Using the metric system in a video watched internationally. You're the real MVP.

@saratj1

8 жыл бұрын

Id be willing to wager that the overwhelming majority of the audience are more familiar with US customary units (had to look that up) and using a single system would have basically no effect on the channel. The US creates a disproportionate amount of the entertainment that the world watches and Im sure the world has adapted to watching content that caters to an american audience.

@The-Athenian

8 жыл бұрын

saratj1 If the percentage of countries using the imperial system was similar to the percentage of internet content created by the US, I would agree. I think ideally we should do as Wikipedia, and always try to use both. Even though the official IU is the metric system.

@patricknintemann924

7 жыл бұрын

it is good he uses the metric system too . i only know the metric system . when he would use another then i would have to calculate how much is that in the metric system . so , using both is easyer for all .

@SayWhaaaaaaaaaaaaaaaaaaaaaaat

7 жыл бұрын

MUCH more people uses metric, so... Also metric is better for videos and in measurment anyways no need decimals in many cases so integers are easier to remember

@GoodmanDontLai

7 жыл бұрын

For engineers, using the metric system is more often than not, an imperative.

I feel like an online student watching your vids, good job man

Dogback exhaust usally performs better.

@UCGhy34YYL0R3LirWIvhvxng

8 жыл бұрын

+Matthew D But catback produces a more pleasant sound - your car will purr like a cat.

@darinhumble4656

8 жыл бұрын

+B0NEZ and arch up into the air

@supernova4300

8 жыл бұрын

Haha yea cats suck

@supernova4300

8 жыл бұрын

+Michael F yea coz ur mom taught her well.

@galaxymode

8 жыл бұрын

Catback exhaust for catalytic converters, Dogback exhaust for dogalytic converters.

He's not saying it will increase the power to 225 hp. He was simply saying the bigger exhaust will allow enough airflow for an engine producing approximately 225 hp. So if you were to tune it then this exhaust will help airflow up to 225 hp.

@flow5718

5 жыл бұрын

That's a load of bull mate. How is changing just the catback part going to reduce bottleneck and increase airflow when you're still using the stock exhaust headers and catalytic converter and the pipe in between those two? Honestly, I think all a catback exhaust does (on its own without other exhaust manifold mods) is 'improve' the sound, and that's subjective.

@daexion

5 жыл бұрын

@@flow5718 Even with stock headers it's possible for the diameter of the catback piping to be a bottleneck and cause back pressure. If you don't have stock headers, then the next bottle neck would be the catback pipes. You are right on the sound of the exhaust itself being subjective, and increasing the potential amount of flow won't necessarily help if the engine is still stock as the video mentions.

@flow5718

5 жыл бұрын

@@daexion I don't have any links right now, but search for as many catback only mods with real dyno tests and you will see in most cases putting catback decreases the hp slightly. stock engines need a certain amount of backpressure.

@stayfrostie2583

4 жыл бұрын

@@flow5718 Do you even tune bro?

@carsonho9338

4 жыл бұрын

flow cat back is much longer travel than the header, it will help for sure when in high rev

It makes for good conversation in interviews. That's initially why I started this.

Indeed, I do need to install it some time!

I absolutely love these videos. Its great to be able to invest a quick 5 minutes or so in exchange for some solid, useful general mechanical knowledge. This guy is gonna make a great teacher one day

dude thank you... as an automotively oblivious person, this is the most I've ever understood out of any car tutorial video, your explanations are amazing and you're very concise, once again thank you

These "explained" videos are very very helpful! Thank you for taking the time to make these!

I love this channel. This channel is going to change my life

I LOVE how technical these videos are. I'm learning so much!

Glad to hear it, thanks for watching!

@T1000.Android

9 ай бұрын

Look at thr Mop on that head 😅

This guy gets sooo technical I love it

Well honestly all the bushings are probably shot, but what needs it the most is the rear trailing arm, and the tool for the fix is fairly expensive. Awesome that you've got the catback!

You taught me so much when I was in high school about 10 years back. I just now stumbled across your page again, the nostalgia. Thank you guy, you are one of my heroes who helped me (a female) get into cars when I had nobody to talk to about them. ❤

so many interesting videos, you're keeping me from my homework.

@EngineeringExplained

10 жыл бұрын

At least you're still learning. :)

@Spartan0917

5 жыл бұрын

Did you graduate

@rupert6478

2 жыл бұрын

Did you graduate

One detail that was not mentioned was the possibility for better MPG. I personally did a larger cat-back exhaust on a similar car (2000 Ford Escort ZX2) and without any big modifications I had gained around 2 or 3 MPG. Then, once I had the muffler replaced with an even better flowing one, I had gained another 2 MPG. This was noted directly after only doing that replacement, as I keep track of my MPG at most fill-ups.

I am indeed! Working on getting a garage so I can have some space for install videos - no promises on when I'm getting these done though haha.

Yes, that was one of the points I was going to discuss, however since this is much larger, it appears that it would weigh more. The Yonaka was about 29 lbs I believe, I haven't weighed the stock one.

Forgot to take off his helmet when making the video...

@luddakris5397

5 жыл бұрын

LOLS...

@ernestocayetano9495

5 жыл бұрын

Lmfao dude made my night

@wesleyrichardson2953

5 жыл бұрын

lol

@602katana

4 жыл бұрын

hehehe

@PavelIsp

4 жыл бұрын

It adds +200HP

I have that very exhaust and I love it. My Integra's exhaust was aging and full of holes. The Yonaka catback was inexpensive compared to replacing the OEM piping. The car sounds as the speaker describes. It's relatively quiet when you drive normally, but does get deep and loud when you increases the RPMs. It cleans up nice and I've not had any issues with it. Is there a performance benefit? Maybe, but I haven't noticed a difference.

Great question, and of course it depends on the current exhaust's restriction, and where the restriction lies. But if everything else is up to speed, for an engine like mine it may be good for about 10 hp, or maybe more if it was turbod.

I've got a few automotive engineering books I've borrowed from my university library for leisure reading... its great to see all the theoretical stuff I'm reading up in your videos :)

Great video! Just my two cents (coming from what I learned as an HVAC engineer and applying it to cars): I think you should have mentioned the fact that there are a lot of reasons why even if the exhaust system past the catalytic converter is the ONLY limiting factor in your setup, there are a lot of factors that go into why you still don't get a power increase that is one to one with the proportional increase in the pipe's interior cross sectional area - you could get higher or lower depending on your set-up. I realize that you presented a simple concept to show that the flow rate would increase as a result of the increased diameter, but in doing so you held a lot of the other variables equal that play a big role in the system. But I think if you had talked about turbulent versus laminar flow (using the Reynold's number) and mass flow rate, it would have explained a lot more. Namely: - Laminar or turbulent flow through the pipe (High Reynolds number>4000 = turbulent,

Thanks for teaching regular guys like me about car stuff.

Since so many years your videos are just Timeless and phenomenal.

I do, eventually. I will have videos for each install, and hopefully test videos outlining any benefits/changes.

I want to say thank you for your videos! Majority of the answers I search for your videos show. Thank you for what you do. Appreciated 🙌🏽🙏🏽

your videos really explained the topic really well, because of you i'm getting more interested in cars and engineering, well done!

@thatanimationboy

3 жыл бұрын

How are you doing 5 years later?

There is a lot more to performance exhaust systems (if done correctly) than just back pressure. A properly designed system will create a negative pressure wave in the headers to increase fuel scavenging on the intake stroke. while this is largely accomplished through proper header design, the rest of the system is key to proper header performance, including the amount of back pressure present. I know you know this, but it is not mentioned in the video at all. simply adding a cat back can actually result in less performance, unless the rest of the system is designed properly. Kevin Cameron has a great breakdown of exaust system engineering in The Sportbike Performance Handbook. Love your videos, BTW.

@flickerblip9044

8 жыл бұрын

forgot to add, the intake system design is also integral to the system. it is just an airpump in the end.

@lliaolsen728

8 жыл бұрын

+Brian Donegan I came to the realization that headers do most of the scavenging. You can get some benefit from the rest of the exhaust as well but the biggest and strongest "suction wave" or in your terms, "negative pressure wave" occurs when there is a large change in the diameter of the pipe. The length of the header determines when this wave will travel back, but not it's strength. This makes the collector or any large change in volume critical in providing a point at which there is a large change in volume from the primaries 4-1 or secondaries 4-2-1. The exhaust just efficiently removes the exhaust and really should be focused on flow. I have yet to have a car that could fit a muffler right after the collector to prove that the change in volume on a 4-2-1 right after the header would be beneficial because most 4 cylinder cars don't have space for a muffler there without ripping up the floor, or removing the engine and running it on a stand.

@lliaolsen728

8 жыл бұрын

+Llia Olsen If your info was taken from Motorcycles that have a much shorter exhaust run. You could really considered a muffler after the header as your first big change in volume.

@nostylecaleb3106

7 жыл бұрын

Brian Donegan what do you think about a magnaflow catback going on a mk4 2.0 vw golf? Its stock engine until i can get the money to work on it more.

@peterk.2772

5 жыл бұрын

Too Stancy I had a 2000 2.0 Golf 2 door. I had a Vibrant cat back exhaust and a KN washable panel filter put on the car. The midrange performance felt a little better. The change in performance was slight not dramatic. The exhaust tone was lower and louder. My advise is if you enjoy listening to the stereo while you drive don’t change the exhaust.

Thank you. Explained alotta questions I had!

Backpressure is simply referring to the pressure losses caused by a large quantity of air trying to squeeze through relatively small pipes. The larger the pipe, the less restriction it has, but simultaneously the lower the exhaust velocity. Optimum is a balance of the two.

The measurement you got was from 2 different spots in the system. You have to pull off stock one and measure it from the flange.

Wow this guy grew up on KZread

This man is extremely smart. It's a pleasure to watch these videos.

Thanks so much bro, I've always wanted to learn more about exhaust systems in general and your video definitely made sense and helped me understand it! Love your vids man, keep up the good work! Hopefully when I get my 2016 WRX, I'll be more knowledgeable about cars in general through your videos!

JESUS CHRIST, what happened to the comments in here? xD

@crunchysoup406

11 ай бұрын

ikr lol

"simple math" (points to something in Chinese)

@davidvalle3068

3 жыл бұрын

it is simple

@jeezy4764

3 жыл бұрын

Quick maths

@ollie2244

3 жыл бұрын

Pi Also pie, I love pie.

I absolutely love this channel, just found out about it and keep watching all these interesting videos!

your videos are amazing man , i really understand everything u say so easy !! thx again and keep up for good work !!

Yep, traded in the Integra for it. They ended up having to pay me, resale on Integras is killer...

You can't just say "oh it's 60% larger so it's good for 60% more horsepower". There is more airflow potential, but that's not really as important as you're making it out to be. If an engine needs to push more air out, it will just increase the flow rate through the pipe. Up to a certain point, this doesn't cause an issue. I upgraded a Mach 1 Mustang from 300 HP to 520 HP, I have 3" diameter exhaust piping. Going larger isn't going to help me much if at all. The original diameter was 2.5" and I increased the horsepower by about 73%. The speed of the air flowing through the exhaust just increases a bit. You won't really see any gains on a dyno by switching to say, 4" exhaust piping. In fact, you will probably lose some low end torque. Most of your videos are really good, but frankly there's some misinformation in this one.

@nickdseidel

8 жыл бұрын

I disagree with you, while your right that putting an exhaust system that is much too large will cause losses in low end torque, the extra back pressure caused by more exhaust gasses will have a negative effect as well. So if you ate going to significantly increase your horse power and keep your stock exhaust, you will deffinately not reach the full potential.

@kingcrimson234

8 жыл бұрын

Nick Seidel I was mainly talking about pipe size though, a stock exhaust system usually has very restrictive cats and mufflers. I was more referring to having high-flow cats and mufflers already and then changing the pipe size. It doesn't matter much unless you are doing some truly insane power upgrades. I should have been specific about that. In the video, he was suggesting that a 60% larger diameter pipe is good/ideal for 60% more horsepower when you really need nowhere close to that.

@nickdseidel

8 жыл бұрын

+kingcrimson234 Okay I deffinately see your point now, and you're right, if you're going to install high flow cats and mufflers you really don't need bigger pipe diameter.

@kingcrimson234

8 жыл бұрын

65PontiacTempest That's 100% true. Every build has its own sweet spot for pipe diameter. I went the forced induction route personally. (Procharger) A little bit bigger exhaust may make more power, but I'm pretty happy at my power level. Alright, I lied. I'd like some more but I'm nervous about my factory rods and pistons holding up if I increase the boost!

@captaindeadpool1640

8 жыл бұрын

+kingcrimson234 yea I agree and I think interpretation between us about this is the same I was thinking dam I can go from 140 hp to 225 hp with just a 60mm bigger exhaust ,

You are awesome in car theory and your knowledge is rock! Regards,

You always do pretty dern good vids man. I'm never disappointed. The issue is I get so distracted by your uploads that before I know it I've gone completely down the rabbit hole. lol. Good job. Very simple explanation that helped me understand the topic THAT much better and answered some questions I've had but never asked. Thanks!

Fellow mechanical engineer here. I'd like to understand your reasoning behind your recommendation: Given that horsepower is proportional to exhaust mass flow rate, then by following your suggestion to tune engine until bhp/area ratio is the same as the stock system, this means that you are basically targeting to keep exhaust flow velocity the same as the stock system (mdot = rho*v*A => increasing mdot in proportion to A yields constant v) Is there a reason that you think this is the optimum operating point? Is it because you assume the rest of the exhaust system is tuned to work best at this particular flow velocity?

@Titilomelirifa

8 жыл бұрын

By what I heard he said you start to see a difference around that hp range.

@aiyoo4517

5 жыл бұрын

People fear ur comments that is why you have not been answered

@WaffleShortage

2 жыл бұрын

probably just relying on the assumption that the exhaust flow interaction with everything else was engineered well by the original engineering team at whichever car manufacturer. it's a good rule of thumb for the layman, but obviously some crazy custom shops and engineers who want to bore out cylinders and do all kinds of their own crazy tuning and dyno analysis might stray from this guidance. i think this is meant more for like, the average 'car enthusiast' who just wants to slap some parts on and not actually have to have a staff of like 5 guys working to redesign and rebuild his engine and do days or weeks of diagnostics and troubleshooting and such. is it absolutely a scientific and great rule? maybe not... but it's probably good enough for the consumer.

So if i had say 2250 hp, would I find significant gains from a 22.6" catback exhaust?

@EngineeringExplained

10 жыл бұрын

No, it's certainly not a linear relationship, and I've oversimplified it, but with 2250 hp you would certainly be restricted with a 2" exhaust.

@JavTheRipper

10 жыл бұрын

Straight pipes!

@clipsedrag13

10 жыл бұрын

pat I'm so happy you made this comment... I signed in and everything just to comment on how this was explained in the video. I'm not trying to criticize the poster because I'm sure he understands engine power and back pressure better than he explained in the video. What I'm trying to figure out is if he meant at around 260hp you start to notice the best gains from a 2.5" exhaust? For the most part 2.5-3" exhausts will take you up past a thousand whp before you just run straight headers on a 4 cyl.

Its great to see you becoming more popular, you definitely deserve it. I keep learning more and more from you, so much that i can show off my knowledge to these so-called "car guys" I'm friends with.

Thanks a lot for your videos, you are saving me so much money in learning what car mods actually do and how to use them.

or you could just say: 1.Catalytic Converter = clears the gas so it's not harmful to enviroment (remove it you don't need it) 2. Resonator = keeps the flames from going out (remove it so your car can go boom boom) 3. Muffler = reduces the sound of your car (remove it for loudness) so yeah pretty much remove everything and use a straight pipe for eargasm :D

@malcolmcarey6519

5 жыл бұрын

This would be a bad setup for a daily driver tho, right? Your girl won't be impressed when you're driving down the highway and your car is too loud to have a conversation, keep the resonator & muffler. Also take care of the planet dammit, keep the cat

@GhostOfAMachine

4 жыл бұрын

I only removed the cat. Kept the resonator and muffler because drone noise on highway is fatiguing

I am sorry that you had to add the "listen closely" thing to the video. People...

I would certainly agree, if their reason is for increased performance. If they simply want a different look/sound, I'll allow them to make their own subjective decision on whether or not it's better. Like I said, I do hope to eventually get some tests on this.

thanks for the refresher..love your anolog vids we need them. you are great!

Nice hat

it would be nice if you could at least six played everybody that by getting extra horsepower by putting a free-flowing exhaust you lose torque if you lose torque you lose fuel economy if you don't care about fuel economy that go ahead and free fluid will make the exhaust sound the way you want it but if you're worried about the fuel economy and you need the torque it's good ideal to give them an option all the pros and cons between free flow and standard exhaust thank you

Thanks man your allways right there when i need the technical explanation@!

I love this guys videos he makes things so easy to understand

how about straight pipe?

@misterawesome1234

10 жыл бұрын

literally, a straight pipe.

@skaargan

10 жыл бұрын

Reasure i was hoping some explanation on the benefits and drawbacks of the system,

@misterawesome1234

10 жыл бұрын

U can google it, not hard to find some pages with decent information. From the top of my head, the lack of a muffler increases performance ever so slightly by increasing flow. Also makes look douche-y with the obnoxiously loud. Just don't do it please

@NextSelection671

10 жыл бұрын

mat arif leen My Nissan 240SX has a straight pipe exhaust. Header to Muffler was 1 pipe, almost no air restriction. Benefits? 1) Noticeable power gains Drawbacks? 1) Less engine response. 2) EXTREMELY LOUD! It's a track car so I don't care.

@chadw8481

10 жыл бұрын

it depends on what your putting the straight pipe on. even the diameter of the pipe would change what a straight pipe would do.

So why DO you guys across the pond call the exhaust manifold the header? What is the intake manifold known as, stateside?

@EngineeringExplained

7 жыл бұрын

+Liam O'Flaherty why do you call the trunk the boot, the hood the bonnet, etc etc. Different vernacular, just how the world works. We call it the intake manifold as well.

@Rhythmeister

7 жыл бұрын

Engineering Explained I'm wondering why one manifold is still called a manifold and one a header, it baffles me! Keep up the good work btw :)

@Birdskyhigh

7 жыл бұрын

Engineering Explained I have a question about the ford ecoboost motor. I just got a 2013 f150 with the ecoboost and the dealership says that straight piping it will cause the tubos to overspool because the backpressure isnt there anymore. Is this true? Do I need backpressure in a turbo motor?

@markfrye9602

7 жыл бұрын

Nathaniel Hylton yes u need some form of back pressure otherwise your turbo is running a lot harder then it needs

@bodyrepairuk8783

7 жыл бұрын

Long story short exhaust manifolds are cast iron, fairly heavy, have smaller tubes and they're not all equal in length, Headers are aftermarket which use individual steel tubes for each cylinder, are all equal in length and have wider tubes, both have advantages and disadvantages depending on whether you're after performance or longevity

A mathematical explanation, very nice. Often people want exact numbers but don't take into consideration the MULTIPLE variables. Knowing where the exhausts limitations are by diameter will be very helpful thank you.

Correct, as I mentioned in the video it depends mostly on the most restrictive point. It's a process which requires multiple steps to do it right.

Why do you do area and not volume?

@EngineeringExplained

8 жыл бұрын

Area restricts mass flow (volume).

@W1llDaBeest

8 жыл бұрын

Okay. Thanks.

@ultimate1576

8 жыл бұрын

+keepthinkingPC Each car is different. Some cars have really restrictive factory exhausts while others have highly tuned, highly optimized exhausts. If your car has a restrictive exhaust, you will likely see gains with a cat-back alone. If your car has a very well tuned exhaust, you'll likely see better gains with upgrading intake/bolt-ons first.

@devolutionrc8016

8 жыл бұрын

cat back without resonator on my 94 320i shaved 1 second of the 0-100 kph time, I also removed the baffling from the air box.

@devolutionrc8016

8 жыл бұрын

ammendment it wasn't a cat back but high flow cat and cat back.

wait, lower the sound? who would want that?

@scottbrixey6284

10 жыл бұрын

It's not really "lowering" the sound, just changing it. People want a low rumble from their exhaust. It's just changing the sound, which may sound like lowering, but it's really not...

@djnekkon

9 жыл бұрын

lower fre0/tone. thats what you want "deep"

@OBARRVAGOS

6 жыл бұрын

I'd rather have more flow than loud

Mechanical, and you are correct. I've learned the vast majority on my own time.

Thanks for doing these videos. Knowledge is power!

So kids, you're supposed to get a bigger exhaust AFTER you put your engine mods in. Bigger exhaust will decrease the power of your stock engine.

@benjay2985

8 жыл бұрын

+Jsp P5 Taunus unless it's a turbo Car Then the best is really No Exhaust and just about 3-4 inches coming out of Turbo Exhaust./..

@willdog3

8 жыл бұрын

Idk if that's true, I've heard you want some backpressure with most engines (idk about turbo though). But that could be wrong. I'd like to see a comparison video of a car with and without exhaust after the turbo to see what happens.

@JobeMinacum

8 жыл бұрын

Lol what?

@dragonslayer1483

7 жыл бұрын

how is that possible? isnt backpressure a myth?

@willdog3

7 жыл бұрын

Back pressure is not a myth. The argument is whether you need some or not. And Engine Masters tested different exhaust vs no exhaust and found that even 3 inch straight pipes are better than open headers. Now, you can definitely tune an engine to account for zero back pressure, but for most applications you will want exhaust anyways, and more back pressure can also reduce emissions and increase efficiency.

Is he wearing a wig?

@boostedkidproductions9719

5 жыл бұрын

I thought the same thing😂😂

@boostedkidproductions9719

5 жыл бұрын

Nicolas A lmao

@vinbinjil

3 жыл бұрын

keep in mind that this is in 2013 haha

almost 1 million subs! great vids keep it up !

Hey thanks Napoleon Dynamite. That was hella informative.

lol that's a catback for integra. know that shape by heart. XD

This is old technology EVs are the future :) You guys will be like the steam engine people nowadays, yawn.

It could be, perhaps. I'd look into some forums and see if you can find some dyno sheets, or from exhaust manufacturers. See if they have some data to back up any claims they may make.

This was so helpful! Thank you

Great video... Also thanks for the added math infos, made this video more interestingly cool. Double thumbs up!

You made this so much more simple than any forums I read on.

I have no modifications on my 3.7 5-cylinder engine. I installed a MBRP cat-back exhaust on the truck and I noticed a significant improvement in throttle response and acceleration.

They have fairly large pipes for each cylinder, and these are individual pipes for each cylinder. They're also much shorter than in a car, thus have much less losses.

hey was just talking about this subject glad i found ya stay up & keep up the good work your awesome for explaining all of what how & why this all work's out for someone like me looking for that sleeper sound thank you two thumb up your frink spike king ;)

7 years has done you well my friend :)

over a million subscribers? killing the game!

Yep, eventually I'll get around to install videos.

Im getting mine today ! I can not wait !

Thank you 4 makeing videos like this there very helpful

hey dude, nice videos.. im learning so much! greetings from Brazil

As described in the video, it will depend on the power, and the part of the exhaust that's the most restrictive.

Thanks! Love your videos by the way, keep it up.

I love Yonaka, great company. Awesome video sir!

This is the only video I’ve seen that correct and well explained.

@EngineeringExplained

5 жыл бұрын

Thanks for watching!

Thanks for the video. I ended up buying that exhaust for my 01 GS-R and I love it. Do you have any updates on your Project Integra? - Great channel btw!

You can buy them on Yonaka's website, or from a dealer, or many online sources. They're not too pricey either.

This is awesome, Thanks for sharing

Definitely subscribing I've learned more I. The past 8 mins watching two vids then I have spending a week with my friends who are into card thank you sincerely

@EngineeringExplained

10 жыл бұрын

Haha, thanks for subscribing.

Simply and beautifully explained

Depending what you're going for, I'd say engine mods first. Depends on the make though, and so far I haven't done any dyno testing to see if there is a performance increase just on the stock engine.

@M20AFKS

2 жыл бұрын

try it please

Very informative video! Thank you!!

nice videos man, very well explained

Yep, 140 at the fllywheel. I have a video on engine vs wheel for anyone unsure of the difference.

I need to tell you that you have taught me so much !!! Thanke you so much !!!!!

Dude , you are smart as hell!!! Good info vid

Me too!

Yes, I measured to make sure before making the video, but did fail to mention this.