Blow Off Valve Dissected [GO FAST BRETT]
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- เผยแพร่เมื่อ 5 มิ.ย. 2024
- Ever wondered what's inside a blow off valve and how it works? Wonder no more as mechanical engineer Go Fast Brett dissects a valve down to it's bare components and explains what they each do.
In this brand new series created by Mighty Car Mods, Go Fast Brett explains all things turbo, blow off valve and choo choo.
This series is proudly brought to you by Mighty Car Mods and GFB
www.gfb.com.au
www.mightycarmods.com - ยานยนต์และพาหนะ
![Boost Pressure Explained [GO FAST BRETT]](http://i.ytimg.com/vi/EVcFiYKxpMY/mqdefault.jpg)
It is really interesting to not only see how but why. Thanks again Brett for taking the time to explain design choices as well as function - revealing the inside details gives an incredibly rare insight. You guys rock.
So nice to hear the word Aluminium. not Aluminum.
can relate with "Niss-an" and "Nizaaaaan" like the Americans say.
Nissan is pronounced properly in America. you should search through the back log of videos on here an find the video an hear a Japanese woman go though the list of names.
Nees on
Haters gunna hate.
Taylor swifts in the room folks......lol.
In this episode, Brett shows you how to go fast while blowing ...
Fuck, I'm sounding like Moog :P
Diggin this series... I am very proficient in the automotive world... but you are never too old or experienced to learn or at least get a refresher :D
Could you guys do a video of all the different noises BOV's can make, and if there is a way to control the sounds (like whoosh vs chirp vs flutter)
Love this series! So glad you guys made it and Brett wanted to be a part of it! I love to know things about cars, Im going this christmas getting myself a bleed valve on my Alfa Romeo 1.9 JTD.
i really like this "series" hopefully we get more episode in the future on other parts of the engine
Thanks Brett and MCM!! That's very interesting and clear info i've learnt in a while!
I just got this in the mail today for my Mazdaspeed can’t wait to try it out!
Brett, you're very well spoken! Keep up the great work
love your work go fast brett.
Thanks, Brett. 👍
maddddd series keep em coming
diverter valve dissection would be cool too see as well
Absolute legend
Keep it up Go FAST BRETT, we love you. Fuck the trolls.
Cool and sold!!
What material the piston ring are made of, exactly?
very interesting video
Is Brett going to cover a topic non-BOV related?
Brett works for GFB; a manufacturer of Blow-off-Valves, wastegates and boost control accessories. So it makes sense for him to talk about these things.
Hey Brett! Do y’all sale those parts for the bov? I powder coated my bov and the plastic parts inside melted! I need replacements parts for my bov to get it back to working condition!
why i get the vibe that Brett drives a Volvo or a Fiat 70 in a 80 zone. can you explain the difference between superchargers soon
You can categorize things any number of different ways. I'd argue there are two main types of supercharger, positive displacement (commonly roots, screw, but also wankel, ect) and non-positive displacement (mainly centrifugal blowers, but also rarely axial compressors).
Really quickly though; common positive displacement superchargers move very similar air per revolution at both high and low rpm, and thus will give will give full boost constantly when at full throttle, regardless of engine RPM or load. In this subgroup Roots styles are historically the most common, being basically just two long gears that mesh. This allows air to flow freely around the outside, but not back though the middle where the teeth meet, thus pumping a pulse of air. Its fairly cheap and due to the pulses it sounds cool, but screw designs are just generally better (although typically more expensive since it needs better manufacturer tolerances), being basically the same setup but with a twist along the gears, so instead of pulses it provides constant flow.
Centrifugal options on the other hand are basically just a impeller that is spun really quickly, thus throwing the air to the outside. Unlike positive displacement designs them make linearly more boost as you increase in RPM, so you don't have full boost at lower rpm, but they are slightly more efficient than their positive displacement counterparts. In theory both these factors would make it more fuel economical to drive on the street, but its still worse than a naturally aspirated engine or turbo, so they where never common on factory cars. However that slight efficiency improvement made them very popular in some racing fields that employ intake restrictor plates, like NASCAR, since the air you draw through the plate is basically capped (you can't make a stronger vacuum than one atmosphere), so minimizing parasitic losses is a ideal way to improve power. They have also become popular in the cheaper aftermarket kits since you tend to be able to make more power on a motor that was designed for naturally aspirated everyday running before you have problems. The reason for this being its supplying less boost down where most factory car\trucks have there highest volumetric efficiency (let the most air in per stroke) so the cylinder pressures (both pre-ignition and peak) remains lower, avoiding detonation or catastrophic failure like blowing a head gasket while still giving similar power at near redline than its positive displacement brethren can at the same peak pressure. If that sounds to good to be true you get the same result on a positive displacement setup by just not being on the gas pedal as hard till you reach high RPM. If your budget and\or feild or racing allows it, a turbo is normally a better option than a centrifugal supercharger as you can control boost on the fly rather than needing to change pully's, and set boost curves instead of linear to RPM. There is also typically lower parasitic losses from turbine back-pressure in the exhaust manifold than the power stolen via belt for the centrifugal charger.
Do you have a specific bow off valve for the Legacy blitzen Jdm twin turbo or will the response work ?
nice
CHHHOOOPPPEEEDDDD
0:05 missed an opportunity to say 'choo'
why didn't blow off valves evolve to be butterfly valves? wouldn't this be easier to seal off completely in contract to the cylinder? considering this cylinder design would never be fully airtight.
The simple answer is that this style is proven and works. It does what is necessary very well and very quickly. The absolutely miniscule amount of air you're talking about being leaked is completely negligible when dealing with a turbo system. A butterfly valve is used so you can control the opening and closing of a valve externally. The piston system works completely unaided by using boost pressure balance and vacuum pressure. It would also be incredibly difficult to produce a butterfly style valve that is able to open and close quickly and accurately and use the same principles of boost and vacuum balance and differentials.
solid answer. thanks for the lesson!
Are these sleeves hard anodised in Australia?
cool
My car comes with a tiny turbo and OEM WASTEGATE. i'm about to install a BOV (atmosphere). should I Disable the wastegate (Closed all the time) or the Two can Co-Exist? [ps: its an internal wastegate with external actuator thingy]
... Two different sides of the turbo...waste gate is on the exhaust, bov/bpv is on the intake. A fully closed waste gate will mean constant spooling and build boost all the time (beyond the efficiency rating). This bov/bpv let's inlet pressure go somewhere when off throttle, either to pre-turbo inlet or out to atmosphere (phsssh)...most all modern turbo cars have a bpv. (most) Your 80s turbo cars ran bov. Run what your car came with.
@@K03sport i was a noob back then😅. Now i have a bov installed and the bpv disabled. The wastegate is untouched.
FLANGE!
Maaaadd!
It may be a dumb question, but why not just use steel for the outer assembly instead of going to the effort of a hard coat on aluminum?
Hamish McGregor steel is more subject to wear, and you have to paint it or put some sort of galvanizing or anti-rust coating on it to prevent wear anyways, so it's just more trouble. Machining aluminum is also more precise as the metal is easier to shape without chipping and breaking
probaby cheaper than machineing stainless sleeves
So, who had this design first. Gfb or forge. Because that's clearly same as forge splitter.
all I got from that is air gose in then zutututut magic unicorn power
Hadouken on intro
Hi
NO! I knew the Brits misspelled Aluminum, but now I find out that the Aussies do it too???
Considering America is the odd one out, maybe you're misspelling it? :p
America also refers to Petrol as Gas....
UK al-u-min-yum
US A-lum-in-um
US - Aluminum
World - Aluminium
Syrus54 you can't say you speak the English language and then say we brits say it wrong.
That bov is so basic when you take it apart and yet it is still sold for $400 fucking crazy
this is a go fast part. It's price reflects it's importance in the system. If you look inside a smart phone the same holds true
1. It is called a Go Fast Bits (GFB) BOV
2. It doesn't make your car go faster
3. It is not that important in a turbo system technically you don't need a bov
Do your research before you make a comment and I am not hating on GFB their products are fucking fantastic I was just making an observation!
the profit isn't very high when sold for 400$. they probably produce low volumes locally instead of high quantities in china
+Mark_R33 you could be right but GFB are very very popular all over Australia and New Zealand.
Mark_R33 that and probably have to include their development costs in the product. Price makes sense for something that is essentially a niche product
SUB 1000 CREWWWWWW WASSSSSSAAAAAA
yo
Ha he said nipple 😂
:(
Vote for Donald Trump!
Hell no !
Moog for President, Marty for VP
Heh... nipple
SECOND COMMENT BITCHES
Poop