Comments by "Mikko Rantalainen" (@MikkoRantalainen) on "Misha Charoudin" channel.

  1. Another interesting take to the traction is to pretend that the tires have exactly as much grip sideways as forward and back. Therefore for maximum cornering performance you cannot apply any brakes and for maximum braking you cannot apply any steering wheel. And for situations where you need to brake and steer at the same time, performance of braking and steering are both limited because the sum vector exceeds the limit. This is not exactly true in real world but close enough to make it worthwhile to pretend it's true.
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  2. Great video as usual. The rear view camera was positioned exactly horizontal to the rear wing so all the distant cars were blocked by the wing. Future videos should probably put the camera intentionally above or below the wing horizontal level.
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  3. 13:56 It's a shame that neither of you noticed the chime for low tire pressure.
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  4. A minimum, the dude getting out of the car would have had both of his legs crushed by the door if Misha had failed to avoid the collision. With modern cars, just sit in the car and keep the seatbelt tight if you cannot safely exit the area. And I fail to understand how they couldn't get the car to move downhill even with a broken tyre.
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  5.  @_clutch_3634  That works until you get any mechnical malfunction. Blow a tire or snap any control arm in the car and the wheel will spin rapidly if you don't hold it.
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  6. It seems that he was checking tire pressure and temperature before the hot lap. If you don't check those, it may be even more dangerous than releasing the steering wheel for a short time on straight section. Of course, optimal solution would be to have another display or some buttons wired for the left foot so you don't need to be pressing buttons with the same hand you use for steering.
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  7. It seems that the hood popped open already around 2:50. Interestingly the warning about it came up at the end only.
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  8. 7:20 Wow! The mechanical traction of this car is insane!
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  9. If the ECU is not fast enough to handle the boost pressure, maybe go with analog limiter for boost pressure and add Dawes Device to the system? I used one in an old turbo diesel that had a bit sticky VNT mechanism and Dawes Device was able to reduce the boost whenever the ECU wasn't fast enough because of a bit sticky VNT mechanism. Of course, Dawes Device only works with vacuum controlled turbo.
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  10. Great to see a car with focus on suspension and brakes for a while. This car was properly fast, BTG around 8 minutes with the yellow flags.
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  11. I would love to see how blinkers work in modern BMW cars. I guess they have some kind of turn indicators both in the instrument cluster and outside but I haven't ever seen one in action. From this video I could figure out that there are two stalks behind the steering wheel but what's the purpose of the left one is still unclear to me.
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  12. Walter Röhrl was truly a legendary rally driver because he didn't want to win the championship even though he obviously had the skills for it: https://youtu.be/6lo4dGTrzr8?t=365
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  13. From the video, the snapped rear suspension rod had such a clean cut that it seemed more like a fatigue fracture instead of impact fracture so that's definitely suspicious. I would take the cut to some lab or manufacturer for inspection (you cannot trust the design if it failed because of metal fatique). However, the snap sound seems to match with streering wheel movement very accurately (I would say more accurately than human reaction time) so that would suggest something failing on the front suspension.
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  14.  @ilvesman  Yes, to be able to figure out this kind of crashes, you would need multichannel audio recorder in the car and have maybe 6–8 contact microphones glued to the body of the car. And even then, it could be only be used to differentiate between driver error and technical error. And as it appears that Misha is going to take responsibility in either case, it really doesn't matter in the end.
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  15. 8:00 Working with cars with rust, the tear down is always the hard part. I've fixed parts where getting one part off without breaking nearby parts took 4 hours.
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  16. 4:36 Could you comment on what were you thinking here? Your facial expression suggests that something surprised you about the car.
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  17. Yes, if it's your own car, definitely go with glue. However, this is not Misha's car so it will be fixed up to factory spec which means no glue.
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  18. 9:25 This Yaris sounds like a big truck to the mic!
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  19.  @Twenty3_Motorsport  If you run VAG engines in OEM spec (including the special engine oil lubricants they require instead of some "high quality" aftermarket oil like Mobil 1) they will last. Not that good for tuning or chipping, though.
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  20. Surpringinly many modern cars have such a wide A pillar that you have to keep peeking around the pillar all the time if you don't like driving blind.
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  21. 7:20 I don't know what that "Throttle Pos" display is actually rendering but definitely not throttle position.
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  22. Note the speed while the car gets off the track: the speed is low enough that you could be doing this on your own car! Don't assume that there's any traction when the road is very wet.
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  23.  @ArtVandelayOfficial  That's interesting. Can you hear it from the engine sound?
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  24. Congrats! I think I started to follow this channel around 300K so it has indeed grown fast.
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  25. Imagine driving this car in 1984. Nowadays you can find all kinds of supercars that are better on track or road but back in the days, there was much less options and the cars that normal people were using were a lot worse.
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  26. Did they explain why they didn't play the horn and flash the lights?
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  27. I hope you can figure out what failed in the brakes. Even if brake booster had failed you probably have strong enough foot that that speed would have been at least slower during the crash. If a brake hose had failed, there should have still be two working wheel brakes in worst case and the pedal shouldn't have gone hard but go closer to the floor than usual. And from the description that sounds like the wheels didn't lock either so it shouldn't be ABS failure.
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  28. Yes, especially the part where he returned from grass to to the track and had to anticipate when to start turning back from the opposite lock not to spin when front wheels get off the grass. It's surprisingly common that driver can catch the first slide but cannot handle the return from slide to going straight because the traction can catch back equally surprisingly as it's lost.
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  29. 0:07 When the instrument cluster flickers like this while you're starting a TDI engine, you can be sure that it's time to replace the battery.
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  30. Great driving. There didn't seem to be much more you could extract from that car on that track even in theory.
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  31. It seems that Misha has been driving so good cars that instant "keep pumping if brakes don't work at first try" reflex didn't hit.
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  32. Base stations require IR emitters from the goggles to be visible to all the basestations without any interference. And interference may come from reflections – do you have any shiny metal, window surfaces or mirrors? You could put a bright light near the position your head would be in the rig and then put your head at the location of each base station. Look around, can you see the reflection of that light anywhere? Another thing to consider is additional IR emitters. If your screen on the steering wheel leaks too much IR, it could mess the system, too. And if you have to use long USB cables, the cable quality is important if it goes near any power cables. Other than that, electrical interference shouldn't be a problem. I would love to see DiRT Rally 2.0, Richard Burns Rally or BeamNG content in addition to ACC which is obviously closest to stuff you're doing with real cars.
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  33. It seems that if pre-cooling the battery allows running the whole lap, Ring Taxi may probably have to get one of these. That would allow green-minded customers to get lap without CO2 emissions.
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  34. Interesting video and it was great to see doggy style stuff in between.
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  35. This is sure a fine car but it's surprising how close Tesla Model S Plaid can get to this level of performance for Nürburgring. Bugatti would obviously win any straight line max speed test but for rapid acceleration and cornering speed this was in the same class with Plaid.
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  36. Another good example why you should focus on suspension before tuning the engine a lot.
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  37. My thoughts exactly. It's obvious that the car was driven nowhere close to its limit.
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  38. 6:08 If you had even checked your mirrors at bad time, you would have crashed! Really close call.
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  39. 10:35 Many cars without dedicated mirror heating will actually heat the mirrors, too, when you turn on the rear window heating.
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  40. Great that you're okay and I'm already looking forward for the rebuild video.
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  41. 21:14 What kind of rules do you have in this class? Was the yellow car in front of you to cut the corner here?
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  42.  @MrAchilles113  For appearance that wing is huge but compared to the weight of the car a wing like that with roughly horizontal setup is pretty meaningless, in my opinion.
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  43.  @vollcare4076  Hard to say from the visual appearance. I would guess maybe half less. Basically near the same difference as having tank near full vs near empty.
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  44.  @mihaiceclan9849  Especially on street tires.
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  45. It's interesting that Porsche GT2 RS MR seems to be much faster around the lap than this. Pure max power is good for straights only, no matter how well the car is made otherwise.
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  46. 11:06 "It feels underpowered" while doing 230 km/h and rapidly going to 250 km/h.
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  47. That was some seriously smooth driving! I don't think many could drive BMW M2 around that lap much faster no matter how many working legs they have. Once he installs 4–5 point harness, he'll be much faster because now his body is bouncing around which will limit how accurately he can control the brakes.
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  48. 9:05 Passanger/owner of the car is breathing heavily and regretting not wearing a g-suit and meanwhile Misha is playing a secretary and asking if he wants to take the incoming phone call while driving the damn car. That's what I would call Experience.
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  49. There's something really wrong in the world if this guy doesn't get high end engineering job for this car alone!
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  50. That's nice car and some pretty awesome driving. I don't think many people in the world could lap faster in that car.
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