school me, blow off valve vs diverter valve, vs waste gate

[f3racer]

whats the difference? im finding after market wastegates and blow off valves but i see on the forum here stuff about diverter valves.

[JWatson]

Suit up!!! (flame suit that is)

[B5stgIII]

IBTL

[f3racer]

Suit up!!! (flame suit that is)

im here to learn

[AudiNFS]

wastegates are part of turbos, BOV's are generally bad for our cars unless recirculated correctly, and a DV (diverter valve) is like a BOV the only difference being it doesn't blow off the air into the atmosphere.

[f3racer]

wastegates are part of turbos, BOV's are generally bad for our cars unless recirculated correctly, and a DV (diverter valve) is like a BOV the only difference being it doesn't blow off the air into the atmosphere.

thank you. now what kind of performance gain will you see from aftermarket diverter valves

[omgwtfbbq!]

Blow off valves, pop off valves, and diverter valves are all designed to prevent compressor surge by allowing the air between your turbo and throttle plate escape to somewhere other than back out through the turbo when your throttle closes. BOVs and POVs generally just vent the air to the atmosphere, DVs route the air back into the intake. A wastegate can be integrated into a turbo, in which case it is known as an internal wastegate. The wastegate can also be a separate entity, known as an external wastegate. The purpose of the wastegate is to allow exhaust gasses to bypass the turbine wheel and flow into the exhaust without spooling the turbo. This is how the vehicle regulates the amount of boost produced by the turbos.

Google would have taught you all of that.

[Dutchsider]

Blow off valves, pop off valves, and diverter valves are all designed to prevent compressor surge by allowing the air between your turbo and throttle plate escape to somewhere other than back out through the turbo when your throttle closes. BOVs and POVs generally just vent the air to the atmosphere, DVs route the air back into the intake. A wastegate can be integrated into a turbo, in which case it is known as an internal wastegate. The wastegate can also be a separate entity, known as an external wastegate. The purpose of the wastegate is to allow exhaust gasses to bypass the turbine wheel and flow into the exhaust without spooling the turbo. This is how the vehicle regulates the amount of boost produced by the turbos.

Google would have taught you all of that.

In a good mood, are we?

[f3racer]

Google would have taught you all of that.

if i wanted to get my answers from google i wouldnt have signed up for audizine.com where the subject matter experts are. thanks for you answer though.

[f3racer]

i dont see much on here for manual boost controllers. are they bad for the audi's? i had one on my daytona turbo z and it worked great. would i need one for each turbo?

[AudiNFS]

thank you. now what kind of performance gain will you see from aftermarket diverter valves

There isn't really a "gain." What the aftermarket DV's do is allow for more boost pressure than the stock DV's.

[Slow4]

i did work for you; paypal me $50 or i come and stick vtec stickers all over "your S"

http://www.audizine.com/forum/showth...uide-for-n00bs

also search the forum.

[Dubluv11]

In a good mood, are we?

thats EXACTLY what i was thinking lol

if i wanted to get my answers from google i wouldnt have signed up for audizine.com where the subject matter experts are. thanks for you answer though.

If we wanted to hear shit come out of someones ass we'd fart... but instead we opted to read this thread... kinda like how you opted to be lazy and ask people who drive audi's instead of use your own brain and search.. yes, you just got schooled quickly with regards to how a BOV, diverter, and wastegates work... however, you could have learned ALOT more from google.. not trying to be a dick or anything... just sayin

[Slow4]

If we wanted to hear shit come out of someones ass we'd fart... but instead we opted to read this thread... kinda like how you opted to be lazy and ask people who drive audi's instead of use your own brain and search.. yes, you just got schooled quickly with regards to how a BOV, diverter, and wastegates work... however, you could have learned ALOT more from google.. not trying to be a dick or anything... just sayin

should've given him "the look" and raped him.....like this guy:

[bps4]

whats the difference? im finding after market wastegates and blow off valves but i see on the forum here stuff about diverter valves.

[Dubluv11]

should've given him "the look" and raped him.....like this guy:

not if this guy has anything to say about it

[f3racer]

kinda like how you opted to be lazy and ask people who drive audi's instead of use your own brain and search..

how the hell do you think i found this site? i searched. i didnt know audi's had or that there was even such a thing as a diverter valve. as far as i knew i turbo cars only rac blow off valves. searching the internet is what yielded my initial question. i found a shitload of aftermarket bov's and waistgates and very few dv's so i asked on here. look if you people dont like my questions then dont say shit. just ignore it. i appreciate the people who actually participate in teaching people who dont know shit. i teach brand new military police soldiers unarmed self defense for a living do you think i get pissed because they didnt google the shit before the came to basic training. no they come to me because i am the subject matter expert. i am a honda and kawasaki certified tech from MMI as well. when people ask me why their bike is running like shit i dont fucking tell them to google it. i share the knowledge.

[SilverS4kg]

right here


sorry i had to.

[Dubluv11]

how the hell do you think i found this site? i searched. i didnt know audi's had or that there was even such a thing as a diverter valve. as far as i knew i turbo cars only rac blow off valves. searching the internet is what yielded my initial question. i found a shitload of aftermarket bov's and waistgates and very few dv's so i asked on here. look if you people dont like my questions then dont say shit. just ignore it. i appreciate the people who actually participate in teaching people who dont know shit. i teach brand new military police soldiers unarmed self defense for a living do you think i get pissed because they didnt google the shit before the came to basic training. no they come to me because i am the subject matter expert. i am a honda and kawasaki certified tech from MMI as well. when people ask me why their bike is running like shit i dont fucking tell them to google it. i share the knowledge.

k but see we arent blow off valve or diverter valve or wastegate experts... what i'm trying to say is... by you asking us... yes we can teach you... but you can learn more by googling the question yourself...

since i was a bit of a dick though... i can tell you this...

the 2.7t(and most stock turbocharched engines) run a diverter valve... the diverter valve takes charge pressure from between the turbocharger and the throttle body, and recirculates it into the intake where it then gets compressed by the turbocharger again...hence diverter/recirculator valve.. the air that gets recirculated back into the intake... is metered air by the mass airflow sensor...and the reason we need air to recirculate back into the intake is to not mess with the MAF readings..

blow off valves, do not recirculate air back into the intake, they take charge pressure from between the turbo and throttle body and depress them into the air, hence atmospheric blowoff valve... however, you can run something that completes both of these tasks, like the forge splitter valve... it takes charge pressure, diverts most of it back into the intake so we dont make the MAF unhappy.. but it ALSO expels some air into the atmosphere so you get that super sweet WOOOSH sound

a wastegate does something similar but on the exhaust side of the turbocharger. turbochargers have 2 impellers which are on a shaft that is driven by exhaust gasses. the duty of the wastegate is to open up and allow exhaust gas to flow around the turbo once it has built the amount of boost requested by the engines ecu. this way the impeller uses enough exhaust gas to maintain the boost requested by the ecu, and any extra exhaust gas not needed to spin the impeller is circulated around the compressor wheel via the wastegate, into the downpipe. Otherwise we would blow our turbo's by overboosting them to 50 psi because ALL of the exhaust gas would go through the compressor

[f3racer]

k but see we arent blow off valve or diverter valve or wastegate experts

awesome answer! thank you. i understand some of you might not actually be experts by definition but i would rather have someone with 1st hand knowledge than some professor who has never actually touched one can tell me. some of the stuff i find on the internet sounds like greek so i ask for a barny style answer so i might can get it a little better. but on the same token next time i will search a little harder.

[Dubluv11]

awesome answer! thank you. i understand some of you might not actually be experts by definition but i would rather have someone with 1st hand knowledge than some professor who has never actually touched one can tell me. some of the stuff i find on the internet sounds like greek so i ask for a barny style answer so i might can get it a little better. but on the same token next time i will search a little harder.

you got something against greeks?? lol

[f3racer]

you got something against greeks?? lol

funny you say that. my boss at the bar i work at part time is this greek guy that looks just like Jim's dad from american pie. and because he's a bar owner he gets more play than a damn sandbox.

[Dubluv11]

funny you say that. my boss at the bar i work at part time is this greek guy that looks just like Jim's dad from american pie. and because he's a bar owner he gets more play than a damn sandbox.

you sure its because he's the bar owner... or is it cause he's greek... cause i'm greek and i seem to have the same problem as him

[Turbo Nerd]

i teach brand new military police soldiers unarmed self defense for a living do you think i get pissed because they didnt google the shit before the came to basic training. no they come to me because i am the subject matter expert. i am a honda and kawasaki certified tech from MMI as well. when people ask me why their bike is running like shit i dont fucking tell them to google it. i share the knowledge.

Steven Seagal and Van Damme trained me in martial arts and self defence.

[bobg94043]

wtf mate??

[f3racer]

Steven Seagal and Van Damme trained me in martial arts and self defence.

looks like you got some old school street fighter action too

[omgwtfbbq!]

In a good mood, are we?

thats EXACTLY what i was thinking lol

Sometimes I am generous

i dont see much on here for manual boost controllers. are they bad for the audi's? i had one on my daytona turbo z and it worked great. would i need one for each turbo?

Most people don't use a MBC because our ECUs control the boost via the N75 valve. We edit the ecu and get more boost. Some people do use an MBC, but there are complications because the ECU gets pissed if it's own boost controller is disconnected. You only need one, it is placed where the original N75 is placed and it controls both wastegates at the same time.

[MikeyB3]

OP, honestly, thank you for being a respectful n00b.

Guys, at least he didnt fly off the handle on his 3rd post, name calling, etc.

"Rich's guide for n00b modding" is recommended reading at any stage in the game. I know Rich, great guy, dude jumped in head first and learned a buttload, then share what he knew. Shit, I read that guide all the time just to be sure that my facts, and his, are up to date. Good stuff.

[shorterthanrich]

the BOV section of my n00b guide isn't entirely accurate, I just havn't had time to update it. If one of you guys writes a very concise explanation of the difference between a DV and a BOV and why it's probably not a good idea to use a BOV, I will put it in my n00b thread.

Thanks for the props, Mikey. It's true, I am a great guy.

[Slow4]

the BOV section of my n00b guide isn't entirely accurate, I just havn't had time to update it. If one of you guys writes a very concise explanation of the difference between a DV and a BOV and why it's probably not a good idea to use a BOV, I will put it in my n00b thread.

Thanks for the props, Mikey. It's true, I am a great guy.

you should paypal me $50 for recirculating your thread since OP stiffed me on the bill.

don't make me come after you and plaster many of these on the side of your door panels:


i can find out where you live and do it!

[shorterthanrich]

Hahaha most of my friends drive hondas and every time I hang out with them I cant help but yell VTEC as their cars remain behind me...

Anyway, I just updated the n00b thread's BOV section to be more accurate. I used some of you guys' wording from this thread in it. thanks.

[f3racer]

OP, honestly, thank you for being a respectful n00b.

this isnt my 1st forum, im a member of several. mostly motorcycle forums. i know its annoying sometimes when people ask the same question in 30 different ways so i can deal. this is a huge forum, and i mean i have not seen many forums with this many subforums. so it took me a little longer than usual to find some things. the links you guys have posted have been great and i'm learning alot and hopefully i can pass the knowledge along. the s4 i'm looking at buying is going with me to a dealer for an inspection today. the yard selling it is being quite cooperative in letting me dig at it so much.

[Wah]

share the knowledge.

+1

[morris400]

ok guys, yes some people do not search and yes rag on them for it, but treat this guy with some fucken respect cause he has more balls then most people, he serves his country and most people have no idea the commitment that it takes and how hard that job is. treat the guy with respect. from one military guy to the next, thanks for what you do.

[f3racer]

ok guys, yes some people do not search and yes rag on them for it, but treat this guy with some fucken respect cause he has more balls then most people, he serves his country and most people have no idea the commitment that it takes and how hard that job is. treat the guy with respect. from one military guy to the next, thanks for what you do.

thanks. i dont ask for respect because i am a soldier, but because i am a man 1st, soldier 2nd.

[Trigger Happy]

Its so beautiful to see all the S4 guys getting along