General boxer engine question... - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Packofcrows · 01-21-2016, 01:16 AM

Is it me or do boxer engines produce more steam through exhaust than twin and V engines during idle? Makes no difference if car is hot or cold.

Below is video courtesy of our beloved member @humfrz

Quote:

Originally Posted by humfrz

More white stuff than this (at air temp of about 50 degrers F)

humfrz

Captain Snooze · 01-21-2016, 01:27 AM

Variables that come to mind after 18.4 seconds of consideration.
Size of engine
Humidity of ambient air
Temperature of ambient air
Engine operating temperature between starts.
Integrity of head gasket

I am suggesting too many variables to answer your question.

humfrz · 01-21-2016, 01:40 AM

Quote:

Originally Posted by Packofcrows

Is it me or do boxer engines produce more steam through exhaust than twin and V engines during idle? ..........

hmmmmm........I wouldn't think there would be any significant difference than with any other gasoline, fuel injected, engine with similar displacement and smog control devices.

Maybe it just looks that way to us, because we like to watch and listen to the exhaust when the engine starts up .....

humfrz

Ultramaroon · 01-21-2016, 01:43 AM

Quote:

Originally Posted by humfrz

hmmmmm........I wouldn't think there would be any significant difference than with any other gasoline, fuel injected, engine with similar displacement and smog control devices.

Maybe it just looks that way to us, because we like to watch and listen to the exhaust when the engine starts up .....

humfrz

Roger that.

Captain Snooze · 01-21-2016, 01:46 AM

Quote:

Originally Posted by Ultramaroon

Roger that.

Peter that.

Ultramaroon · 01-21-2016, 01:48 AM

Quote:

Originally Posted by Captain Snooze

Peter out.

fify

Packofcrows · 01-21-2016, 01:57 AM

Washed my pickup, then friends 2.5 RS and noticed his exhaust (all stock car) had clouds blowing out of its exhaust when we turned it on, so he asked me to turn on my FRS to compare and same thing! I have TRD exhaust.

Then neighbor's boyfriend came over and he has a SI so we checked his exhaust out and noticed our cars (Subaru's) shoot out/burn out more steam. Got me curious.

Temps on cars read 55-57 for outside. I'm sure that was also a factor, but my truck didnt have huge clouds.

p.s. his car has 65k miles all stock that he bought from older couple two years ago. He pampers that sob more than his mom. His car has zero issues and does not burn coolant nor oil AFAWK.

Cole · 01-21-2016, 01:55 PM

I think the important thing here, is to note that resident old man, @humfrz made a ricer exhaust video like a young buck.

Bravo good sir.

justatroll · 01-21-2016, 02:08 PM

Horizontally opposed engines notoriously blow smoke at startup.

I have always assumed it was because oil pools on the side of the cylinder when the engine is not running.
This allows slightly more oil to pass the rings than a comparable straight or V configuration.

VWs and Porsches all do it to some extent.

If it is doing it long after startup then it is something else.

Jonathanlim · 01-21-2016, 02:14 PM

I have the same problem.(don't know if this is normal) I would start up at 50 degrees and steam would come out, and continue to. Sometimes I would see water underneath my exhaust tips.

Sent from my iPhone using Tapatalk

go_a_way1 · 01-21-2016, 02:17 PM

Quote:

Originally Posted by Jonathanlim

I have the same problem. I would start up at 50 degrees and steam would come out, and continue to. Sometimes I would see puddle of water underneath my exhaust tips.

Sent from my iPhone using Tapatalk

water means your cats are working good and you are having efficient combustion

Packofcrows · 01-21-2016, 03:01 PM

Quote:

Originally Posted by Cole

I think the important thing here, is to note that resident old man, @humfrz made a ricer exhaust video like a young buck.

Bravo good sir.

We gotta love @humfrz, he's a big child in an adult (o.g.) skin costume.

...wait that dont sound right.

Quote:

Originally Posted by Jonathanlim

I have the same problem.(don't know if this is normal) I would start up at 50 degrees and steam would come out, and continue to. Sometimes I would see water underneath my exhaust tips.

Sent from my iPhone using Tapatalk

@Jonathanlim,

Pumping gas from Chevron does that for me but not Arco or Shell. It probably has to do with mixes they put in there as well. My .02 cents are also on it being a Subaru thing. Will confirm later at work with a Legacy one of my co-workers drives.

LaertesSon · 01-21-2016, 04:14 PM

My guess is that they don't.. Id say a 4cyl 2.0 boxer makes about the same as any sort of inline 2.0 four. But hey who knows. I know my FR-S bellows a lot of steam on startup.
EDIT: for sure not a problem though. Looks like everyone is doing it

PandaSPUR · 01-21-2016, 06:46 PM

I wonder if its related to exhaust piping design? Our overpipe goes up a bit before coming back down to the midpipe right? Maybe all the water from cats and whatnot pool there after we shut off engine.

01-21-2016, 01:27 AM	#2
Captain Snooze Because compromise ® Join Date: Jan 2012 Drives: Red Herring Location: australia Posts: 7,823 Thanks: 4,053 Thanked 9,565 Times in 4,199 Posts Mentioned: 60 Post(s)	Variables that come to mind after 18.4 seconds of consideration. Size of engine Humidity of ambient air Temperature of ambient air Engine operating temperature between starts. Integrity of head gasket I am suggesting too many variables to answer your question. __________________ My car is completely stock except for all the mods.

01-21-2016, 01:57 AM	#7
Packofcrows hey you, yeah you <3 Join Date: Jul 2012 Drives: 2014 37J FR-S Location: Monterey County, CA Posts: 2,715 Thanks: 905 Thanked 1,259 Times in 809 Posts Mentioned: 38 Post(s)	Washed my pickup, then friends 2.5 RS and noticed his exhaust (all stock car) had clouds blowing out of its exhaust when we turned it on, so he asked me to turn on my FRS to compare and same thing! I have TRD exhaust. Then neighbor's boyfriend came over and he has a SI so we checked his exhaust out and noticed our cars (Subaru's) shoot out/burn out more steam. Got me curious. Temps on cars read 55-57 for outside. I'm sure that was also a factor, but my truck didnt have huge clouds. p.s. his car has 65k miles all stock that he bought from older couple two years ago. He pampers that sob more than his mom. His car has zero issues and does not burn coolant nor oil AFAWK. __________________ Got my TRD wheels and TRD louvers. Thanks!!!

01-21-2016, 02:14 PM	#10
Jonathanlim Member Join Date: Jan 2016 Drives: 15' Frs Location: ATLANTA GA Posts: 52 Thanks: 14 Thanked 5 Times in 5 Posts Mentioned: 1 Post(s)	General boxer engine question... I have the same problem.(don't know if this is normal) I would start up at 50 degrees and steam would come out, and continue to. Sometimes I would see water underneath my exhaust tips. Sent from my iPhone using Tapatalk

01-21-2016, 04:14 PM	#13
LaertesSon Member Join Date: Jan 2014 Drives: Asphalt 2013 FR-S 6MT Location: Atlanta, Georgia Posts: 50 Thanks: 36 Thanked 14 Times in 12 Posts Mentioned: 1 Post(s)	General boxer engine question... My guess is that they don't.. Id say a 4cyl 2.0 boxer makes about the same as any sort of inline 2.0 four. But hey who knows. I know my FR-S bellows a lot of steam on startup. EDIT: for sure not a problem though. Looks like everyone is doing it __________________ OFT Stage 2 tune, OFH, Works AB-M, Perrin 2.75" Intake/Silicone inlet Kartboy Short Shifter, WC Lathewerks knob, MTEC springs TSW Nurburgring, FIVE:AD aero kit, smoked Valenti

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
general question	Stewie	BRZ First-Gen (2012+) — General Topics	39	04-12-2015 08:57 PM
What happens on a Boxer engine when there's too much Oil?	@Art_Mighty	Engine, Exhaust, Transmission	29	06-15-2014 04:36 PM
Boxer engine and temps	SlinkyAvalanche	Engine, Exhaust, Transmission	9	03-27-2014 03:00 PM
Next Gen Boxer Engine 4U-GSE	WingsofWar	Engine, Exhaust, Transmission	33	12-10-2011 12:04 AM
Could this be the base FT-86 boxer engine?	iff2mastamatt	Engine, Exhaust, Transmission	2	02-10-2011 10:55 PM

01-21-2016, 01:55 PM	#8
Cole Not a troll Join Date: Apr 2015 Drives: FR-S Location: Canada Posts: 5,104 Thanks: 8,237 Thanked 5,399 Times in 2,694 Posts Mentioned: 266 Post(s)	I think the important thing here, is to note that resident old man, @humfrz made a ricer exhaust video like a young buck. Bravo good sir.

01-21-2016, 02:08 PM	#9
justatroll Senior Member Join Date: Dec 2015 Drives: Full race 4cyl boxer Location: CO, USA Posts: 587 Thanks: 310 Thanked 510 Times in 269 Posts Mentioned: 20 Post(s)	Horizontally opposed engines notoriously blow smoke at startup. I have always assumed it was because oil pools on the side of the cylinder when the engine is not running. This allows slightly more oil to pass the rings than a comparable straight or V configuration. VWs and Porsches all do it to some extent. If it is doing it long after startup then it is something else.

01-21-2016, 06:46 PM	#14
PandaSPUR PandaPandaPandaPandaPanda Join Date: May 2014 Drives: 2015 BRZ Limited CWP Location: New York City, NY Posts: 1,432 Thanks: 776 Thanked 697 Times in 438 Posts Mentioned: 12 Post(s)	I wonder if its related to exhaust piping design? Our overpipe goes up a bit before coming back down to the midpipe right? Maybe all the water from cats and whatnot pool there after we shut off engine.

User Name		Remember Me?
Password