fluid motor union z4m exhaust!! wonderful!

Beedub · 02-25-2013, 03:58 PM

absolutely wonderful workmanship!!!!

http://www.stanceworks.com/forums/sh...ad.php?t=20357

inTgr8r · 02-25-2013, 05:24 PM

Yes ... Nice welding, but I don't see how it can be a very effective system with all those welds.
I'm not a fan of these cut & paste coupled systems.

Jroc · 02-25-2013, 05:48 PM

Beautiful

RobMCoupe · 02-25-2013, 09:06 PM

Quote:

Originally Posted by inTgr8r

Yes ... Nice welding, but I don't see how it can be a very effective system with all those welds.
I'm not a fan of these cut & paste coupled systems.

+1

The welds can cause turbulence which effects exhaust flow.

elwesso · 02-26-2013, 05:58 AM

Good workmanship for sure, but that seems like leak city once the car is a few years old.. The ideal situation would be to have one solid piece of tube bent where it needs to be....

From an engineering standpoint, the relative roughness of a pipe can have a large affect on the friction within the pipe.. In many cases, a even a crush bend might be better than having weld penetrate into the flow. I'd have to bust out my fluid mechanics book to verify..

On the other hand, it might not be as bad if they expanded the joints of the pipes so they fit together and you were just welding that outside seam, rather than butt-welding together. My guess is that could be how they did it, seems like it would be dang near impossible to get it together properly if all those little tiny pieces were butt-welded together.

inTgr8r · 02-26-2013, 07:14 AM

The other significant thing is;
The way this is routed it looks like the chassis structural reinforcement plate is unlikely to fit.

yousefnjr · 02-26-2013, 01:21 PM

Quote:

Originally Posted by elwesso

... were just welding that outside seam, rather than butt-welding together..

Butt-weld made me lol

02-25-2013, 03:58 PM	#1
Beedub Major General 423 Rep 5,328 Posts Drives: 2007 Z4 M roadster vt2-500 Join Date: Sep 2007 Location: UK iTrader: (0)	fluid motor union z4m exhaust!! wonderful! absolutely wonderful workmanship!!!! http://www.stanceworks.com/forums/sh...ad.php?t=20357 __________________ Z4MR VT2 - Clubsport build. Multi award winning Detailing \| Wrap \| PPF specialists UK based - www.topwrapz.com
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02-25-2013, 05:24 PM	#2
inTgr8r Lieutenant General 2432 Rep 11,667 Posts Drives: M2 Comp Join Date: Mar 2006 Location: Toronto iTrader: (10)	Yes ... Nice welding, but I don't see how it can be a very effective system with all those welds. I'm not a fan of these cut & paste coupled systems. __________________ '21 M2C Hockenheim Silver '18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold)
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02-25-2013, 05:48 PM	#3
Jroc Lieutenant 13 Rep 415 Posts Drives: Mcoupe Join Date: Sep 2011 Location: United States iTrader: (0)	Beautiful
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02-26-2013, 05:58 AM	#5
elwesso Second Lieutenant 25 Rep 299 Posts Drives: Z4 M Coupe Join Date: Dec 2012 Location: Indiana iTrader: (1)	Good workmanship for sure, but that seems like leak city once the car is a few years old.. The ideal situation would be to have one solid piece of tube bent where it needs to be.... From an engineering standpoint, the relative roughness of a pipe can have a large affect on the friction within the pipe.. In many cases, a even a crush bend might be better than having weld penetrate into the flow. I'd have to bust out my fluid mechanics book to verify.. On the other hand, it might not be as bad if they expanded the joints of the pipes so they fit together and you were just welding that outside seam, rather than butt-welding together. My guess is that could be how they did it, seems like it would be dang near impossible to get it together properly if all those little tiny pieces were butt-welded together. __________________ - Wes 2007 BMW M Coupe 2016 VW GTI
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02-26-2013, 07:14 AM	#6
inTgr8r Lieutenant General 2432 Rep 11,667 Posts Drives: M2 Comp Join Date: Mar 2006 Location: Toronto iTrader: (10)	The other significant thing is; The way this is routed it looks like the chassis structural reinforcement plate is unlikely to fit. __________________ '21 M2C Hockenheim Silver '18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold)
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