How Porsche Perfected Intake Manifolds
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- Опубликовано: 27 июл 2024
- When Porsche designs an intake manifold, they do things differently. While most car companies try to increase pressure of air entering an engine, Porsche tries to expand that air. Here's how it works.
Intake manifolds can be designed with certain length runners in order to be tuned to produce peak horsepower at a specific RPM. The idea is that when the intake valve closes, the air rushing into the engine is force to build in pressure in the intake port. This pressure wave wants to equalize, so it bounces back and forth in the intake manifold. If you time the valve openings correctly, you can have that high pressure air force its way into the engine, making more horsepower and more torque. But Porsche does something completely different, instead of increasing the pressure of the air going into the engine, they try to expand the air. The video explains why Porsche's method is so effective, and how it reduces brake specific fuel consumption (BSFC).
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Hope everyone's having a wonderful day! If you find yourself suddenly curious about intake manifolds, here are some great additional videos!
How ITBs Work (Individual Throttle Bodies) - ruclips.net/video/uS3yHPfT9I8/видео.html
How Intake Manifold Tuning Works - ruclips.net/video/FaYIHQGU00k/видео.html
The Basics Of Intake Manifolds - ruclips.net/video/oMjAtDGdWRM/видео.html
How The LaFerrari Intake Manifold Works - ruclips.net/video/I_bOGqeHYlM/видео.html
Engineering Explained muito bom!! Manda uma alô pro Brasil!!
I'm, hope the same for you, and thanks for the additional info and the video, I find myself very curious about intake and exhaust and so on 👍🏻🤓 and very clever done by Porsche 👍🏻
Just one question from where do you get these data?
My mechanical background is not great at all so here is my question:
You mentioned due to the expansion areas within the intake manifold that provides air cooling capabilities but must be turbocharged, what models within the Porsche lineup would use this type of design? I'm assuming only the turbocharged models but figured I'd ask the question. Thanks for the information!!! Keep up the good work!!!
Your new big whiteboard is amazing
It's not about the size of your whiteboard, but instead is about the content of the marks upon it.
Such a deep comment
I had to like the video because the comment lol. Also great video but nice ending
Totally cosmic. Wow.
and his drawing skills....
Not to mention how the camera is perfectly straight and perpendicular to the board. Quite satisfying.
Surely the size of your whiteboard is proportional to the awesomeness of your channel!
So very kind haha. :)
"Now let's look at this graph of a baseline channel's awesomeness versus whiteboard size. In blue here, we have @Engineering Explained showing a 25% increase in viewer specific formula consumption (VSFC)."
Ben, You know how I know you're gay? Because of this comment.
Nerds! Lol.
@@dantetrejo4680 stfu border jumper
Nice, I see you increased the displacement of your whiteboard, I bet its performance is quite a bit better now!
Thanks for the like, @Engineering Explained I *love* your channel, have for a long time. Keep up the fantastic work! :)
I honestly thought this intake manifold expansion would bring about 2° to 3°C cooling. However your drawing on the board clearly shows a reduction of 20°C. That is simply stunning, considering the engine block is still so hot.
I tried to expand mine and blew the welds on the intake
Gallo 12 or 24? 24 seems to hold boost better.
So funny
Ha ha ha F&F jokes still works. Nice
The welds couldnt handle Vtec!!
F&F are still some of my favorite movies to watch... Don't watch them for the accuracy of information, just for the joy of it. After all I don't watch Anime because it is factual, it's all about the fan service :P
Engineering is so awsome.
Agreed! People are awesome (a lot of the times, sometimes).
Yes. Love it. Wish it was pushed more in the US education system.
It’s amazing how cars are designed and built these days! I am an old fart so I can appreciate how different they are. Thanks for a really interesting and informing video, Jason.
Its not all rainbows and unicorns. Almost every single manufacturer out there is trying to build their vehicles in a way they will fall apart after 3-4 years of driving, so people have to keep buying new ones. They make components that wear out quicker and electronics that fry and self destruct quicker to the point where buying a new car becomes more sensible since it becomes too expensive to maintain a 4 year old one. All german brands including Merc, BMW, Audi and porsche are doing it. Hondas are not that great nowadays either with their automatic transmissions becoming worse by the generation. So far I haven't seen very little evidence of toyota doing the same but I'm not 100% sure. If they make vehicles that last 15-25 years, they are hurting their own sales and bottomline.
Naveen Kumar
Naveen, I don’t think your premise holds up when you look at the statistics. Overall, cars are lasting longer than ever, with the Asians, of course, leading the way. America is second, and the Europeans, the group you specifically mentioned, are the worst. Still, I think it’s a bit cynical to think that they’re trying to build lousy cars. Anybody who did something so foolish would simply get killed by the Asian manufacturers!
I also have to take exception to your throwing Porsche in with Mercedes and BMW regarding reliability. I don’t know a lot about their SUVs and their passenger cars, but I know the 911 still has a reputation as being one of the most reliable sports cars money can buy.
I somehow agree with naveen but not to the whole extent. Manufactures are not making their profit from selling you cars, but instead selling you warranty and servicing your vehicle. Part prices and labour have sky rocket recently and most manufacture knows the trend of DIY individuals are growing fast. Hence this is why most cars have a very sophisticated electronics so only the dealer can trouble shoot which is where their profits are mostly from.
Congrats on the new white board! I guess it only takes 2 million subscribers to upgrade lol
Edited for 2mil!!
Danny Daskalakis make that 2
once it hits 4 million subs he will use a wide Blackboard and chalk to illustrate hehehe
Edit 3 mill now
Thoughtfully explained. I found this very interesting, I had no idea! I am also impressed that you went over six minutes in a single take. Thanks for posting!
Ha, thanks! :)
@@EngineeringExplained I'm at a loss for understanding why this last minute expansion in the intake manifold is better than say, using a larger intercooler farther upstream?
I've worked on a lot of Porsche cars and this answered the questions I had for their strange "log" manifolds. it makes sense, cooler air is denser, also tuning, while important is not the only factor. Of all the european cars i worked on, I've found Porsche's to be very solid, reliable and easily serviced, with older mercedes not far behind.
Awesome content, I like how you are going into the technical aspects of cars and their inner workings. Also the additional links you provide to such special topics, as this one, are incredibly interesting. Keep it up!!
Thanks, glad you enjoyed it! 😁
I just want to say that it is amazing how your style changed over the last few months! Not that you were bad before but you seem more comfortable in front of the camera! Your quality of explaining complex topics in a simple and entertaining manner is still as great as it was before, lets strive for the 3 million! ;)
Porsche engineers are some of the best in the world.
Facts ! People are just haters to say otherwise.
No doubt.
People will find A way to ruin it with A cold air intake or something like that.
@Ismael Reynoso Jr it's still a Volkswagen it's gonna have problems
@Ismael Reynoso Jr you must be unfamiliar that Porsche is the most dominative manufacture in motorsports. With the 911 being the most dominative production car name plate. Although The bmw e30 m3 as a single generation model car has the record for most races won.
It's very cool what Porsche is doing. After watching all these engineering breakthroughs made by them, I no longer wonder why their cars are so damn good.
They don't waste money on styling, more engineering money.
Just don't wreck it or you will probably die. Way too fast not enough structural integrity. Kinetic bomb.
@@tcroft2165 Its not the placement of the engine that wrong. Its the driver who doesn't know how to operate a rear engine vehicle.
Wouldn't a bigger intercooler accomplish basically the same thing? Without sacrificing the pressure boost from the induction intake?
Hot air accelerates due to "low pressure". Larger manifold would instead increase the pressure.
Even as an engineer, I never cease to be amazed by your content
I'm an older guy that got out of the dealership and Automotive business in 1991 I still enjoy working on hot rods however, learning about some of this newer technology is really interesting to me and the professional way in which you conduct yourself in your Channel is easy to watch and understand I hope you go far in life doing whatever you want to do it seems you have a great start
best wishes...
The mechanical science of the combustion engine is a beautiful thing 😭 i think it would be nice to see a future video on how would people make electric cars faster and what possible future mods would look like.
As usual a very concise and easy to understand explanation of Porsche's technology and how it differs from traditional intakes. Your videos are a joy to watch Jason, and you have even responded to me a couple times which makes me feel all warm and fuzzy!
These people are brilliant!
Thanks for sharing. It's amazing how much the _seemingly small_ things make such a quantifiable difference.
Wow, that explanation takes a lot of work..thanks.
People go to school for 2 years for the stuff I learn from an 8 minute RUclips video
😂😂
@@EngineeringExplained Why are various degrees not offered through RUclips?
@@Michael-fw5ef right now you can only get flat earth degree, anti vax degree, chem trails degree, and alien/world govt degree but theyre looking to expand
Awesome video Jason! Porsche has always been my favorite auto manufacturer. If you ever plan on continuing your best engine series, I would strongly suggest you look at the v8 in the 918 spyder. 4.6l producing over 600 hp NA.
You left out the most impressive part, it weighs 135 kilos, which is less than a ka24de four cylinder
I was looking for this explanation, regarding the Porsche air intake manifold, for long! As usually, you rock! 😉
I also like, that you are thinking always in terms of improving the things, in general, like the way that you wrote on your "big white board"!
Lots of appreciation, from Romania!!! 🇷🇴
Congrats on the 2M subscribers!
I am not even that much into cars but this dude explains so well it's pleasure to watch and just understand stuff
Congrats on 2 MILLION subscribers! Well earned and one of my favorite channels. Keep it up EE
Congrats on 2M!
Can I just say, your awesome I’m digging this unbiased information based channel you got, I’m learning a lot from these videos. Next time I got some spare change I think I’m grabbing some gear. Thanks man.
I'm so glad I discovered this channel. This fella explains stuff so well that even a Cro-man like me can understand it.
So happy to hear it, and thank you so much for watching! :)
Yaaay! Now my Sunday is perfect - another fascinating video from Jason!
Been here since the beginning, i'm proud of you, keep it up.
Excellent! I wish I could give this one so much more than just a thumbs up.
It was the graphs comparing air pressure vs time that put this one over the top. That gave a better intuitive understanding for these manifold tuning methods. (well that and of course the BIG WHITEBOARD...board...board...board...)
Congrats on 2 million subs!! 🍻
I feel like your a teacher I enjoy learning from. I look forward to coming to class everyday keep the videos coming!
Thanks for your excellent attendance!
One of your better videos. Well researched and good engineering. 👍
Happy to hear it, thanks for watching! :)
Peugeot had a plenum built into their 404 and 504 cylinder heads. On the 404 here was a short, single throated manifold from a single barrel carb that was watercooled. The ports to each cylinder were cast into the head for a few inches. These heads were very wide in order to accomodate the fournals. This allowed for very uniform temperature regulation of the fuel. It worked out to be very efficient. So, for instance, their 2400 lb 404 sedan would easily get 30 mpg from a 1600cc motor was reasonably peppy and could go 100mph.
Big congrats on 2 mil subscribers, well earned.
That’s my engine on the thumbnail!! Omg so proud
Thank you for the video!
GREAT VIDEO! Absolutely love how you explain it all and make sense of it. I always knew that playing with intake shapes would help in some ways. Glad my mental hypothesis have been proven right! I also said that small boosted displacement engines would be popular and they are! Anyways, rambling here, Thank you for what you do. Keep it up brother!
Congrats on 2 mil subs! Keep up the quality content! 👍
8:42 Jason's new dance move!
The big white board makes the image more "calm" to look at because there are no edges. I like it.
Man, this makes me want to redesign the subaru intake to reflect this expansion style. I have been working on modifying my older 96 subaru legacy to be more fuel efficient. 12% is a huge savings.
@@jackpoage5419 This was noted. However, the lower temp, and decrease in knock are also valuable. The improvements are still quite good.
is it just me, or??? That's the only guy who actually *explains* car science. Brilliant.
By the way, great video. This is much like the pressure waves used in 2 stroke exhaust systems.
I swapped the clever oem intake on my old mazda for an aluminum one. It was way lighter, but my favorite part was it had perfect resonance at 5000 rpm. Them pressure waves of the valves closing went right back into the cylinder to shove you back in the seat, and it made the most beautiful roar! Of course, I enjoyed the heck out of those 130 torques and 150 horses. So now I drive a truck with 150 torques and 130 horses. I haven't gotten into near as much trouble now, but it just doesn't sound the same.
I was totally thinking that white board was a lot bigger! I'm glad I wasn't late to notice. Keep up the great videos!
YAAAAAY! EE is back with dad jokes and more cool engineering stuff ^^ Love this channel
Haha, thanks!
I was surprised you said this method is counter intuitive. To me it’s fully intuitive. Expanding air or water tubes/pipes always improves efficiency. This is a pretty fundamental engineering principle. 😀
Well, air is not like goose down. You can’t easily cram it. A basic principle of dynamics is larger airways create higher pressure. Ask anyone who installs HVAC ducting for example.
nearing 2m subscribers!!! keep it up and congratulate you in advance❤️❤️❤️
I watch in 4K ! And I appreciate it a bunch! Thanks
This video is interesting, much improved. I like this more than the "entry level" science you used to do. It's what we all want!
It’s amazing how much knowledge you have on cars!
For the first time I understood everything you said, I must be an engineer now :-) thanks for the videos :-)
Fantastic video. Another very interesting intake manifold to research was the Mazda VRIS system employed in the early 90's which had three controlled resonance modes. Thank you for another great video!
Always enjoy listening to your theory sessions. Been in love with cars at a very young age and always looking to learn about the new technology and innovations. Very inspiring with or without the giant board. haha
amazing that such a simple looking design change can yield such results
Always great content
congrats on your 2 million subs! great video as always.
Another Great video, EE! You are an Excellent teacher.
Thanks Mark!
You broke it down to a level that I can understand and I appreciate it
Thanks for the giant high quality whiteboard! Sincerely, crazy guy who uses a 43" 4K TV as a monitor.
Great informative and educational video As Always and thanks for the “bigger” white screen. It’s awesome.
Great content, and congrats on 2 million subs :)
As a refrigeration mechanic this topic has been extremely interesting. I myself have been wondering for a while why manufacturers/engineers dont design force induction engines to use a restriction control instead of a wast gate or relief valve to regulate the pressure. They could easily turn the intercooler into a condenser and create sufficiently colder air temp at the same intake pressure. I guess porsche are half way there congrats to them.
First thing I thought was that you now a new white board, which is bigger, but you're standing in front of half of it! Anyway. No complaints from a 27 inch monitor! (1440p) Keep up the awesome videos!
You're very good at explaining 'potentially explosive' material!!! Seriously you are easy to understand which makes your content similar to 'streetable HP'!-) ✌️🖖🔥
That new whiteboard is excellent for reviewing trucks ;-)
I have been follo wing you for some time, your white board videos are great. You will be a great teacher. You understand what you are tanking about and do it with passion and skill. Well done.
Similar to the history guy channel. What a school we could bring together.
Thanksgiving I am grateful for the technology inside my Porsche! ;D
Damn I lol'd at the end hahahaha Also, very cool video!
Briliant as always.
Keep up the great work! Great to see engineering being explained to people!
Thank you!
Good illustrations and depth of explanation good job on videos
As always, great video, I always watch on a big screen :-)
They merely medicated the effects of reversion. Chrysler did almost identical thing in 1964 with their NASCAR intake that operated at 104% +. And when air is cooling it's Contracting, not expanding. But it is more dense and the expansion chamber and the short Runner means there's more available air to go into the intake when it's not under the effects of reversion. You're going a long way around the barn 2 explain a really simple fix that I've built in a sheet metal shop in the span of about half an hour in intake systems.
Not entirely correct: two laws; Boyle's law, the one about pressure, volume and temperature interdependence and also Bernoulli's law about cross section pressure and speed: So what is missing in this video is that when you increase the cross section of the piping speed slows down but pressure increases, quite the opposite of what is explained in this video. A traditional trumpet intake is like the nozzle on a fire hose, widest at the start where the hose connects and pressure is highest and narrow at the business end where pressure is zero but speed is high. The reason this is used on NA engines is because you want high speed air going through the valve helping with mixing, not to increase pressure, it actually reduces it. So going the other way, expanding the cross section, you slow down the air, but increases its pressure, and temperature! However I don't think neither Porsche or our friend got this wrong, so what is explained in this video (which is also mentioned) is for a specific rpm and load where the pulses from the valves actually go into a resonance with the chamber , so that the combined effect makes pressure drop in the wide section of the manifold! Just think about a turbocharger: The impeller does not make pressure, it increases the speed of the air as it leaves the circumference of the blades. Turbo pressure first happens when that air is slowed down in the annul around the turbo. This is why we have turbo surging when the flow is too small, no acceleration of air is possible and the impeller just becomes a solid mass of rotating air, doing nothing.
Kudos on the white board. I'd be interested to see aftermarket manifolds for inline 4-cylinder boosted engines use that method. Talk about a tight fit!
Amazing and I was able to keep up with the lessons. Like always Thanks for a great video .😉
So cool - well explained
And you perfected the relative size of your white board to the screen, that's pretty cool too!
U have to be the most knowledgeable automotive You tuber out there and very good explaining some complicated Systems always love watching your videos 👍
What an awesome technology of porsche and Jason is even more awesome for explaining it once again.
Very good explanation, as always.👍👍
Love that new whiteboard 🔥
Great new board!
That is super interesting and one reason I like the P-car brand so much! Have you checked out the Vario-Ram that was used on the second gen 993s? Pretty cool system, but this is even cooler with no moving parts! Love the new white board! F
Will have to check out the Vario-Ram!
I thought it was like vtec. Or that’s something I read off Wikipedia on vtec by Porsche way
Jason did a video on Vtec which I believe is Honda's variable valve timing technology. Porsche has something similar starting in the early 2000s with the 996/997, but the vario ram is an adjustable intake geometry that is designed to give better mid throttle response. It was only found in the second gen OBDII engines. Interesting system...
Maaaaaan this was a very simple and cool video! I really enjoyed it tnx for this...
I also love Porsche brand and especially their 911 GT3 RS models 💙
2 million! Congrats
2 million subs soon!
YES 2,001,659!
Nice new white boatd! Great video
2 million subs!!! Congratulations man 👍
Oh and i like your whiteboard 2.0 😀
@EngineeringExplained The Best Teacher i know😆😆😆
Awesome video
Great explanation as always. Thanks! 👍
when content is not at 60fps i can watch it up at 1440p no problems so bring on those jam packed witheboard videos
oooh, now i get it! they use more psi, so they have even hotter air. that means a bigger difference in the intercooler. that makes it take even more energy out of the air, and when it expands it cool downs even further! awesome!
4K master race :D
FULL SCREEN WHITEBOARD IS OP OP OP :D I know them things are $$$ but it's money well spent for your channel
I love your video's ! Please keep up the good work !
SBF