Why Exhausts Make So Much Power😵| Explained Ep.27 

This is my favorite part to upgrade on a Tesla

As an Automobile Engineer myself. This channel is suppose to be recommended for Engineering Colleges because you can't get any material that simplifies as this channel. Shout out to this channel.

Damn it's amazing how much engineering knowledge goes into an exhaust system these days

This guy's videos are always so well done....great channel.

The amount of detailed information in these videos are amazing.

Idk how he doesn't have a million followers. The videos are so well and cleanly explained with great visuals for dumbbies like me. Thanks for your hard work! Look forward to your next upload

Dude you're my hero for putting in sound comparisons with the exhaust mods and piping configs!!!! And choosing such pleasant beefy exhausts made me smile ear to ear

LET AN ENGINE BREATH

Never seen a better video on exhausts. So much to them. Never knew that.

This is some history channel level quality here. Could easily be a show on TV. Extremely well done

Quick short bullet point list for basic header fabrication (kinda): 1) forced induction builds: Based on metallurgical properties, Inconel is the best tubing to work with, but expensive and not as easy to weld correctly. High strength with low thickness, greatest resistance to high-temperature softening, and can handle structural integrity loads that T304 SS and Ti headers can't. 2) Collector convergent and divergent angle-of-attack: On both sides, the more gradual (closer to 0 degrees), the more powerful they are, at the cost of being less compact. Common convergent and divergent angles are as follows. Convergent: 12°, 15°, 20°, 25°. Divergent: 13°, 7°, 3°. 3) In engines that are 1) not even-firing (crossplane V8's, odd-firing V10's, 2009-current Yamaha R1), and 2) share a common intake manifold/plenum, the absolute best way to determine individual ideal primary header lengths is by comparing exhaust pressures between individual exhaust runners and comparing them as % of each other, starting with the highest. Highest pressure value primaries stay at pre-calculated length. All others get length reduced by same percentage as pressure (e.g. for ideal length of 38 inches, exhaust pressure of 92% max gets 92% total primary length, which is ~35 inches). 4) for engines such as V-twins with large firing order intevals, there are 2 priorities for consideration prior to fabrication: 1) Pressure percentage as listed above, and 2) firing interval (in degrees). Example: Ducati 90° V-twin firing order/interval is 270°-540°. Cylinder with 270° interval gets unchanged ideal primary length. Cylinder with 540° interval gets ((540÷270) X Ideal length), then adjusted for pressure percentage as stated above. If higher than cylinder 1, add percentage length. If lower, subtract percentage length.

There is an intangible and indescribable sensation that the exhaust notes from a well-tuned internal combustion engine delivers to the driver. Let's find a way to keep that visceral car-driver engagement alive forever!

My car isn’t the only thing getting straight piped today

This channel consistently puts out great content. I don’t have any recommendations for new video content, I just wanted to give credit where it is due and thank you for producing such informative and quality content without losing the entertainment factor. Well done sir. This is my second favorite channel behind ole’ Cleeter.

im blown away by the production value. this is a top notch educational video that should be shown in schools. holy crap!

Would’ve loved to have this guy as a teacher in HS…bring these type of classes and programs back to public schools

I used this video as a reference to set up my entire exhaust system The stock exhaust size was 1.75 Upgrades: Trd 7afe 4-2-1 headers Stock cat (I live in California) 2.5 exhaust piping after cat 2 bullet resonators for no drone And a Fujitsubo Legalis r muffler Sounds pleasant to the ears ❤

Just want to let you know that you're appreciated brother. This is top tier content, and always instant-watch when it shows up on my feed. Thank you for doing what you do!

i was searching on "why i'm exhausted" and this popped up, no wonder i was so fired up now

WOW! What an enormous amount of information in such a short video. Awesome! I had to stop in the middle and go back several times to pick up the information. Such professionalism in this video, I would have thought that this was a car show on television. I have seen a couple of your other videos but it was this one that made me subscribe to your channel. WOW!

This is one of the best exhaust videos Ive ever seen. You actually show how the different parts effect the sound. You have the math and examples right there for everyone to use and explained it very well! Please do a followup including how runner length effects savaging, and a little detail on how to achieve particular sounds like low rumble vs screaming. That is all thats missing from this being an extremely valuable tool for DIY guys to make godly exhaust systems.

Your videos are straight to the point, and give the viewer exactly what they came for! I love your videos! Keep it up!

This channel is criminally underrated

This is a superb production. Love the science, engineering, visuals (CAD and incredible renders), subtle bass sound effects, crisp narration, pace of content flow. Bravo. Way to bring it all together on a fun topic. Subscribing.

The best and most informative videos on engines on the Tube! Keep ‘em coming!🔥🔥

i'm in the minute 6:42 and a had to stop to congratulate you because of your amazing work, really. I'm amazed of the quality of your video. congratulations nad thanks for letting me learn this old question i had for a long time

one of the most detailed and comprehensive videos i've seen about exhaust systems. well done!

The amount of detailed information in these videos are amazing.. This guy's videos are always so well done....great channel..

Once again, very well done with useful, helpful information. You are a treasure to the automotive enthusiast community! Keep the good videos coming dude!👍

Dude.. so clear so concise. Even if you already knew everything covered the edit is so choice it’s worth watching. Sharing with my friends now. Keep up the great work man.

Man, your the channel that explains back pressure in context with a video instead of just saying “pressure recycles backwards”

Love seeing the progress of your content. This is my favorite video yet! Excited to see what is coming next!

i see you used our Diagrams in your valved exhaust section! Fantastic video as always 🤘

once again with the banger of a video ! Keep up the work bro we all support you

Great explanations and visuals combined. An absolute gem.

Masterfully done and extremely well-produced video.

I have been doing this sort of thing (apparently, quite poorly) for nearly 35 years, and I had *never* heard of a J-pipe resonator. Having taken a class in the physics of acoustics *way* back in my undergrad years, it makes... enlightening amounts of sense. I thank you for this incredible contribution to my knowledge base, and I will undoubtedly be using this info on my next exhaust build. Like, it's *so obvious* I can't believe I'd never seen this before, as it seems like it has an incredible potential to reduce irritating sounds on a muscle-car cherry-bomb style exhaust. Mad props, my friend.

So thankful I stumbled across the channel, incredible content for us car enthusiasts. Been sharing this with all my car friends, I'm looking forward to seeing this channel at the top in the near future. Can't wait for the next video.

Do some videos on brakes, pads, rotors, the fluid, all of it please. What you can or cannot upgrade. Same with AC systems, I've always wondered if you can get a better AC compressor or anything to increase cooling on the systems.

Great video, thanks for sharing! In previous videos you've shown and in some cases discussed camshaft specifications. So I'm hoping you eventually do a video that goes in depth with camshafts: centerline, duration, overlap, lift etc. Thanks and keep up the great work!

Again another perfect video! Not sure if turbos have been addressed before on this channel but would be interesting to see the relationship between big turbos, gear ratios and overall output and driveability. Large turbines Vs small turbines and how it all feeds together.

I just found this channel and I'm so excited to watch all these videos! Thank you!

These were the type of videos I was looking for, thank you 🙏

Great video, keep covering topics. Next I'd love to see the intake side of this topic, basically how modifying just intake or exhaust or both effects performance and what are the best possible outcomes when adding a power adder like turbo or supercharger. ❤

Great video, I feel like I learned more in 10 minutes than I have in the last 10 years. Exhausts are a staple of the car community and I love how you can transform the sound, character and power delivery of an engine just bey changing the exhaust. It's just a shame so many modern stock systems sound so dull because of regulation. And of course they want to push us all into EVs eventually so I guess one day exhaust systems will just be a historic curiosity. It will be a sad day indeed when that happens!

Dude!!! Haven’t watched your videos in forever and DAMN the quality is crazy on them! Such a massive knowledge dump you have to rewatch them just to catch everything. Love all the background content adding to what your saying, helps a lot with visualizing everything.

337 SPEED makes the best RU-vid titles! I’m on binge now!

The quality of the videos is just unbelievable. I wish they show these videos during Powertrain Engineering lectures. I also wanted to ask, could you maybe make a video on hydrogen ICEs by any chance?

This Brotha is My go to for Technical, informative, Entertaining precise Data on All things Internal Combustion. He is indeed #1 in professionalism and graphical data on youtube..Thank you for gifting us your knowledge and expertise my brother.

Excellent. Informative and well presented. Thanks.

As a car lover and mechanical engineering student... damn i found my favourite channel on youtube. Thank you so much, i really appreciate your work!

These videos are so well done to the point that I normally have very little to add. In this instance, exhaust systems from the flange to the first bend is actually an amazing dark art all itself. The length of the runner and even the shape is perhaps the most critical areas to absolutely nail for absolute power gains when fine tuning for maximum performance, as going too far in both dimension and diameter can literally suck power out of the combustion chamber. The role of backpressure, most notably in NA engines, plays a critical role with valve timing in maximizing power made during the power stroke as well as retaining the gases In the combustion chamber for the most complete combustion. How the exhaust pulse travels plays a large role in this as well, as it is both a measurable difference through CFD computation, but also acoustically. One of the more interesting things is that a fabricated exhaust can look great aesthetically, sound decent, but the pulses can kill power through reflective resonance in combination with poorly optimized geometry. Some folks will put on a nice-looking exhaust without the forethought of what is really required to get the most performance gain regardless of price, as even name brand systems will get you something in the butt dyno, but are far from optimized designs. As said, it is its own dark art that takes the right hand to craft a system while also ticking all the right boxes.

Dude you make some good stuff. Really nice starting point for getting people to look more in-depth on exhaust science.

Never watched this channel before! I love the clean and concise writing and editing and the builders perspective of this video! Makes car modding feel learnable and approachable!

Great video, very informative, short, and to the point. I don't know if you did the animations or hired someone, but they were perfect to illustrate the mechanics.

finally, somebody who shows the math for us to use as a rule of thumb

This dude makes amazingly in depth and well put together videos. Thanks bro

Enjoyed the video very much. Great job, keep up the phenomenal work.

Diesels are a good example of the importance of good exhaust systems. Look at modern trucks with DPF filters and how horrible the reliability becomes. However, a straight pipe will allow all that exhaust gas and soot to escape and it’s like a completely different experience. It seems like a small upgrade, but I was told by a mechanic to think of it as not being able to fart and how it makes you feel inside vs letting loose and feeling good 😂 It’s essentially a better ability to breathe and flow

Large diameter headers (particularly long tubes) generally do not make less torque than factory manifolds - in fact, in most applications, they add a huge amount of torque down low. I've seen this on the dyno countless times. Factory manifolds are almost never designed for scavenging - they're designed for durability, packaging and cost.

this guy is so so intelligent and educated on cars its insane

Man your videos are top notch 👍🏽

Awesome content and very well presented. Thanks for sharing this little Gem with us. Appreciate your time and effort in making this. Cheers from Motown.

Thank you so much for explaining these topics super clearly

Amazing video, super clear and good looking graphics. To the point, short and sweet, love it!

Wow. This video was amazing. The quality of the animation and the detailed explanation. Truly fantastic. Keep up the good work. Sub'd.

These animations are wild man! Helps to understand the concepts so much better.

Thank you for this video. This is by far the most informative and explanatory video I’ve seen on such information! The narration, background music, editing, and animation are perfect and make the video exceptionally easy to watch.

Man this video has so much work on it, i just discovered your channel and I'm impressed, we need videos like that

This is a gem of youtube. I like your presentation style and all the effort put into graphics design and soundtrack. Subscribed.

These videos are VERY well put together! Thank you for making them !

Absolute best channel out there for educational purposes

2nd video I've watched from you, and I say, it is so very well put together, and to the point! I don't have time to listen to someone drone on and on at unrelated information. This is very refreshing! Thank-you! 😃

This is one of my favorite RU-vid channels. Thank you for sharing your knowledge and passion of/for automotives & engineering. How you explain each topic you make a video on truly is unmatched in my opinion. I'm surprised you don't have more followers honestly You're content is always 👌💯🧠💭💡🤌

Very well done video. Lots of information to take in. Definitely need to watch it multiple times.

Great format. I really enjoyed it because i can do other stuff and listen. This was such a smooth vid i could still understand and pay attention to it while being pre occupied

Excellent video, stellar graphics and narration. Such a concise visual package that's clear and easy to understand. Great job!

Really great visuals to go along with the explanations behind it!

This is the most comprehensive and accurate video I have ever seen on the subject of tuned exhaust. Tuned intake is very similar as it works on the same basis principle of pressure waves. Hot Rod magazine did a publication in the1960s on this topic along with the mathematical equations to calculate the best tube length.

Outstanding quality, great video

Expertly made video. Great pace, great voice over, great info. Didn't know all this info this morning, now I do!

SUCH good content and commentary. I have enjoyed your videos before. Just became a new subscriber. All the information with no fluff or filler. Thank you!!

The amount of practical science in these videos and in these machines is FASCINATING!! My Nuclear Thermodynamics teacher will be very impressed with this!

Excellent video, this is the deeper dive for info i like, keep up the great work

I never knew about the scavenging effect during valve overlap, learned something new

This is a great video, nice job!

Great explanation and really interesting. Thanks for taking the time to make the video and share it.

This video is awesome! I learned a lot.

Great video, loved hearing the sound comparisons and finding out why.

Knew most of this, still watched every second. Extremely well put together and paced with tons of good information. Man I love cars lol.

This was a great video! Thanks!

This was so dope! Thanks for all of your hard work. I'm definitely subscribing.

A very great work sir.🎉

Great video! Depth of knowledge and animation. Highly quality stuff brother, keep it up! I’m a fan.

Sending this to every auto shop class teacher I know. Steve Rinella just started talking about automotive science. Super impressed. Keep this up.

The production quality is always on point my man 🔥🔥

Really love this channel and appreciate you making the vids you do man. Thank you.

Thank you for this explanation!

Your videos are the best on RU-vid. Make them about anything and I’ll watch.

and just like that Im loving car builds again. Thanks for all the knowledge!