Hearted Youtube comments on Engineering Explained (@EngineeringExplained) channel.

  1. Never took your vids very serious but now that you’re wearing those glasses 👓 you’ve got so much more authority!
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  2. I had a set of Continental Extreme Contact Sport tires on a 1987 Acura Integra for a few years. With those tires, I was competitive while autocrossing against 9th and 10th generation Honda Civics with nearly 100 more horsepower but on all-season tires.
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  3. Ayyy that's my university. We get told about the VW thing at least 5 times a year at engineering events
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  4. Can't tell you how many old guys I have argued with about this. I quit years ago. Velocity they confuse it with back pressure. Yeah smaller pipes have high low rpm velocity, so you get better low rpm scavenging and better low end power. But then at some point they start choking the engine.
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  5. Hey man, I heard you like intercoolers so I put an intercooler on your intercooler
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  6. I actually bought my '23 in part based on the recommendation from this channel. Awesome to see it back!
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  7. turn 90 degrees up cut hole in hood cold air
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  8. Pointless you say yet I feel smarter after this video...I'd definitely give this channel most informative award.
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  9. Really nice informative video. A couple of additional comments from a former battery management system engineer, to the real nerds out there: First, charging to 100% affects more than just range estimation. It also effects accuracy of cell-to-cell balancing, and hence actual range! Small leakage currents in some cells inevitably cause charge differences to accrue between different parts of the battery over long periods. The circuitry needs to correct these imbalances by "bleeding" charge off of the higher charged cells or cell groups. It can only do this if it knows which cells are more charged! If the cells aren't properly balanced one cell/group will hit 0% before the others, leaving energy on the table, and as a consequence the vehicle will estimate (and deliver) lower total range. Even NMC chemistry balances better when fully charged occasionally. Although more steep than LFP, the NMC charge/voltage graph's slope just isn't steep enough for <1% accurate balancing in the middle portion. You'll get up to a couple more percent range from NMC if it can reach 100% every so often and re-estimate charge there, and re-balance more accurately. Second, it's important to understand that all battery management systems use "coulomb counting" (monitoring discharge current) almost exclusively to estimate range, at least when driving. This is not just for LFP, NMC absolutely does this as well. The cell voltage fluctuates wildly during driving as the internal impedance of the cell causes varying voltage drops under varying load and really can't be used for charge estimation very much at all while driving. In fact, even once the car is parked, NMC systems can't just immediately look at the cell voltage to recalibrate the current accumulator that tracks charge. Not only do cell impedances have time-dependent components that take minutes or even hours to stop exhibiting small voltage drops, but cells exhibit all sorts of irritating effects that temporarily change the cell voltage, such as hysteresis and other history dependent effects. These effects tend to go away over time (and faster when it's not freezing cold). So for NMC the car wants to be placed at 100% occasionally, and left there for at least 6 hours or so, and preferably not too much below room temperature. This will allow more accurate recalibration of the accumulator, and more accurate balancing. Now the actual algorithms are very complex, the car will get progressively more confidence that it understands where the charge level stands as the cells rest more and more, so even while driving the current accumulator would be updated if it disagreed wildly with the cell voltage, and the convergence just gets better and better if you give it more time with no current draw at a steeper part of the cell curve. [oh and it really should be plugged in for this so that the battery doesn't have to support ancillary equipment, and really has no load on it for those 6+ hours] One last bonus point, not so much about delivered range but about range estimates. Although slightly sketchy feeling, it's actually also helpful to discharge an NMC car to low charge levels, where the voltage curve bends down, for the same reason of estimation accuracy. (It doesn't need to be 0%, but say below 15%-20%). Probably true of LFP too but no first hand experience with that. The same as near 100%, the charge/voltage curve is steeper here and the car gets a better idea about what's going on. Again, the car the needs to sit there for at least 6 hours or so and not be too cold to "rest" the cells and let their voltages precisely settle. This is ideally done in close proximity to the 100% "rest" described above(like the previous day or the next day). Once these two "rests" have happened the battery management system now has a very, very good estimate of the total capacity from 0% to 100%. It doesn't have to extrapolate too far, since it's just recently been near 0% and 100%, and thanks to the steep curve at the ends it knew exactly where it was! This allows the system to update the estimated amp-hour capacity of each cell group with confidence, and so better know how much juice it actually can hold. Again this won't give more actual delivered range, the car stops driving when the battery voltage of the lowest performing cell/group hits the low voltage cutoff no matter what percentage is displayed. But if you don't want to ever drive below 10%, and the estimate is off and pessimistic, you might be leaving range on the table by driving to a faulty estimate. Or even worse, if the car never ever sees low charge levels and has a really badly erroneous and optimistic estimate, you might believe you have another 10% left to make that last 30 miles of the trip, and be stranded 10 miles out. It's really hard to get a car into this state, but if you only ever let the battery see the range 60%-80% and never outside of that, it's possible. That's only a 3.3% range estimation error in a 300 mile battery pack but 10 miles is a big deal if the car stops driving.
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  10. dang it just when it thought i would have a easy day and learn nothing. engineering explained: hold my la croix
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  11. "providing useless advice" lol
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  12. Wow, an actual unbiased review. Amazing. Haha. I've owned a Model 3 for about 4 months now, and you hit the nail on the head. Every downside you mentioned is absolutely the case. Every point isn't a deal breaker but still annoying.
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  13. Thank you for explaining the engineering behind the machines. I've learned about things that I never even knew existed. Fascinating.
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  14. Looking forward to this new series
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  15. Really appreciate you making these videos man
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  16. I tried to expand mine and blew the welds on the intake
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  17. You just convinced me to start using my car's start-stop system. The power of science.
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  18. "Electric cars are really fun, but they're not right for everyone" was the exact moment I hit like on this video. Nice one Jason.
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  19. Thats a nice drawing of the car you got on the board
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  20. "this is america" "i want my power now"
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  21. My wife just accused me of having a "serious man crush" on you... I thought you should know that, lol
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  22. Hydrogen be like "I NEVER KNOCKED ON NOBODY!"
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  23. I’m just gonna drive my 2010 Yaris forever. This new cars hurt my brain and my wallet.
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  24. Crosstrek blue, a man of culture.
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  25. I like this video a lot more than your others. Don't get me wrong I love all your videos, but it's nice to understand an entire video. Even if I understand your math based videos I can't apply that knowledge in real life, this I can apply to grasp a better understanding of how my car is working when I'm driving my standard car. That will help a lot
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  26. Everybody talking about dropping a fake birth year, but this is just to distract you from the fact that Jason travels with a Clifford the Big Red Dog plush.
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  27. Score on the tire treasure hunt! Thanks for sharing.
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  28. Next: I BOUGHT A FALCON HEAVY ROCKET
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  29. 6:49 - "It CAN improve significantly" (as he is touching the cans).
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  30. We all need to like this video. Because all the salty people who dislike it without even realizing that Jason only owns manuals...
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  31. It's crazy this is the first Tesla you've reviewed/driven
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  32. I love how you clear up commonly asked car questions with the math as opposed to giving a biased opinion based on your personal car setup. Your explanations makes questioning what to get for my car a much easier process. Appreciate your work!!
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  33. wow, can I have a ride? sorry, only one seat
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  34. This is brilliant, every scene had me laughing.
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  35. I’m 9 years past a 40 year career as a ChE. I spanned the years from a Post VersaLog to a Lenovo T60. My most important calculational tool was a simple chalkboard at the start and a whiteboard at the end. My ChE professors had 3 rules: state your basis, state your assumptions and draw a picture before you start anything else.
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  36. Tesla-Stan here. The new Taycan is mind-blowingly impressive. Porche delivers. Of course at a price 😁.
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  37. I owned a 2000 year VW Bora with the V5 engine years ago - Cracking exhaust sound, smooth running (thanks to all the counter balancing act going on inside) but only really made sense at 80+ mph speeds where constant high speed could be easily matintained and MPG actually improved into the low 30's! That said, it had woeful economy around town though, I once read a comment on this particular engine - 'Performance of a 4 cylinder with the economy of a 6 cylinder'......very true!
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  38. I walked out of my court hearing for this
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  39. Electrons are very kind? I dunno, I've always thought they were a bit negative...
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  40. You are like a kid in a candy store. Could tell you were having a blast. Thanks for letting us experience it through you!
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  41. Such cool work you did in this video - thumbs up and a big THANK YOU !!! :)
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  42. I have a manual car and I think it was your channel that taught me to engine brake to save fuel. 👍
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  43. Never spent so much time chuckling through comments. The auto vs manual debate will never end it seems
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  44. Damn son. Fragrance injection.
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  45. One of the few channels ran by a youth who's able to properly explain the automotive world in detail! I'm a mechanical engineer too and this is how these kind of topics should be explained! Too easy to test drive expensive cars only because you have a lot of money and saying things that everyone would be able to notice only by reading a brochure. As always can't wait for the next video! Thanks Jason \m/
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  46. 2 minutes and 15 seconds in and i already feel like this has been the most technically informative Tesla video i’ve ever watched. thank you, Jason. -long time fan
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  47. Being subscribed to engineering explained changed my mind on electric vehicles
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  48. I nearly punched you through screen for being n engineer and posting about flat earth.. But aprils fools. U got me. Nerd humor at its best. Congrats. U got me.
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  49. for anything that heavy, any 0-60 time that's not best described as "any day now", is insane
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  50. Model 3 fill up, so 300ish miles is less than $10. For $10 my truck could go about 50 miles........
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