If anyone is interested in the full warm up - no time lapse, no voiceover, no music; just pure data shoved at your brain for a continuous 15 minutes, I’m here for you! Here’s the link: th-cam.com/video/W6_lv2UNQAg/w-d-xo.html EMISSIVITY NOTE: For anyone concerned about emissivity and the temperatures you're witnessing, I just did a quick test in my kitchen to verify the temps we're seeing. I took a sheet of paper (emissivity ~0.9+) and a sheet of aluminum foil (emissivity ~0.05), while the camera was set for an emissivity of 0.95. The camera accurately read the temperature of both items (about 20 deg C). Then I switched the camera's emissivity to 0.04. The aluminum foil's temp then varied widely, from 0 deg C to 50 deg C (it was still at 20 deg C, the temperature inside my home), while the sheet of paper now incorrectly read 30 deg C. To me, this shows that with the camera set at 0.95 for emissivity, readings will be accurate, and it has a way of calibrating for various emissivity coefficients of what's in view. This video was recorded with emissivity set at 0.95.
Engineering Explained Why do you recommend not letting the car/engine warm up before driving? I was under the impression that it is preferred to warm the engine before driving because the engine fluids are at operating temperatures. Warm/hot oil ect. will provide better protection against engine wear?
blubyu there are various reasons why it is best to drive your vehicle, albeit in a tame fashion, 30-60 seconds after you start it. as far as the fluids go, and in particular engine oil, they are designed to work ok at low temperatures. believe it or not your cylinder walls are not perfectly round. they are oblong because the block is not equally thick in all directions and therefore expands with heat by different amounts in different directions. The engine is designed to work BEST at operating temperature and acceptable on cold starts. The longer your engine runs while its cold and the piston rings and cylinder walls haven't fully expanded, the more exhaust gas blows by the rings and mixes with the engine oil. The fastest way to heat your engine is to drive it because more fuel is burned and thus more heat is made. As EE showed even after 15 minutes the transmissions has not received all that heat from the engine and is still many degrees away from operating temperature. The piston "blow by" when running cold is one reason "short trips" and "stop and go" are considered "severe" operating conditions which require shorter oil drain intervals. Both cause more mixing of exhaust gases with the oil which in turn changes the oil unfavorably.
If you're the type to hop in and stomp the gas, it's pretty helpful to know that even after warming up, the transmission is still pretty much ice cold.
This^ also if you drive manual you can feel the tranny oil getting thinner and easy to change gears. The transmission seems to warm up quicker than the engine on my car.
I read somewhere that you can with this camera, but it will record at a lower resolution. I think 120/240 fps was possible, but I also believe there is additional hardware needed to make it happen.
Engineering Explained well imagine filming like friction welding or something with our Phantom Flex 4K, or the Phantom v2512 , would be cool if there was some type of thermal filter to put in between the camera and the subject.
You can do slow motion thermal. The FLIR X6900sc does 640x512 at 1000 frames per second. It costs about as much as your Flex4K, if not more. Oh, and each lens is around $3-5k.
Nice job. A huge car nut here. I am constantly amazed at how much of a compromise internal combustion engines are. In this video, I see all that fuel being converted to heat!
This is nice. Makes me think about the expansion and the compression of the metal as the engine runs trough its heat cycles troughout its life, and the heat and how it dissipates to all the plastic components around them.
love your videos, I'm at my 2nd year at my first engineering job in the automotive world and I absolutely love doing analysis projects like this! keep up the great videos!
A geek fact about emissivity: if the hot plate of your clothes iron is metallic and shiny smooth, it will not show at all on a thermal camera (the emissivity is 0). Even if you set the iron for 200C, all the camera will see is a 'mirror' reflecting the much cooler thermal sources from around the room. Also, hot (normal) air doesn't show up (e.g. from a heater element); the atoms/molecules are far too small for absorption or emission of 'thermal' wavelengths.
We use similar equipement at work for our Hi-Power test on jet engines but nothing that come close to it as far as the resolution, its pretty amazing!!!
I think this is an excellent example of bore and stroke on thermodynamic efficiency. The Subaru has a square bore to stroke ratio, whereas the S2000 is slightly oversquare meaning the bore is larger than the stroke. I'm actually surprised the F20C motor isn't more oversquare considering it's high rev limit. Anyway, the increased surface area of the oversquare motor means greater heat transfer in the combustion cylinder to the walls of the cylinder, partially contributing to the S2000's motor warming up too. Another funny thing is EE has a preference for cars with motors that have codes "F20", with the Subaru having the FA20 and the S2000 having the F20C motor.
your jokes cracked me up xD Good stuff man..been following you for a while. With the content you make (all your videos) plus some researching, someone could make a decently fast and reliable vehicle.
airflow while driving with closed hood (bonnet) is waay different. and some manufacturers actually take that in account while designing (like bmw). maybe with the hood closed and driving at least 30mph s2000 can have lower temps than subaru. i am not saying that is a fact, just a scenario that would be interesting to test and compare with these results. and small edit... transmission is stationary now. while driving friction could warm it up faster?
very interesting. That explains what is going on with our outback. good point on the transmission. I'm a racer and I wonder now if different cars have an advantage in how they cool the internals. well done.
I do not mean to impose, but here's a suggestion: configure a set scale for the temperature color. It seems that every video online suffers from this, and no one seems to think about it. It is very weird to the eye when a belt warms up to the exhaust temperatures almost immediately. And as part warm up further, it appears as if they were cooling down instead. A set scale would allow to observe the actual rate and differences in temperature. Particularly in case of comparison videos. As always, thank you for your work!
I had the same thought, until I tried it, which might be why so many of these videos use a sliding scale. Unfortunately, when you use a set scale, the image quality seems to be pretty poor because the camera doesn't differentiate temperatures well, so all you see is a dark, undefined mess. Only when temperatures start to get close to the high of your scale, does it start to show clearly. Using a sliding scale allows you to observe all of the components without all the colors running together, so you get a much sharper image.
I guess battery leads on the S2000 is one of those things that would be lost in a set scale. The hot spot on the rocker cover would also be lost. That's a shame. There's nearly a 50% difference in the middle of the video. I guess it would be great if the sale would equal at a given moment. Perhaps Flir should have the ability to adjust the scale in post (wishful thinking, I know).
Hi Jason, great experiment again! However, I find it would be clearer to use a fixed manual temperature scaling to see the evolution of the engine warming up. Granted the contrast is better with automatic scaling but then we cannot directly compare the two engines.
See if you can borrow one of the cryo cooled (operational temperature of the detector is about 80 Kelvin - brr) HD units like the X8000SC or something. Those buggers are insane. With a CO2 filter you could watch your car breathe. Granted - the price will need another 0 or two at the end of it, hehe. Being knee deep in these things all day I get a bit blind to the fact that, at the end of the day, they cost roughly an arm and a couple of legs. =P
Tony McModeNut So, can you tell what makes thermal cameras so expensive? Is it the material used for the lense, which I haven't seen used elsewhere, or is it something else? Like smaller number of units over which the design costs are spread, compared to consumer products?
From what I've learned of the unit, it comes down to the image sensor. Thermal sensor pixels are about 10x as large as traditional digital camera sensors, so the sensors are extraordinarily expensive.
All of the above, really. The lenses (made from germanium) are a big cost. Certainly when you have units with insane lenses like 1000mm continous zoom that can detect a human at up to 20-30 kilometers. As is the detector (sensor) - especially in the cryo cooled units. The precision work that goes into those coolers is amazing. And, like you said, the market (in terms of volume) is way smaller than normal cameras. I probably need to be a bit careful about specifics, hehe, but the camera used in this video, for example, is assembled and tested from start to finish by about ten or so people. Very nice people, at that. =)
Inagine if it was possible to gauge all your 5 points with the hood closed. But it seems you need to have the hood opened to aim and to assign your 5 points. Love your channel. Thanks
Here's the scientific side of engineering. As an R & D engineer, I've performed similar heat transfer studies several times, but with thermocouples and thermistors, not thermal cameras. R & D means researching with tests and data analysis *before* developing a machine, instrument or process. The research is the science, development is the art; engineering ties them together. This is a very interesting video!
Cool video. Would be super interesting, and probably difficult, to get the same data in an extreme driving scenario like a track day. Great content keep it up.
Not sure, I may have influenced it somehow standing next to it while setting everything up. Once the Subaru starts, the intake temperature drops to expected temps.
+Engineering Explained Did you adjust for the thermal emissivity of each material? If you did, maybe you were just a little off with the plastic, I could see the plastic used for an intake not being exactly "off the shelf".
It would be fun to see the same data points while the vehicles were moving at preset route... Just to see what the difference would be... No thermal camera would be acceptable ...
very lumpy, as evidenced by any car running the TODA VTEC-Killer camshafts, which basically replicate the VTEC cam profile on the regular cam lobes, and remove the middle VTEC cam lobe. All the VTEC components are removed, also.
Engineering Explained Thicker oils creatw more heat when cold because of friction of the engine parts with the oil itself, but i think the Honda warmed up faster because of the more compact engine layout.
No.... nowadays you don't have to change the oil in the summer and winter, if your car specifies 5W.30 you should use that in the winter and summer, my car specifies 20w50 so i use that all year.
You should perform this test on a older carbureted engine. Also would be cool to compare a liquid cooled sport bike motorcycle to an air-cooled V-Twin.
Appreciate Your effort , great video , good quantity data ! It would appear that when an engine is not working to hard , in this case idling ,the oil temperature will almost certainly not exceed the coolant temperature. So exessive [idling] will not really raise the oil temperature to 100degC where an oil is able to work probably and importantly water /moisture can evaporate off. 5 minutes looks sufficient for those owners who appreciate warming their engines .Graeme
in regards to intake temp readings isnt the subaru intake temp sensor built into the air flow meter? so it will be in the intake pipe close to the air box away from the hot engine. the honda would most likely be fitted in the manifold closer to the engine giving a higher reading.
Would be interesting to see this test again in summer, to see how quickly the cars get up to temp. I'm always wondered how close operating temperature the oil would be in my car on a 40C day within a few minutes of normal driving.
You need to be more careful, that engine is equipped with VTEC yo. When the VTEC kicks in yo the engine produces so much power it could cause a sonic boom from the dankness and kill anything within a 4 mile radius.
Thanks to my doors auto locking when the car is started, I've done a near 1 hour test of letting the car warm up with no throttle. My 1988 Buick Reatta with a 3800 V6's coolant reached 90C in a tad less than 10 minutes in about 10C ambient temp.
That's interesting to think about! Higher compression ratios mean higher thermal efficiency, meaning more energy is turned into useful work rather than heat.
Yes, but it also makes more heat overall, due to higher extraction of energy, and since there is less heat going out the exhaust, more heat ends up in both doing mech. work AND in the coolant system. "We" see that very often on relatively high compression (E85 fuel) turbo engines. running a MAP of 300 kPa (2 bar boost) on say 9.3:1 CR, vs a normal E5-E10 gas engine doing the same boost but with a lower CR of say 8:1
Why did you measure the oil temperature with a seperate device instead of the ODB2 scan tool listed in the video description? Is the oil temperature data not available through the ODB2 scan tool?
Really awesome and interesting video, I actually have been wondering this very thing ever since you talked about how long should you idle before taking off because I've been having some idling issues with my 9-3 Aero. Mine actually doesn't go below 1800 RPM no matter how warm it gets. Is that a function of the Turbo or not normal? Crazy how if you wait long enough on the internet your niche need is met. Still winter has had to have been hard on you.
To calculate the temperatures at various points through the thermal camera you must have kept in mind about the thermal emissivity of materials which is to be set in the thermal camera. So what emissivity you kept?
Most new cars with very efficient engines have electrical "auxiliary" heaters built in as standard (e.g. VW Passat, VW Golf), in order to warm the coolant up quicker, to get the emissions down as soon as possible and to comfort the driver and the passengers. Is this the case for both the Honda and the Subaru? This would have a great impact on the time that the coolant needs to warm up.
Thanks for the video. Is there a chance you do this on a Hybrid that has an EGHR to show how quicker these engines warm up and stay warm? I'd be very curious to see how it works.
If anyone is interested in the full warm up - no time lapse, no voiceover, no music; just pure data shoved at your brain for a continuous 15 minutes, I’m here for you! Here’s the link: th-cam.com/video/W6_lv2UNQAg/w-d-xo.html
EMISSIVITY NOTE: For anyone concerned about emissivity and the temperatures you're witnessing, I just did a quick test in my kitchen to verify the temps we're seeing. I took a sheet of paper (emissivity ~0.9+) and a sheet of aluminum foil (emissivity ~0.05), while the camera was set for an emissivity of 0.95. The camera accurately read the temperature of both items (about 20 deg C). Then I switched the camera's emissivity to 0.04. The aluminum foil's temp then varied widely, from 0 deg C to 50 deg C (it was still at 20 deg C, the temperature inside my home), while the sheet of paper now incorrectly read 30 deg C. To me, this shows that with the camera set at 0.95 for emissivity, readings will be accurate, and it has a way of calibrating for various emissivity coefficients of what's in view. This video was recorded with emissivity set at 0.95.
Engineering Explained why were you licking your arm....
@engineer explained what about electric engines?
Bruh, just Google it. In the time it took you to write your comment, you could've searched "emissivity" and answered your own question.
Engineering Explained Why do you recommend not letting the car/engine warm up before driving? I was under the impression that it is preferred to warm the engine before driving because the engine fluids are at operating temperatures. Warm/hot oil ect. will provide better protection against engine wear?
blubyu there are various reasons why it is best to drive your vehicle, albeit in a tame fashion, 30-60 seconds after you start it. as far as the fluids go, and in particular engine oil, they are designed to work ok at low temperatures. believe it or not your cylinder walls are not perfectly round. they are oblong because the block is not equally thick in all directions and therefore expands with heat by different amounts in different directions. The engine is designed to work BEST at operating temperature and acceptable on cold starts. The longer your engine runs while its cold and the piston rings and cylinder walls haven't fully expanded, the more exhaust gas blows by the rings and mixes with the engine oil. The fastest way to heat your engine is to drive it because more fuel is burned and thus more heat is made. As EE showed even after 15 minutes the transmissions has not received all that heat from the engine and is still many degrees away from operating temperature. The piston "blow by" when running cold is one reason "short trips" and "stop and go" are considered "severe" operating conditions which require shorter oil drain intervals. Both cause more mixing of exhaust gases with the oil which in turn changes the oil unfavorably.
This is why I love EE, I would have never thought I needed this information till I saw this video!
you don't. It's just cool to know.
If you're the type to hop in and stomp the gas, it's pretty helpful to know that even after warming up, the transmission is still pretty much ice cold.
Well yes if you don't drive the car while it warms up. If you drive it gently the transmission will warm up too.
This^ also if you drive manual you can feel the tranny oil getting thinner and easy to change gears. The transmission seems to warm up quicker than the engine on my car.
This was really cool to watch, great job Jason!
Thanks Matt!
I wish we could do Slow Motion in Thermal. I love this camera
I read somewhere that you can with this camera, but it will record at a lower resolution. I think 120/240 fps was possible, but I also believe there is additional hardware needed to make it happen.
Engineering Explained well imagine filming like friction welding or something with our Phantom Flex 4K, or the Phantom v2512 , would be cool if there was some type of thermal filter to put in between the camera and the subject.
You can do slow motion thermal.
The FLIR X6900sc does 640x512 at 1000 frames per second.
It costs about as much as your Flex4K, if not more. Oh, and each lens is around $3-5k.
Legend said that if VTEC kicked in yoo the camera will break
LA of LA no doubt lol
Crush camera or your face?:)
The drive belt gets much more hot than I expected!
Cars Simplified ikr hard to believe it lasts so long being rubber and being that hot all the time
..."No doubt the S2000 is a better looking vehicle"
Kyle Chambers no doubt, no doubt lol 😅
I stopped watching the video just at that moment lol
Kyle Chambers The s2k may be hotter, but the subie is cooler 😎
s2k all the way
Nail on the head.
I love how he said the S2000 is a better looking vehicle. S2k love!
That OBD data feed just triggers my inner geek :D
Jake Fuller Though, it would have been more readable if the RPM had been shown as average over 1 second or so.
Do you know how that is displayed is it an app or something ?
Nice job. A huge car nut here. I am constantly amazed at how much of a compromise internal combustion engines are. In this video, I see all that fuel being converted to heat!
love that subtle touch of humor you insert here and there
This is nice. Makes me think about the expansion and the compression of the metal as the engine runs trough its heat cycles troughout its life, and the heat and how it dissipates to all the plastic components around them.
Excellent presentation!
This is by far one of the best videos you've made. Really enjoyed it! Thank you. :)
Really appreciate it! Took quite a long time to make. :)
love your videos, I'm at my 2nd year at my first engineering job in the automotive world and I absolutely love doing analysis projects like this! keep up the great videos!
This video is an engineer's wet dream. Data occupying nearly 100% of the screen. God bless.
Haha, yeah. While editing I kept think, ugh... this is way too much data. I think it's cool, but it can certainly be overwhelming.
A geek fact about emissivity: if the hot plate of your clothes iron is metallic and shiny smooth, it will not show at all on a thermal camera (the emissivity is 0). Even if you set the iron for 200C, all the camera will see is a 'mirror' reflecting the much cooler thermal sources from around the room.
Also, hot (normal) air doesn't show up (e.g. from a heater element); the atoms/molecules are far too small for absorption or emission of 'thermal' wavelengths.
We use similar equipement at work for our Hi-Power test on jet engines but nothing that come close to it as far as the resolution, its pretty amazing!!!
Super interesting video! Thanks for the comprehensive information shown! Top job mate!
Amazing content with meaningful analysis of a lot of data that you had there. Great Job Mate! Loved the video.
You just presented a master's thesis in a 5 minute video!
For free!! to the public!!!
wow!! well done and thank you!
Haha, I don't know about that, but it is a ton of data packed into 5 minutes!
I think this is an excellent example of bore and stroke on thermodynamic efficiency. The Subaru has a square bore to stroke ratio, whereas the S2000 is slightly oversquare meaning the bore is larger than the stroke. I'm actually surprised the F20C motor isn't more oversquare considering it's high rev limit. Anyway, the increased surface area of the oversquare motor means greater heat transfer in the combustion cylinder to the walls of the cylinder, partially contributing to the S2000's motor warming up too.
Another funny thing is EE has a preference for cars with motors that have codes "F20", with the Subaru having the FA20 and the S2000 having the F20C motor.
$40k camera, $10k car
wow the best video seen in a while. love the high definition of that 40k thermo camera. thanks for sharing ;)
your jokes cracked me up xD Good stuff man..been following you for a while. With the content you make (all your videos) plus some researching, someone could make a decently fast and reliable vehicle.
Thank you I really appreciate you sharing this thermal camera footage!
excellent video, the thermal camera was a great asset to this knowledge to this acquisition.
Congratulations on 1 million subscribers!
This is why I love Jayson.
Great editing! Keep up the great videos
I like the very professional look this video has, and I hope to see more thermal video in the future :D
airflow while driving with closed hood (bonnet) is waay different. and some manufacturers actually take that in account while designing (like bmw). maybe with the hood closed and driving at least 30mph s2000 can have lower temps than subaru. i am not saying that is a fact, just a scenario that would be interesting to test and compare with these results. and small edit... transmission is stationary now. while driving friction could warm it up faster?
Engineering Explained: taking idling around the garage to new levels.
i'm impressed how long it takes to warm up an engine... never flat out before 20-25 min of warming !!
very interesting. That explains what is going on with our outback. good point on the transmission. I'm a racer and I wonder now if different cars have an advantage in how they cool the internals. well done.
Just what I wanted to see after your last video. (Oil temperatures vs Time)
Thanks!
I love your vids man!! So enjoyable :D
best video ever! hands down
I do not mean to impose, but here's a suggestion: configure a set scale for the temperature color.
It seems that every video online suffers from this, and no one seems to think about it. It is very weird to the eye when a belt warms up to the exhaust temperatures almost immediately. And as part warm up further, it appears as if they were cooling down instead. A set scale would allow to observe the actual rate and differences in temperature. Particularly in case of comparison videos.
As always, thank you for your work!
I had the same thought, until I tried it, which might be why so many of these videos use a sliding scale. Unfortunately, when you use a set scale, the image quality seems to be pretty poor because the camera doesn't differentiate temperatures well, so all you see is a dark, undefined mess. Only when temperatures start to get close to the high of your scale, does it start to show clearly. Using a sliding scale allows you to observe all of the components without all the colors running together, so you get a much sharper image.
I guess battery leads on the S2000 is one of those things that would be lost in a set scale. The hot spot on the rocker cover would also be lost.
That's a shame. There's nearly a 50% difference in the middle of the video. I guess it would be great if the sale would equal at a given moment.
Perhaps Flir should have the ability to adjust the scale in post (wishful thinking, I know).
I wanna buy one just so i know when something is too hot to touch. Definitely worth the $40 camera you got
The real star of this video is that camera. That thing is drool worthy.
Hi Jason, great experiment again! However, I find it would be clearer to use a fixed manual temperature scaling to see the evolution of the engine warming up. Granted the contrast is better with automatic scaling but then we cannot directly compare the two engines.
Awesome video. This is the stuff I love to see, thanks for sharing this.
Fun fact: I've built those cameras and now work as a service engineer for Flir. =D
Awesome! It's an incredible product!
See if you can borrow one of the cryo cooled (operational temperature of the detector is about 80 Kelvin - brr) HD units like the X8000SC or something. Those buggers are insane. With a CO2 filter you could watch your car breathe.
Granted - the price will need another 0 or two at the end of it, hehe. Being knee deep in these things all day I get a bit blind to the fact that, at the end of the day, they cost roughly an arm and a couple of legs. =P
Tony McModeNut So, can you tell what makes thermal cameras so expensive? Is it the material used for the lense, which I haven't seen used elsewhere, or is it something else? Like smaller number of units over which the design costs are spread, compared to consumer products?
From what I've learned of the unit, it comes down to the image sensor. Thermal sensor pixels are about 10x as large as traditional digital camera sensors, so the sensors are extraordinarily expensive.
All of the above, really. The lenses (made from germanium) are a big cost. Certainly when you have units with insane lenses like 1000mm continous zoom that can detect a human at up to 20-30 kilometers.
As is the detector (sensor) - especially in the cryo cooled units. The precision work that goes into those coolers is amazing. And, like you said, the market (in terms of volume) is way smaller than normal cameras.
I probably need to be a bit careful about specifics, hehe, but the camera used in this video, for example, is assembled and tested from start to finish by about ten or so people. Very nice people, at that. =)
Inagine if it was possible to gauge all your 5 points with the hood closed. But it seems you need to have the hood opened to aim and to assign your 5 points. Love your channel. Thanks
Here's the scientific side of engineering. As an R & D engineer, I've performed similar heat transfer studies several times, but with thermocouples and thermistors, not thermal cameras. R & D means researching with tests and data analysis *before* developing a machine, instrument or process. The research is the science, development is the art; engineering ties them together. This is a very interesting video!
Glad you enjoyed the video!
nice demostration
Great Vid; love stuff like this EE
It would also be interesting to see the old subaru Metal intake vs the current plastic one
Very nice! Thanks
You are the best with no doubt!
Cool video. Would be super interesting, and probably difficult, to get the same data in an extreme driving scenario like a track day. Great content keep it up.
Coolest Videos ever, so much interesting data :)
Head warms up fast on the S2k :)
I just ordered their One Pro to be arriving tomorrow 🙏
Why were the intake temps shown as different on start up?
Not sure, I may have influenced it somehow standing next to it while setting everything up. Once the Subaru starts, the intake temperature drops to expected temps.
Ah yes! Very interesting observation none the less :)
+Engineering Explained Did you adjust for the thermal emissivity of each material? If you did, maybe you were just a little off with the plastic, I could see the plastic used for an intake not being exactly "off the shelf".
It would be fun to see the same data points while the vehicles were moving at preset route... Just to see what the difference would be... No thermal camera would be acceptable ...
VTech didn't kicked in yo
ThePinoyMamba It would be intersting to see how the car would idle with the performance cam profile activated.
very lumpy, as evidenced by any car running the TODA VTEC-Killer camshafts, which basically replicate the VTEC cam profile on the regular cam lobes, and remove the middle VTEC cam lobe. All the VTEC components are removed, also.
Thanks for Celcius
SwisssBolla I actually think it's spelled : sellsious.
cellseaus*
Wow.. shame on me. It didn't looked right, but I was to lazy to google xD
Lost in the Celciauss
Nicco Borgioli
Why sell-serious?
Your logo made me a Believer!
more of this with more different cars!
awesome video, thaks for using metric units...
this man is crazy.
Nice controlled side by side experiment. Apples to Apples.
Fantastic video!!!!
Do the engines use the same oil weights? Would that make a difference?
The S20000 is running on 10W-30 Full syntheitc, the Subaru probably 5W-30.
Thicker oils do get hotter faster.
Crosstrek is using 0W-20, S2000 is running 10W-30.
Engineering Explained Thicker oils creatw more heat when cold because of friction of the engine parts with the oil itself, but i think the Honda warmed up faster because of the more compact engine layout.
+Capri Driver
Do you have any citations to support your statement "Thicker oils do get hotter faster."?
No.... nowadays you don't have to change the oil in the summer and winter, if your car specifies 5W.30 you should use that in the winter and summer, my car specifies 20w50 so i use that all year.
You should perform this test on a older carbureted engine. Also would be cool to compare a liquid cooled sport bike motorcycle to an air-cooled V-Twin.
@4:03 HA! Good one Jason! :)
please do a warm up time lapse of an air cooled engine
I'm a simple man. I see VTEC, I like the video.
Now wrap the exhaust and headers with thermal tape and compare, could also try that reflective gold tape on intake manifold.
Awesome video!!!
Wow, resolution on that camera kicks ass. Most thermal cameras are quite blurry
Hence the price tag, because of the sensor size.
Appreciate Your effort , great video , good quantity data ! It would appear that when an engine is not working to hard , in this case idling ,the oil temperature will almost certainly not exceed the coolant temperature. So exessive [idling] will not really raise the oil temperature to 100degC where an oil is able to work probably and importantly water /moisture can evaporate off. 5 minutes looks sufficient for those owners who appreciate warming their engines .Graeme
in regards to intake temp readings isnt the subaru intake temp sensor built into the air flow meter? so it will be in the intake pipe close to the air box away from the hot engine. the honda would most likely be fitted in the manifold closer to the engine giving a higher reading.
Should do another air ballon video with the thermal camera. Just to see how hot the exhaust is.
Just amazing!!!
So cool👍🏼👍🏼
Would be interesting to see this test again in summer, to see how quickly the cars get up to temp. I'm always wondered how close operating temperature the oil would be in my car on a 40C day within a few minutes of normal driving.
Very nice statistics.
You should test intake temperature with and without thermal wrapping and if wrapping plastic and aluminum intakes makes a difference between the two
how hot does a timing belt get and how hot do the cam sprockets get? my cam sprockets are too hot to touch after engine has been running for an hour.
this is a really interesting video and it sparks a question:do engine temps depend on the piston layout?
love the vtec joke LOL
@4:00 - When engineers try to make jokes. :D
You need to be more careful, that engine is equipped with VTEC yo. When the VTEC kicks in yo the engine produces so much power it could cause a sonic boom from the dankness and kill anything within a 4 mile radius.
I will get the new CAT S61 phone on friday when it comes to shelves. Res is less than this one but the range shoul work
I'm still waiting for you to make vids of the modifications you'll do to your S2000
Thanks to my doors auto locking when the car is started, I've done a near 1 hour test of letting the car warm up with no throttle. My 1988 Buick Reatta with a 3800 V6's coolant reached 90C in a tad less than 10 minutes in about 10C ambient temp.
Attach cpu heat syncs to your Honda intake and see if you get more power, that would be a cool video.
And, since the S2000 has a higher static compression wouldn't it produce higher combustion temperatures?
Not really, it warms up faster because it's more compact in my opinion
That's interesting to think about! Higher compression ratios mean higher thermal efficiency, meaning more energy is turned into useful work rather than heat.
Yes, but it also makes more heat overall, due to higher extraction of energy, and since there is less heat going out the exhaust, more heat ends up in both doing mech. work AND in the coolant system. "We" see that very often on relatively high compression (E85 fuel) turbo engines. running a MAP of 300 kPa (2 bar boost) on say 9.3:1 CR, vs a normal E5-E10 gas engine doing the same boost but with a lower CR of say 8:1
Great video! MORE I TELL YA!
Why did you measure the oil temperature with a seperate device instead of the ODB2 scan tool listed in the video description? Is the oil temperature data not available through the ODB2 scan tool?
Really awesome and interesting video, I actually have been wondering this very thing ever since you talked about how long should you idle before taking off because I've been having some idling issues with my 9-3 Aero. Mine actually doesn't go below 1800 RPM no matter how warm it gets. Is that a function of the Turbo or not normal? Crazy how if you wait long enough on the internet your niche need is met.
Still winter has had to have been hard on you.
I think it would be pretty cool to have the same, static gradient scale to compare the two motors directly. (0 to 100 c)
To calculate the temperatures at various points through the thermal camera you must have kept in mind about the thermal emissivity of materials which is to be set in the thermal camera. So what emissivity you kept?
If the valves are adjusted properly the head will heat up quickly as the exhaust valves sheds it's heat to the valve seats and guides.
Very nice!
Most new cars with very efficient engines have electrical "auxiliary" heaters built in as standard (e.g. VW Passat, VW Golf), in order to warm the coolant up quicker, to get the emissions down as soon as possible and to comfort the driver and the passengers. Is this the case for both the Honda and the Subaru? This would have a great impact on the time that the coolant needs to warm up.
I'm hoping for a complete EGR run down with all the modern CRD engines. I hear the science goes beyond just emission control...
Thanks for the video. Is there a chance you do this on a Hybrid that has an EGHR to show how quicker these engines warm up and stay warm? I'd be very curious to see how it works.