Youtube comments of Makan Tahi (@makantahi3731).
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i do not agree with you:
1. 02:47, you said that puls travels with local speed of sound what is 1400km/h, that means that temperature inside of exaust is 101c deg, what is very wrong, when engine works, after few minutes even if outside is polar coldness, it reaches temps over 300c deg, so speed of sound would be 1732km/h
2. i first part you explain how it works on single piston engine, but is more important how it interact on more piston engine
3. you chose wrong way to explain this topic, you should speak about volume of gases that leave cylinder , enters into primar tube and make low pressure behind when ex/valve closes and makes suction in collector in other primar tubes, x pipe would not even mention
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@TheSuperBoyProject there are 2 curves, needed power in depend of speed, - it changes by 3. potency( if you go 2 times faster you will need 8 time more power) and engine power curve with fuel consumption, there are these two curves crossed that would be optimal speed power point, but all engines work with variable efficiency , petrol engine can use more fuel per km at low speed than on higher speed, but usually it is around best torque or below, for new diesel engine it is a tricky because it keeps high torque through long range of rpm, so it seams that speed for the lowest consumption is on low speed range and not at highes efficiency because to get high efficiency ,has to be some adequate circulation of air/gas inside of engine and smaller/weaker engine will reach optimal speed earlier than bigger/stronger, best is to test it on highway if car shows real consumption, but do not go to slow because dpf.....
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@martinsvensson6884 thanks, i invested some 30 euros in this project: 2 dolce gusto caffe machines-used "broken", but if i wanted to repair it i had just to clean scale, but i just needed heaters, i bought good water pump on 12v and 2 relays, that device is remote, i just pull off hose from expansion bottle on car and connect that device on and it starts to circulate coolant, every heater has its own cable so i can choose one or both to work because each must be connected on different plug because fuses are mostly on 15 amps and it could drain more, i use it on big engine(5.7) if outside temp is below 15 c (one) and if temp is below 0c /both)whatever , in 30 minutes engine has temperature of50 c , on second car with small engine i made permanent system with 4 diesel heaters that help to heat up coolant when engine is started, they drain 70amps, and speeds up switching from petrol to lpg for 30-50%
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thank you for your research, but it is made on wrong way: if you wanted good numbers you should do it on this way:
1 install new oil filter, air filter and replace old oil with new,
2. drive it for 100miles and then replace all 3 things( do not throw it away, store it for use after research is finished) to clean engine from old dirt
3. install all 3 things new and drive it for next 5k and then take sample(do not replace oil, and filters, just take small amount of oil and send it for analysis), and do same for 7.5k and 10k.
4. now you would have consistent analysis numbers , because is not logical that 7.5k oil is cleaner than 5k oil(in you case is because 5k oil collected all dirt from old oil and old oil filter
5. dirt in oil works as positive loop-as amount of dirt rises, it produces more new dirt as milage rises, dirt in oil works as sand paper.
I replace oil and filter every 5-7000km and on 200000 chain is still as new, my oil is never black on exchange, it becomes brown
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@20somthingrealestate you speak about race diesel engine? who drives diesel as petrol,btw,800 f is about 420 c, and you think it is big deal,petrol engine has that temperature on idle,if we speak about highly modified tuned diesel engine,take a look on gale banks channel,he made ultimate engine that works with 14:1 a/ f ratio at top power, so diesels for general use have half exh temperature of petrol engines for same powre rating and way of use,and second btw do not tell me to learn english because if try to speak in my language,you would sound like bigger ignoramus than you are
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thank you for video, i just asked myself what kind of pump is for steering wheel, but i have some doubt: i think that bypass valve in pump is only for safety to prevent overpressure, i think that when engine is working and steering wheel is not turning, oil does not bypass inside pump, it flows freely through rack and back to pump, if all oil is bypassed in pump , then would not be difference in pump load between situation when steering wheel turns and not turns- it can be noticed by noise of pump and engine that in first moment slowes down and then it speeds up to keep same rpm and it is different depends of speed of steering wheel rotating, i think that main idle/ bypass valve is in rack and if steering wheel is rotating it allows oil to enter into working space of rack, if is not move, oil just back to pump with no resistance/load/pressure, and when steering wheel is keeping in end position then apears some sound from pump that looks like bypass valve in pump works
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this is a fast car, but not as much as the speedometer shows, at 300 km/h it should exceed 82 m/s, and for 100 meters it would need 1.22 s, and it needs more than 5 seconds : on 3:49 is 077.4 km on lower odo, on 3:55 is 077.5 km, comparing the distance markings on the highway, at an acceleration of 250-300km/h it passes 1 km in 14 s, which is 257km/h on average, and odo shows a difference of 200-300m, 3:39-3:53
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i do not agree that here is insane engineering, all ideas and solutions are known even i was in aviation highscool, when was first pw4000 , ge90 made, btw, up to 40 pressure ratio, efficiency raises almost lineary, but after 40 it slows down, looks as asymptote, it is more brave to install all possible things that will raise overall efficiency of airplane(electric brakes, air conditions,leading edge heating....)
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ha ha, is anybody suprised with result, story about hho is scam as religion , no evidence, no proof but many think there is something, same as god yeti , aliens, let clear it with some facts: law of energy conservation : you can not produce more energy than you invested in procces, so alternator eats about double mechanical energy than it produces, making h and o is not more than 70-80% efficient, so loss is 20-30% , and you bring it back to burn and your engine works with some 25-30% efficiency, so if you take 1000w of mechanical energy from engine you get 500w of electricity, what makes 450w of energy of h and o, and then it burns and makes some 100-130w of mechanical energy, so you lost 90% of invested energy!!!!.
i tested that system, it was imagined by some bob boyce, and main part of this system is some kind driver that makes from flat dc current changable pulsed current(not ac) with 3 frequences that helps to make(by resonance) same amount of h and o with 5 times less current consumption(instead 25 amps you need 5 amps for 2 liters of hho in minute) but it looks like some perpetum mobile because you could make with energy of 5 amps , energy of hho of 25 amps, so you could drive just on water.
ok this was dark side of this.
now bright side: some parts you missed -lambda emulator that fools you ecu , to force engine to works on lean mixture and then h /o helps to ignate that lean mixture, so here you can get some mpg(petrol engine)or to burn soot in diesel engine.
it works best on old and worn engines that produce lot of unburned partickles, soots, fuel.....
on new, good engines , no gain, just pain when something breaks.
i made that system: bubbler, electrolizer by ss316 plates, pvc seals, and i produced 1.8 litres of hho by 25 amps, when i turned on, engine rpm falled for 200 rpm, on idle, very soon my alternator died, and pvc seals started to decompose -some kind of oil occured on top of naoh in electrolizer, and seals become brittle, and bubbler could not clean naoh from gas so it cloged carburators butterfly. and this was end of it.
i did not have electrical resonance device to reduce current consumption, because it is electronic device and some smart guy sells it for 500$.
any questions?
thank you for watching!
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@morpheus_9 i see you are specialized in spewing bullshits , listen to me , you bullshits specialist with limited knowledge: do you know why if mixture is lean exhaust gasses have hotter temp , if you know, you should not mentioned it , in petrol engine , lean mixture has extended time of combustion , what means it still burns in exhaust, next fact that you do not know is that in diesel engine, locally mixture is rich but overall is lean because diesel engine works with excess of air , so that is why same power rating diesel engine at same power has less temp of exhaust, next thing that you do not know is when petrol engine has best power: it is when combusted gasses in cylinder have the highest temperature because best/the highest mean indicated pressure is on the highest temperature in cylinder, and that is at rich mixture, but why rich, not stoichiometric?, because petrol falls apart due to dissociation of some amount of fuel, so need to be some more fuel , and a little richer mixture prevents knock, so in this comment is more new facts for you than you know at all,
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@changsangma1915 you are right, english language is problem because i am not natural english speaker and it is hard to explain something to people that think they know much, but they do not know much, but they speak english language good, so we can do it on 2 ways, 1. get use on broken/international english or 2.we can discuss in my language, so you could learn my language or you could use google translator, but in both cases , you would soon realized that my broken english is not so much broken as would be your attempt to speak in my language, if you wanna try, ask me in english i will answer in croatian. Next thing , what skills you have that you can recognize if somebody is engineer or not, i can , because after all i wrote just in this comment on comment reply, you did not recognize misconceptions and shallow knowledge guys that discussed with me, so maybe you and they are engineers but not for engines, cars, materials and technology, (they are maybe cheefs, cowboys or just regular guys that like cars but do not have wide theoretical and practical knowledge about things they like), ok, i am waiting for your question, to see how it will go
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so , your question is a little strange, for you it would be better to see open view (blueprints and planes)with visible parts of harrier, harriers engine, f35 and f35s engine, you should be familiar with jet engines, phisics-thrust , cg, lift , position etc, but i will try to answer: harrier has turbo fan engine with separated outlet for cold and hot gases, on all jet engines/planes air inrake is on front, and cold area is on front and hot area is on aft /rear part of engine/plane, is it clear, so, it would be hard to bring hot gases from turbine/aft part to front part of plane/engine and there is no need for that, is it clear, vtol plane can not be hanged on one blast of engine, it would be very unstable so it is needed at least 2 blasts-front and rear, so front can be cold and rear can be hot, as it is , on f35 they could choose: engine like harriers, 2 or more engines or one engine with front verticaly mounted fan that is activated on demant, over clutch, propeled by main turbo fan low bypass ratio engine, and for jet engine problem is if it suck hot gasses, but is less problem for fan engine because not all sucked air goes through primar/core part of engine to burn, so on harrier is bigger chance to suck cold blast than hot, but is better to avoid it
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why old cars like this, with big displacement, have less than 50hp/litre, škoda felicia has 52hp/litre, what engineers did not know then, : small compression, low valve area, lift, short duration, what? engine head with low flow?, ok electronic ignition and fuel injection bring some small gain but there is still big lack of expected power
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lpg has 104 RON octane number, burn speed depends of pressure and temperature, if engine is designed for 95 octane , 90 octane will burn faster, 104octane fuel will burn slower, so if you wanna use 104 octane fuel on 95 octane engine you have to change spark plug time, advance it because it burns slower, but if you heat up fuel to some temp, spark plug timing can stay same, that why lpg is overheated in evaporator, and that is why engine losses some hp , not much, but if you do not overheat lpg and change spark timing you can get some more hp
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@legioner9 dude, here only you are confused, i said wheel(rim+tire) dimension, you are trying to mitigate damage for you, you watched tire-rim calculator -to instal bigger rim and first smaler tire to keep same wheel perimeter, but i said to install bigger wheel , it means that if you had205/55R16, install same tire on R17 what is4% bigger wheel perimeter so at 250km/h on bigger wheels, on smaller would be 10km/h less, what is still not enough big to compensate 15-20 km/h speedo error, ideally would be 225/55R17 with 7,5% difference what is 18km/h at 250km/h
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first , you should be much better driver to manage to go straight with blocked front wheel, i do it regulary to train balance, and here is important something i call traction management, when drive on steep uphill, over roots, stones etc, rear wheel can slide over it and driver is here to overcome it and to give enough force on pedal to keep going up but not to slide wheel espetiali when go very slow, short slide and bike will stop. second , you must be familiar what hand is what brake, and have program to operates it, so, my right hand is rear brake and i vibrate with it in very short and fast intervals and that gives me information how much is traction and optimise frontbrake/left arm, usually i do not vibrate with front brake in non slipery condition bur today i wend downhill on melting snow and both brakes blocked and was very tricky, speed was 3-5km/h because faster could not steer bike by corners, so i vibrated by both brakes to ensure traction and braking force without accelerating.
that brokenly braking must be in very high frequency to have countinius rotating of wheel on border of rotation/locking wheel.
your system is to hard -to much of locked distance and can not know when it will block /release,
rear wheel i use to steer by locking it, too.
cars abs/esp are not invented by instant, they had to work hard to made good system that can help to save car/driver,
good try and good research for you
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@kaisertrinityt.m.i.s1607 on chanel burns headers, stainless steel, they adviced to use inconel but it is to expansive, second was AISI321 it is unavailable for me and third was AISI 316 that i can find but is double price than AISI304, 15€ per metre for 42.4mm diametre , 1.5 mm wall tickness, i have old header as template that was made with 40mm diametre tubes, that was to narrow, welds were made too rough, with no cone/spike in 4in1 collector, etc, and benefit was on rpm 2500-3500, after that it choked engine, so much that o2 sensor was bent inside of collector
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@igornoga5362 one lesson from aerodynamic, if you have ad tunel with smaller diametre,in middle and after expands,(venturi tube) and forces some gas(air) to flows , as raises pressure , speed raises , until pressure reachs 1 bar , in smaller diametre, speed reaches 1Ma, if pressure raises more, speed in smaller diametre is still 1 Ma, but in part of tunel where diametre expands, speed starts to raise over 1 Ma, so you have supersonic speed, same is in exh primar tubes, gasses from cylindre are under pressure and when exh valve opens it expands into primar tube or collector with supersonic speed, with no muffler you will hear bangs-what is supersonic expansion
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