.

I've installed a few VRSF DP's though.
Im at a loss of what to do . Playing this game does rub or rattle is not fun. The pipes themselves look great and would be perfect if i could could get them on right . Thanks for your reply , you and Mike have helped tons of member and we appreciate it, you rock.
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      10-14-2015, 01:35 PM   #9
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Quote:
Originally Posted by Zoog View Post
I used this guide to help me out with my downpipe install, which took me and a buddy a good 6 hours. The fitment has to be so perfect and the limited space makes it a mess.

http://www.billswebspace.com/335Riss...wnpipesDIY.htm
Thanks, i just checked it out and they swapped out the torx bolt for a hex. That might let me move the long pipe over some. I'll get under there and see if it's worth the swap
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      10-14-2015, 02:26 PM   #10
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Sorry about that. Have you tried contacting the manufacturer and see if they can give you any install tips?
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      10-14-2015, 04:22 PM   #11
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Quote:
Originally Posted by dapz325 View Post
Im at a loss of what to do . Playing this game does rub or rattle is not fun. The pipes themselves look great and would be perfect if i could could get them on right .

Thanks for your reply , you and Mike have helped tons of member and we appreciate it, you rock.
Always happy to help where I can Keep us updated on the outcome.

Mike
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      10-14-2015, 04:26 PM   #12
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Which exhaust bracket are you tightening? The support on the midpipe itself? I don't think that one will hold an adjustment.

Mine touched at the exhaust connection as well, basically both flanges touched. I had to loosen V-band, clock the long pipe, and pry the flanges apart then tighten the V-band. That gave me about 2mm of clearance between the flanges.
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      10-14-2015, 04:45 PM   #13
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Thanks for the advice guys. I will take it apart for the forth time later tonight. Anybody know the minimum distance everything has to be not to rub under any conditions? Ill find something to mark it off and make sure I have clearance before everything is bolted up.
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      10-14-2015, 05:23 PM   #14
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You need at least a few MM of space between the components.
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      10-14-2015, 09:38 PM   #15
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Quote:
Originally Posted by dapz325 View Post
Thanks for the advice guys. I will take it apart for the forth time later tonight. Anybody know the minimum distance everything has to be not to rub under any conditions? Ill find something to mark it off and make sure I have clearance before everything is bolted up.
We recommend 1/4"

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      10-15-2015, 01:04 AM   #16
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I have Macht Schnell DP's. Love them. They fit like a glove on my E90. When tightening them place a screw driver between the two DP's so that they don't move closer to each other and rattle when you start driving.
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      10-15-2015, 01:33 AM   #17
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Okay this isn't gonna work, what do yal think about adding some heat wrap around where the downpipes meet the catback. It would stop the clanking when going over bumps but might cause a vibration if they are touching
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      10-15-2015, 01:37 AM   #18
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Quote:
Originally Posted by PR3CI5N View Post
I have Macht Schnell DP's. Love them. They fit like a glove on my E90. When tightening them place a screw driver between the two DP's so that they don't move closer to each other and rattle when you start driving.
Whenever I do this the the face of the downpipes doesn't sit flush with the turbo and slowly adds more pressure when tightening the v bands . When I remove the screw driver the pressure bring them back together
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      10-15-2015, 01:54 AM   #19
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Quote:
Originally Posted by dapz325
Quote:
Originally Posted by PR3CI5N View Post
I have Macht Schnell DP's. Love them. They fit like a glove on my E90. When tightening them place a screw driver between the two DP's so that they don't move closer to each other and rattle when you start driving.
Whenever I do this the the face of the downpipes doesn't sit flush with the turbo and slowly adds more pressure when tightening the v bands . When I remove the screw driver the pressure bring them back together
Compare your MS DP's to the your stock DP's and make sure they aren't warped.
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      10-15-2015, 02:55 AM   #20
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That won't be any use because I got them of a member.

The short pipe is just to tight. No way I'm getting 1/4" even with the heat shield removed. If i try to center it more it touches on the other side. If the wrap or some other idea is out I'll have to sadly beat it with a hammer
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      10-15-2015, 08:43 AM   #21
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Quote:
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That won't be any use because I got them of a member.

The short pipe is just to tight. No way I'm getting 1/4" even with the heat shield removed. If i try to center it more it touches on the other side. If the wrap or some other idea is out I'll have to sadly beat it with a hammer
Maybe you got a bad set then? But did they fit on the person's car you got them from?

Mike
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      10-15-2015, 10:40 AM   #22
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We've removed a set of race land down pipes that literally melted a half circle into the customers subframe because they were installed against the subframe to prevent rattling.

If they were used there's a good chance they didn't fit then either.
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