RPI exhaust

strokeoluck · 07-21-2013, 08:03 PM

See pic attached. Why is only one of the two exhaust pipes black? If exhaust is exiting both pipes (on each side of the car; 4 pipes total...only two of which are black), why would only one turn black?

dubsesd · 07-21-2013, 08:06 PM

One has more flow. The other exits off the main. Just clean ur tips regularly. I have never seen tips that dirty lol

Z4MHawk · 07-21-2013, 09:21 PM

Very little exhaust travels into the smaller diameter pipe, even though there is a side port with a screen. I removed the screen and nothing really changed in terms of of the amount of exhaust soot/carbon buildup. Just keep it clean with soapy water.

strokeoluck · 07-21-2013, 10:05 PM

Quote:

Originally Posted by dubsesd

One has more flow. The other exits off the main. Just clean ur tips regularly. I have never seen tips that dirty lol

Thanks guys. I really should keep them cleaner. The rest of the car is immaculate, but after a while I started thinking the black exhaust looked a little bad *ss. ;-)

Nate4641 · 07-21-2013, 10:08 PM

What they said, more flow out of one side. If you're DDing the car you'll see a lot more build up too. Try adding some of that Armor All Wheel Protectant Spray to them after cleaning them and it should reduce how much carbon builds up and should make the next cleanings easier too.

strokeoluck · 07-22-2013, 08:20 AM

Quote:

Originally Posted by Nate4641

Try adding some of that Armor All Wheel Protectant Spray to them after cleaning them and it should reduce how much carbon builds up and should make the next cleanings easier too.

Good tip, thank you!

zubydafa · 07-23-2013, 06:20 AM

lol wait, you've never seen tips that dirty?

my rpi's have only 3k miles on them and look much much much worse.

my car sees the track at least 2 weekends a month, though.

zubydafa · 07-23-2013, 06:30 AM

as much as I take pics of my car, it's funny I can't find one of the rear in my ipwn album! here's the closest I found...as you can see, even my outers have build up in them. The inners....eh lost cause lol.

07-21-2013, 08:03 PM	#1
strokeoluck First Lieutenant 23 Rep 325 Posts Drives: 2007 BMW Z4 M roadster Join Date: Sep 2012 Location: Minnesota iTrader: (0)	RPI exhaust - one side black? See pic attached. Why is only one of the two exhaust pipes black? If exhaust is exiting both pipes (on each side of the car; 4 pipes total...only two of which are black), why would only one turn black? Attached Images
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07-21-2013, 08:06 PM	#2
dubsesd #dubspec 6336 Rep 5,201 Posts Drives: G05 X5/ 2016 F80 M3 INDVL Join Date: Jul 2011 Location: Ottawa iTrader: (2)	One has more flow. The other exits off the main. Just clean ur tips regularly. I have never seen tips that dirty lol __________________ LCI ///F80 M3 Individual Atlantis Metallic / Black Full / Carbon Cermics / 6MT MPE / M Performance & Carbon package / KW v3 / 20" HRE R101LW / 20" HRE 527s / Michelin PSS / 20% tint / 3d Design / Streckenn splitters / OEM GTS hood / EAS Carbon seatbacks / Carbon RKP sideskirt / Bootmod3 / M Performance Tri color alcantara / AWE S Flow instagram: @ dubsesd
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07-21-2013, 09:21 PM	#3
Z4MHawk Private First Class 3 Rep 165 Posts Drives: '06 Z4 M Roadster Join Date: Feb 2009 Location: tulsa iTrader: (0)	Very little exhaust travels into the smaller diameter pipe, even though there is a side port with a screen. I removed the screen and nothing really changed in terms of of the amount of exhaust soot/carbon buildup. Just keep it clean with soapy water. __________________ '06 Z4 ///M Roadster: Silver Gray Metallic; Gray soft top. Zeckhausen CDV. ESS VT1 445 Supercharger. APEX ARC8's. Dunlap Direzza Star Spec's. Strong Struts. Royal Purple. RPI Exhaust w/ DKF hangers.
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07-21-2013, 10:08 PM	#5
Nate4641 Major 151 Rep 1,134 Posts Drives: '07 M Roadster Join Date: Dec 2011 Location: Warner Robins, GA iTrader: (0) Garage List 2007 BMW Z4 M Roadster [0.00]	What they said, more flow out of one side. If you're DDing the car you'll see a lot more build up too. Try adding some of that Armor All Wheel Protectant Spray to them after cleaning them and it should reduce how much carbon builds up and should make the next cleanings easier too. __________________ My build/adventure thread
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07-23-2013, 06:20 AM	#7
zubydafa tosser 31 Rep 988 Posts Drives: '07 Z4MC Join Date: Jul 2011 Location: Allentown, PA iTrader: (0)	lol wait, you've never seen tips that dirty? my rpi's have only 3k miles on them and look much much much worse. my car sees the track at least 2 weekends a month, though.
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07-23-2013, 06:30 AM	#8
zubydafa tosser 31 Rep 988 Posts Drives: '07 Z4MC Join Date: Jul 2011 Location: Allentown, PA iTrader: (0)	as much as I take pics of my car, it's funny I can't find one of the rear in my ipwn album! here's the closest I found...as you can see, even my outers have build up in them. The inners....eh lost cause lol.
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