Smoke coming from only 1 exit on dual exhaust? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

illest · 01-04-2016, 10:41 AM

Hey guys, so recently I noticed that smoke is coming from only the passenger side exit of the exhaust but not the driver side. I have a Invidia Catless Front Pipe+Greddy Evo3 Catback...The airflow seems to be a little stronger on the passenger side but the driver side literally emits zero smoke...what could be the issue here?

go_a_way1 · 01-04-2016, 10:43 AM

Quote:

Originally Posted by illest

Hey guys, so recently I noticed that smoke is coming from only the passenger side exit of the exhaust but not the driver side. I have a Invidia Catless Front Pipe+Greddy Evo3 Catback...The airflow seems to be a little stronger on the passenger side but the driver side literally emits zero smoke...what could be the issue here?

I would guess a poor pipe layout, but does it really matter... no lol so don't worry about it.

illest · 01-04-2016, 10:51 AM

Quote:

Originally Posted by go_a_way1

I would guess a poor pipe layout, but does it really matter... no lol so don't worry about it.

lol okok, just making sure there isn't some deeper issue here, thanks!

HunterGreene · 01-04-2016, 10:52 AM

If the OP has smoke coming out of his exhaust, that might be more a cause than gas exit bias.

However, which side it comes out of more is going to depend more on the angles that the pipes are welded in. Since the exhaust is going to follow the path of least resistance, unless the piping is welded in a perfect "Y" you are going to see more exhaust come out one side than the other. Keep in mind that the dual exhaust in this car is functional, but mostly cosmetic. We only really need a single exhaust, but people generally prefer the look of a dual.

Gear_One_Performance · 01-04-2016, 11:53 AM

Perfectly normal, most every split exhaust I've installed tends to favor a side.

Cole · 01-04-2016, 12:44 PM

Quote:

Originally Posted by HunterGreene

If the OP has smoke coming out of his exhaust, that might be more a cause than gas exit bias.

However, which side it comes out of more is going to depend more on the angles that the pipes are welded in. Since the exhaust is going to follow the path of least resistance, unless the piping is welded in a perfect "Y" you are going to see more exhaust come out one side than the other. Keep in mind that the dual exhaust in this car is functional, but mostly cosmetic. We only really need a single exhaust, but people generally prefer the look of a dual.

I love single exits. Everyone else is weird.

But again, just to reiterate, very normal. Just looks odd.

jawn · 01-04-2016, 12:46 PM

Doesn't it mean we have a new pope?

humfrz · 01-04-2016, 01:35 PM

I suggest you place a rag over the exhaust pipe that most of the exhaust is coming out and see if the exhaust will go out the other side.

Maybe someone jammed a potato up the driver’s side..... ?? …..have you been messing around with someone else’s wife lately …. ??

humfrz

Gunman · 01-04-2016, 07:39 PM

OEM exhaust favors the RH (passenger) side too. You can really tell in cold weather.

illest · 01-04-2016, 08:01 PM

sounds like the general consensus is that it is not a big deal.

so I tried blocking the side where smoke was coming out from and smoke started to come out on the other side. Once I unblock it, it just goes back to the way it was (passenger side with smoke and driver side with what seems to me just air)

01-04-2016, 10:41 AM	#1
illest Member Join Date: Apr 2013 Drives: Scion FR-S Location: Richmond Hill Posts: 28 Thanks: 5 Thanked 5 Times in 5 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Smoke coming from only 1 exit on dual exhaust? Hey guys, so recently I noticed that smoke is coming from only the passenger side exit of the exhaust but not the driver side. I have a Invidia Catless Front Pipe+Greddy Evo3 Catback...The airflow seems to be a little stronger on the passenger side but the driver side literally emits zero smoke...what could be the issue here?

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01-04-2016, 11:53 AM	#5
Gear_One_Performance Senior Member Join Date: Mar 2015 Drives: 2014 BRZ SCCA STU endurance car Location: West Chester, Pennsylvania Posts: 199 Thanks: 2 Thanked 142 Times in 82 Posts Mentioned: 1 Post(s) Tagged: 1 Thread(s)	Perfectly normal, most every split exhaust I've installed tends to favor a side.

01-04-2016, 12:46 PM	#7
jawn Senior Member Join Date: Jun 2015 Drives: 2015 CWP BRZ Limited Location: NOVA Posts: 2,800 Thanks: 1,801 Thanked 3,946 Times in 1,757 Posts Mentioned: 105 Post(s) Tagged: 7 Thread(s)	Doesn't it mean we have a new pope?

01-04-2016, 01:35 PM	#8
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 30,432 Thanks: 29,826 Thanked 32,845 Times in 16,844 Posts Mentioned: 715 Post(s) Tagged: 2 Thread(s)	I suggest you place a rag over the exhaust pipe that most of the exhaust is coming out and see if the exhaust will go out the other side. Maybe someone jammed a potato up the driver’s side..... ?? …..have you been messing around with someone else’s wife lately …. ?? humfrz

01-04-2016, 08:01 PM	#10
illest Member Join Date: Apr 2013 Drives: Scion FR-S Location: Richmond Hill Posts: 28 Thanks: 5 Thanked 5 Times in 5 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	sounds like the general consensus is that it is not a big deal. so I tried blocking the side where smoke was coming out from and smoke started to come out on the other side. Once I unblock it, it just goes back to the way it was (passenger side with smoke and driver side with what seems to me just air)

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