How Twin Turbos Work - All The Boost!
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- čas přidán 24. 07. 2024
- Twin turbocharger engines. How twin turbochargers work. There are several ways for an engine to incorporate twin turbos. In parallel twin turbos, the turbos are split between the cylinders, typically with V-shaped engines with each cylinder bank having it's own turbo. In sequential twin turbos, one turbo will be active at low RPM while both turbos will be active at high RPM. Some twin turbos incorporate different size turbos, which will not be discussed in this video.
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Engineering Explained is without a doubt one of my favorite channels on CZcams. Period.
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Ditto
+1 very good and quality explanation nice and simple
Who’s on their period
Please compare the advantages, disadvantages and general qualities of each of these 3 forms of turbo charging (after the next video). Thanks.
Agreed!
Well, he did mention one, in the sequential setup you get better boost in lower RPM because you're directing all exhaust to only one turbo, which then spins faster than both together, thus, I assume, reduces turbo lag helping turbo kick in faster, the disadvantage SEEMS to be a harder setup and increased cost due to the pressure valve and the piping itself (considering that the cold air intake is not that expensive, so saving one wouldn't make much difference).
Pedro Sánchez i also think the 2nd choice would be more beneficial for smaller engines, and choosing 1st or 2nd for larger engines wouldn't make much difference
Actually, that doesn't matter, because with a parallel design, you have two separate exhaust systems, this means there's enough exhaust for both turbos. Whereas in a sequential setup, you only have one exhaust system, a smaller engine, and therefor only enough exhaust for one turbo, so it makes a huge difference.
Brady Stickles so therefore you’d only want to use a sequential turbo setup on smaller engines and parallel set ups on 6 cylinders or more?
Dude, your videos are awesome! and you make things really easy to understand.
Keep up these great videos!
I know all the auto basics already from being a tech for a few years, but I still enjoy watching your videos when I'm bored at work! Keep up the good work!
I don't know why you don't have more views. You explain it so perfectly!
Pretty awesome. I always wondered how twin turbos worked. Thanks for the simple explanation. Keep up the great work!
love your vids man keep it up
Love your videos. I wanna know more about cars and these videos are so interesting! Keep them coming :)
Love your channel you simplify thing very well and make it easy to understand. Thanks you for taking the time to make these video's.
Thanks. I was wondering how one filter can work on a twin turbo vehicle. I also like to hear you explained it. Thanks for all your videos
I love your videos! Keep them up!
Great explanation and diagram. I see this term used a lot, and had some idea of the turbocharger, but this refined it for me. Thanks.
Thanks man! That was the explanation I was looking for.
I'm so thankful for this channel.
Hey great video I was wondering in a sequential set up at low rmp wouldn't the exhaust still flow to both turbos?How does the bypass cut off the turbo from spooling up?
Nice explanation, Kid- keep those videos coming!
This was a very simple and beautiful explanations. Good job man!
Hi! thanks for the video! Have one question though, I remember some manufacturer are making different sized of turbos for the L4 engines, smaller turbos are activated at lower RPM and the larger one is activated at higher RPM. Am I correct?
Another great video as usual.
can you do a video explaining the fuse box and what it does
Thanks for the info. Now,m on the upcoming F8x M3/M4 if the car is in Sports+ mode the turbines remaining spinning at all time. Did should eliminate all turbo lag right?
Great explaining, in detail with good example of engine diagrams..!!
I love this channel. Can be easily understand 👍
Excellent job!
really a big thanks to you...you helped me clear my 2 semesters...
Great videos Thank you!!!
Your videos are really cool, and they explain things that i have been wondering about. Subscribed
Thanks for subscribing!
Great video 💯💯💯
Your picture has the bypass valve in the intake. In that case no flow path is available for that turbo therefore it won't do any work and the other will. They would both spool but only one would do work
Think you can do a video on compound charger "turbo/roots" setups? I'm interested in the pros and cons on this setup for when I manage to get my own car.
You know so much about every component in a car!! Your videos are so easy to understand! Thanks!
You're very welcome, thanks for watching!
Great video, very informative. Ty
great video :) by the way your drawings are getting better
Awesome videos, you should do some stuff on turbos and superchargers in planes, explaining groundboosting, altitude boosting, and even the difference between turboprops and jets. :D
Good stuff, thank you.
Great work bro
Finally... coming back to what matters!!! :) don't get me wrong I love all your videos. But I want to see performance explanations.
Thanks!!!
Do you have a video explaining the numbers behind the power? I have a friend who doesn't quite understand the math for how each psi adds power in a linear way(best case scenario).
the bypass valve in the seq. twin trbo is not stopping the exhaust(partially) frm the engine to go into one of the 2 trbos...so hows it helping in low rpms?could u explain pls!!
does the bypass valve operate only when certain pressure is sensed?.... how would it know when to being spooling the second turbo?
Hey talking about exhaust stuff I was told that two exhaust are valid for "V" because of more than one cylinder bank, so on I-4 engines when two exhausts are applied the loose back pressure eventually losing power... Is that true? Is there an explanation for using two exhausts depending on something? Thank you so much... I love these videos!
you have just helped me figure out how sequential turbos work on 4 cylinder. sweet diagram and explanation process.
Thanks!
I want to twin turbo my m20 2.7 straight 6 any help advice is much appreciated thank you
I'm wondering about the placement of the bypass valve on the sequential setup, it seems like it doesn't block 2nd turbo spooling at any time, which would be lost energy on low rpms
Very good video and easy to understand but one question how to the valves know when to open and when to shut also is it a quick open or gradually open ?
great cant wait for the other video
Amazing videos 👐👐❤
My native language is not english but this simple explanation is the best under 5 mins, and even I understood the whole thing how its working. :)
If someone could please answer this, Like jason sir explained in this video about the twin sequential turbo at high rpm activates the bypass valve to run both turbos. How is that bypass valve actuated?
hi. just a quick question. does installing turbos or superchargers increase the amount of fuel being used per rev?
@engineeringexplained can you have a roots supercharger and turbo parallel in the same car?
I have a question . How can I check if the my twin turbo is pararell or sequential? Do I have to open up the engine and check or if you know it would be great! My car is a bmw 640d Gran Coupe '14
Hi, i understand the setup of the sequential setup, i just dont understand these valves? whats if the valve is closer to turbo than the turbo that has no valve? then no turbo will work? guess its just down to the maker to put the valve in the correct place? any help and advice would be much appreciated. Thanks!
but say you had a petroleum fueal engine say v8 injection eg could you have one 88mm turbo and a smaller say 40/50 mm sorta size turbo but had no bypass system would the smaller turbo over spin? bear in mind that the two turbos would be be completely independent? im not sure if it work?
Will it increase mileage if you don't want a power boost like in fords setup
So would there be a valve to split the exhaust between the cylinders and turbos in high rpms with the sequential setup? So does it requires two valves to direct the exhaust in the sequential setup because one is already needed to prevent exhaust flowing to the 2nd turbo in low rpms.
thank you coz share your knowledge. 👍👍
Would the bypass valve not be on the exhaust system to direct flow to just one turbo on the sequential set up rather than the intake system as on the diagram? Useless I’m missing a bit of information. Thank you.
hi i'm from morooco and i have a bmw 318is 4 cylindre and i want to know if i add a turbo or a twin turbo the engine would take it or it gonna blow off thank's for the answers and sorry for my english..
So if you eliminated the bypass valve on the cold side of the turbo, would you have a twin parallel setup?
Can i make two manifolds for sequential so two cylinder per turbine would it be okey for engine and turbos to work
Engineering Explained Could you please cover compound turbo setups? There seems to a lot of debate about their setup and performance use in gasoline engines. I'd love to hear your take on them and about how compounded pressure ratios affect performance.
Is the intake valve in the sequential turbo being controlled electronically, like a solenoid? Or more mechanical, like a spring-based valve?
Awesome video! One thing I don't get though is how having a bypass valve on the intake side of the "higher RPM" turbo stops the exhaust from going through this turbo. Like how do the exhaust gasses know to avoid this turbo when the bypass valve is closed?
I believe I can hazard a guess here. When the bypass valve is closed, it will block air going through into the intake manifold from the turbo on that side. That causes a strong backpressure against the compressor of the turbo, which makes it difficult to spin that compressor very fast.
Because the compressor is hard to turn, it also stops the turbine side from turning, which inhibits the exhaust flow through the turbine, resulting in a much higher resistance. As is characteristic of any system like this, the exhaust flow will take the path of least resistance, i.e. it will head towards the uninhibited side until that side gets so clogged with exhaust that its backpressure equals that of the inhibited side. If the pipe is correctly sized, and of course it is, such a situation will never happen until the RPMs get high enough that the bypass valve is opened and the other turbo becomes available.
Of course, the blocked side still turns a bit, and a small fraction of the exhaust likely leaks through the turbo vanes on the blocked side, but the speed and leakage is so miniscule as to not be relevant to the operation of the engine.
so is the sequential turbo, like the turbos in Subaru Legacy B4?
great video as always! what is the difference between bi turbo and twin? same thing?
i have a question for u sir.what if a person going a smooth road with sequential turbocharger installed; finds a turn or some obstacle so applies brake hence lowering the rpm leading to immediate valve closure on one of the compressor side hence leading to surge like effect on the turbocharger (somewhat like exhaust braking but at very high rpms) can cause a great disaster to the blades of turbocharger so instead putting valve on intake side ain't it be possible to place the valve on exhaust side of one turbocharger so that this problem is mitigated and even the desired logic of switching both the compressors 'ON' only at high rpms is also sustained.
is there a better set up? wich is the best wtwin turbo or biturbo?
Thank you for this video now I will be the 1st owner to twin turbo my car.
hi im building bmw m43b19 4cyl and im doing twin turbo one small to3 turbo and gt3071r how does this setup work ? i need help with that i dont know how to make that setup
on the sequential turbo setup what would keep the turbo that has not spooled up from becoming a boost leak?
I have a twin turbo supra setup. And its currently running in seq mode. However i can just reroute a few vacuum lines& vsvs and run in parallel. However. In seq. Mode its already more lag than i like. And thats for when the 1st comes online and even the second. Its far worse if i run in parallel but kicks harder obviosly my question to you is. Do u know if i could modify perhaps how early turbo 2 comes online and maybe even turbo 1. By perhaps modifying bypass valve? Btw. I have elec boost control and ecumaster det3. And i already have a borg single set aside . but for now im trying to have a lil more fun with the twins. Thanks for any input!
is there any advantage to a sequential set up when compared to a variable geometry turbo
Where could I find out more about this bypass valve? Would this also apply to let's say a 2000hp twin turbo 2jz?
2jz come stock twin turbo (i think)but ppl always sigle turbo them
is there any valve on 2nd turbine exhaust line to prevent wastage of exh gas flowing to turbine which is not in use.Also we can use one single larger T/C why use two which would increase maintenance and occupy more space and piping is very complicated.
Would you make a video on methane injection id really like to know how it works
On a twin turbo could you have a small turbo on one side to reduce lag and a bigger turbo on the other side to make more power when you get more exhaust into it?
if i hear you right you're talking like a precharger and yeah a small turbo with high exhaust can cause constant boost which is good and bad its bad because theirs always forced air but good for gas mileage and boost you pretty much are going to reduce turbo lag this way just look it up i mean its expensive and people usually just go single turbo for the pain or a real twin but its not unknown,
How about the legacy B4 RSK's 2 stage twin turbo what set up is that?
if we speak about efficiency in terms of exhuast flow. would it be more efficient (on a 4 cylinder ) to run 2 exhuast ports per turbo or the way you have just explained....... what are also the pros and cons of run it 2 ports per turbo
You are the man
would it be possible to twin turbo a car with two different size turbos and different boost so you can use one to get off a stop faster and one to help in to top speed end I'm a noob and wanted to know
Hey I have a question but I don't understand it tho . sequencial turbo are like high mounted twins that are parallel? For example the 2j or an RB.
On the second example I believe the valve to stop boost would be in the exhaust side before the 1st turbo
The 1977 Panther 6 had twin turbos, my fav supercar ever.
Hi, i would like to ask, can you make a twin turbo draw thru carburetor, please
Does the bypass valve shut down boosted air? I see it's after the air has been charged, before it hits the intercooler. Dump valve? Thanks
I think the idea is that when the bypass valve is closed, compressor will stall, which will block the flow of exhaust gas through the turbine.
Edit: many (all?) systems use a valve in the exhaust too that blocks flow to the turbine.
Would it be possible to make a videao about Quad turbocharging?
How does a Quad- turbo work on a Buggati Veyron then? Since it's a W-16, Is there an exhaust manifold for 4 cylinders then flow into the turbo to create boost then leave the car? Or is there another way that it would work?
my question is can I set specific specs to engage each turbo like as in Dont kick on until i hit X gear X RPM X Throttle X Exhaust...??
If the sequential have 2 exhaust, how it works ? Still the same or no. Thanks
Any reference material where I can get detailed info about twin turbo?
Random question. The bypass valve, is that an actuator controlled by the ecu, or does the secondary turbo activate it by pressure differential? ... Or i suppose you could have mechanically connected in some way as well ?
I would guess you would want to control it by ECU, though there would be numerous ways of doing it.
If you include a bit about dual scroll turbos with the next video that would be pretty sweet :)
If you were to install twin turbochargers on a 1975 914/6 a perfer the Parallel setup, but what size would the engine be able to push?
So how would the nomenclature work , I always thought twin turbo was parallel and bi-turbo was sequential?
what are your thoughts of a single T3 to4e turbo on a V6 engine?
How long can you travel with tubo and twin turbo charged cars?
could you do the advantages of remote turbo systems?
Can someone let me know how exactly the bypass valve knows when to open or close. Thanks
Someone please answer me this.. On a twin turbo set up, does the air intake to both turbos need to be the same length or is that not relevant? I am thinking down the line of 1 turbo (shorter intake) scavenging air from the second? Fairly uneducated guess sorry