Quickly Clarified - Blow Off Valves vs Bypass Valves in 4 Minutes!

Hopefully KZbin's weird algorithm won't prevent this from being put into recommendations. In this video, I'll be explaining how Blow off valves and Bypass valves work. This one took quite a while to make since it's my first attempt at making some sort of animation. Anyways, hope you guys enjoyed this video and found it helpful!
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[@simsneon2]

I used to work for Garrett granted this was over five years ago but the sum of the statements that you made in regards to the CBV are incorrect and high horsepower applications these were well and low and high horsepower applications one thing you did mention was correct was the majority of the time space is needed but this is easily overcome

[@JCMediaYT]

thanks for the correction, pinned your comment

[@KreatorOfDeath1985]

What the hell are you even trying to say?

[@byron1dagg80]

@@KreatorOfDeath1985 Bro he use to work for garret!!!! who tf is garrett?

[@chriistiian5514]

@@byron1dagg80 Garrett is a company known for their turbochargers. Their entire brand revolves around turbocharging cars.

[@treyt6474]

Bro, use some punctuation. I can not tell what youre saying

[@ESPLTD322]

I’m pretty dumb when it comes to understanding turbos and superchargers but you made complete sense to me and did it quick and simple too

[@JCMediaYT]

thanks for letting me know, glad the explanations were clear to you :)

[@georgemixalakis3724]

Yea like for real i had a teacher explain it in greek and i just told him straight up sir i understood nothing I'm off to go found it on KZbin he got mad

[@shannonelvi6365]

Mind blowing! Amazing! I did not know before watching this video, thank you for opening my eyes!

[@sanavip]

Thanks, short and easy to understand video. Great job!

[@JCMediaYT]

thankyou very much! glad it helped you out 😁

[@ninjadoge3215]

Great video! Very informative and straight to the point.

[@JCMediaYT]

thanks a lot man, glad you enjoyed it!

[@miksu7784]

Keep up your videos bro!! Really clear and good video, no other bullshit only the stuff i wanted to know!!!

[@JCMediaYT]

thanks a lot for the feedback man, really appreciate it!

[@realtissaye]

Thanks for this! It was an excellent explanation and video.

[@JCMediaYT]

thank you!

[@josephtan7192]

Wow this video helped me a lot thank you 👍

[@mobilkencengchannel]

Nice info, btw my car using OEM bypass valve but due to make minimum lag i took it off and get early boost when i'm shift gear or exit cornering it cheaper way rather than using anti lag system 😂

[@CP-mt7tl]

Nice and concise, thank you!

[@JCMediaYT]

thanks a lot for the feedback! glad you enjoyed it :)

[@ardiyudha6120]

straight to the point! thanks!

[@JCMediaYT]

I'm glad you thought it was, thanks!

[@marth3116]

Great video dude Got yourself a new sub

[@JCMediaYT]

thankyou! appreciate it a lot, feel free to check some of the IRL videos i've made :)

[@globalteamwork4light]

you will regain the loss of recirculated air by the wastegate being closed, therefore not leaking air = faster spool time. so bov controlled boost is best.

[@abdullaalmazeedi4319]

Nice vid 👌. Thanks for uploading it. You explained the differences and all, now we nknow why BOV isn't good,but regards the BPV you didn't explain much why it might effect the turbo. You only mentioned that BPV isn't good for higher boosts and if this is the only reason then we can say that BPV better than BOV in general Wich you or the readers to write why

[@timm.6391]

Honestly, at lower boost you can completely bypass it, if your driving rather hard most of the time... you'll be fine with neither... and you'll get that short "flutter " between shifts if you clutch long enough. For daily driving, yes you'll want one or the other...but if your mostly tracking your car and you are below about 25 psi boost (note* turbo dependent) your fine not running either.

[@anglerdanger7270]

great fucking explanation loved it, bro. Explained very throughly.

[@JCMediaYT]

thanks a lot man!

[@timCole53]

Have you got a diesel bov install clip ?

[@kidyoop]

Best video ever

[@youcrany]

I got a question, When using a blow off valve, I know a lot of cars have a Mass Air Flow sensor, which senses the amount of air going into the engine. If using a blowoff valve, the air that is shot into the atmosphere is accounted for. Therefore the Mass Air Flow sensor will tell the ECU which tells the fuel injectors to push more fuel causing the engine to run rich/lean. Is there anyway around this?

[@JCMediaYT]

normally, you'd have to get a retune but so far, mine didn't have any issues with getting too rich/lean, having an Afr gauge is very useful

[@JETZcorp]

I had this exact question about a centrifugal supercharger kit (similar situation to turbos), and just found the answer to my question. It depends on the location of the MAF sensor. Some kits will relocate the MAF to be between the intercooler and throttle body, so as long as the BOV is before the MAF, it'll never know the difference. The MAF will only see the air which made it past the BOV and is about to pass the throttle. The kit I was looking at is like this. If your MAF is located before the compressor, then you're going to deal with the rich condition on blow-off as you described.

[@Chastor97]

perfect explanation

[@JCMediaYT]

Thank you!

[@danielnihtianov3870]

If u unplug the hose that returns the boost and leave the boost go in to the air. Will it will make the dv valve like the blow off . And of course u block the other side of the hose that may suck some trash in ur turbo?

[@idontknowwhattonamemehself3413]

Yeah but then the Turbo isn't spooling up any air, if you block the other side

[@Mysohvaperuna]

What is that red pipe coming out of the blowoff valve and bypass? And whats the idea in it

[@genericcarchannel]

Ive got a question to anyone that can answer im wanting to supercharge my mx5/miata and all other kits that use the m45 charger from the cooper s seem to run both . Does it really need both or would a blow off valve be fine on its own

[@frankprotokowicz5762]

If I’m switching to a blow off valve, can I just get rid of my diverter valve? Audi A4 2.0t B7 thanks

[@JCMediaYT]

yup, you can only have either a diverter or a bov

[@BRUNOCMUSIC]

Excelent! thanks so much! would you please help us explaining what a diverter valve is? thanks!

[@JCMediaYT]

a diverter valve is pretty much the same as a bypass valve

[@BRUNOCMUSIC]

@@JCMediaYT thank u so much!

[@JCMediaYT]

no problem!

[@meixizou86]

I have a question: What does the "red" cable (the one on the lower part of bypass valve) function? it's at 1:25 mark.

[@JCMediaYT]

that's the vacuum line for the valve to open. so when you let off the throttle the vacuum in the line opens the valve.

[@meixizou86]

@@JCMediaYT thanks for your response!

[@FunkyHotDog]

I don't understand one thing, there is nothing preventing high pressure air escaping out the air filter in a bypass valve system. How is that then any different from directly venting air to the atmosphere?

[@alexsakon]

You didn’t mention the main disadvantage of the blow off valve and why you don’t find them on production cars - you have mismatch of actual intake air and what’s measure by air sensor since you’re venting it off

[@ariefaulia8193]

How about the Plumb Back BOV? Is that a combination off BOV and BPV?

[@JCMediaYT]

a plumb back pov would kind of count more as a bypass valve because it's being plumbed back into somewhere else, bypassing certain components. At least that's what I think though

[@ihateeverything3972]

So Kawasaki H2(R)s have a bypass valve instead of a blow off standard right?

[@JCMediaYT]

not 100% sure but most likely

[@NitroNuggetTV]

superchargers generally always use bypass valves because BOV's would always be venting (wooshing) whenever you're of throttle, which most people find annoying and obnoxious

[@NitroNuggetTV]

There is no difference in turbo lag between both valve types, bypass valves don't recirculate any appreciable pressure back into the intake.

[@redsitchon4953]

can i use them on a hyundai accent 1.4 mt gas?

[@JCMediaYT]

if it has a turbo, yes

[@EdA-hn3ht]

No music please

[@A.O990]

Thank you very useful, can these be installed on supercharge as well?

[@JCMediaYT]

Yup! Usually people install BOVs though, not BPVs.

[@jattintruck]

Heyy bro i want personal information about that … i want stututu sound … what is the main reason and part that make stututu sound

[@JCMediaYT]

its from running no bov or bpv. here's an example of what that sounds like: kzbin.info/www/bejne/n16ZlZ1trsSMesU you'll get much more flutter out of a car with a front mount intercooler rather than a top mount like mine.

[@jattintruck]

@@JCMediaYT oh okey bro but i want it on my tractor.. will it work on it?

[@JCMediaYT]

@@jattintruck I'm not sure how it is on tractors though...

[@cherokeeburden2724]

Is a bypass valve and diverter valve the same thing?

[@JCMediaYT]

yup

[@LB83.]

Would the by pass valve increase back pressure ?

[@JCMediaYT]

nope, it wouldn't really make a difference

[@georgemixalakis3724]

So when you have a car with a stock turbo does those work?

[@JCMediaYT]

yup

[@georgemixalakis3724]

@@JCMediaYT damn 😂 so i can put blow-off valve on my stock turbocharger on the Toyota? That's Great 😌

[@manfredhenning6235]

Question. Can a "bypass valve" work as a "blow off valve" ? If you just remove the pipe that runs back to the intake manifold (or the place the extra air goes to and obviously block that part up) ? I will be running a carburettor, so I don't think that will affect air flow readings etc... The reason I'm asking, is because i already have a bypass valve ( I bought a supercharger from a toyota which had the sc12 supercharger on it and the bypass valve is the one that came with it) So my final question is; should I go by a blow off valve? Or should I just use the bypass valve as a bypass valve and be happy? Or can I use the bypass valve as a blow off valve?

[@JCMediaYT]

theoretically yeah, since they are basically the same thing (a valve actuated by vacuum lines)

[@JCMediaYT]

usually cars come with a bypass valve made of plastic which can't handle increase boost levels, hence why some people may change to a bov (also for the sound). However, a higher quality BPV works just as well so it's mostly down to preference on which sound character you prefer

[@manfredhenning6235]

@@JCMediaYT Ok thanks for the reply. The toyota BPV is indeed made out of aluminum and I'm only going to 8.2 psi boost (stock toyota is 8 to 10 psi boost stock(i think, going to make sure on that first)). Anyway, I guess i can always just experiment, and see what happens. Thanks again, i just subscribed to your channel ( °^°)

[@JCMediaYT]

ahh yeah, should be just fine then. good luck with the build man! and many thanks for the sub!

[@asdf52708]

I want someone to do a dyno test experiment to show how much wear a turbo really gets from having no blow off valve

[@vinkats3050]

Like ur background music

[@JCMediaYT]

thank you!

[@surprisepowertv9915]

I feel you on KZbin. They hacked our account REALLY BAD. Went from 750$ ad rev a month to about 30 bucks! Not kidding and not exaggerating at all. I started this brand new channel I am on now...

[@JCMediaYT]

yep, the algorithm is just plain weird at times...

[@AkedaLvl999]

It's a great topic but I'm not sure why you thought you needed music playing in the background.

[@JCMediaYT]

yeah at the time I didn't realize that I probably shouldn't put music with lyrics when talking, more recent videos use instrumental music and I adjust the volume enough so that I can clearly be heard, thanks for the feedback though!

[@kimuranaito1493]

Bro...can turbo diesel engine use the same blow off valve as the petrol engine?

[@JCMediaYT]

absolutely, just depends on the mounting to the piping. it has to be airtight so there's no boost leaks

[@kimuranaito1493]

@@JCMediaYToh nice...thank you for answering my question😃 I always wanted my car to have that Pssshh psshh sound...I just bought a used pick up truck couple weeks ago...4WD Mitsubishi Triton year 2010...and I heard that if your car doesn't have throttle plate you can't install BOV...but luckily my truck does have 1...hahaha...turbo with no psshh psshh is like hotdog with no sausage😆

[@JCMediaYT]

@@kimuranaito1493 anytime! I'm not too sure about the throttle plate stuff since I don't have any diesel cars, but goodluck with it! feel free to leave any more questions if you have any

[@antpz_]

so what would really be best?

[@JCMediaYT]

mostly preference of what u need/want really. I run no bov/bpv, so my turbo flutters a lot

[@004947]

So from wat I can tell bov only vents fresh air, so then why is it against the law to have one in my state ?

[@JCMediaYT]

I believe it has something to do with emissions. I'll try explain it as simple as possible. When the air gets sucked into an intake, it passes through a MAF (Mass Airflow Sensor) that basically reads how much air is going into the engine. The ECU reads this and injects the appropriate amount of fuel. When you use a vent to atmosphere BOV, the air is escaping the intake system and going into the air, but the ECU still thinks that there is air going into the engine. This creates a "rich" condition where to much fuel is being injected since the air was vented.

[@004947]

@JCMediaYT ahh ic, i understand why the law is that way now, thx for that.

[@trojangpete8]

Good simple information, however the music in the background made me play the video over several times to understand.

[@JCMediaYT]

thanks for the feedback! will keep that in mind in future videos!

[@alundrasrt]

Beware if Maf fitted. You'll running rich and bad Idle if spring is too weak.

[@user-vm3fm1cp8s]

Sooo the bypass makes the stutututtututu?

[@JCMediaYT]

not exactly, usually running no bypass valve or blowoff valve will get you the flutter but the bypass can give you a bit of flutter or 'fwoosh' sound

[@asphyxia6664]

Meanwhile 1000hp Supra: BOV?Bypass vlalve?

[@aristidescumbana3285]

change position/orientaion of compressor and turbo

[@0SuperTacoMan0]

Good info, but I don't think the background music was necessary.

[@edwardmoody4180]

I was 1k

[@tdilly8530]

You did too well to not like and comment

[@JCMediaYT]

thankyou! much appreciated!

[@glennt1962]

Good video don't need background music makes it hard to listen to you.

[@JCMediaYT]

thankyou!

[@eatinbabiez]

Not to be rude, but it's difficult to hear you with the background music.

[@JCMediaYT]

no offense taken! in hindsight the music was definitely too loud, thanks for the feedback!

[@Vexrais]

All superchargers are turbochargers but not all turbochargers are classed as a supercharger

[@XxCrAzY509xX]

I don’t run either 😏

[@idontknowwhattonamemehself3413]

N/A Lets go

[@MrArrakis9]

this content would be better if you chose a song without lyrics in it. its harder to understand what you are saying when you have music with singing blasting in the video.

[@JCMediaYT]

yup, a dumb mistake i made with earlier videos, made the switch the instrumentals though... thanks for the feedback anyways