02_FNE
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Posts posted by 02_FNE
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was a great cruise, roughly 50 cars, good variety of cars and some brilliant driving..
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A bypass valve is a vacuum-actuated valve designed to release pressure in the intake system when the throttle is lifted or closed. This air pressure is recirculated back into the non pressurized end of the intake (before the turbo) but after the mass airflow sensor.
A blowoff valve does basically the same thing, but releases the air to the atmosphere. This creates a very distinctive sound. For some owners this is the only reason to get a blowoff valve.
The unique sound caused by a blowoff valve sometimes comes at a price. On a car the blowoff valve is mounted after the mass airflow sensor, so venting to atmosphere confuses the ECU. The ECU is told it has a specific amount of air in the intake system, and injects fuel accordingly. The amount of air released by the blowoff valve is not taken into consideration and the engine runs rich for a period of time. Engines with a manifold absolute pressure regulated ECU are not typically affected.
Typically this isn't a major issue, but sometimes it can lead to hesitation or stalling of the engine when the throttle is closed. This situation worsens with higher boost pressures. Eventually this can foul spark plugs and destroy the catalytic converter. When running rich, not all the fuel is properly burned in the cylinder which can allow unburned fuel to combust upon contact with and melt the converter or to cause incompletely combusted fuel to leave heavy carbon deposits.
Blowoff valves are used to prevent compressor surge. Compressor surge is a phenomenon that occurs when lifting off the throttle of a turbocharged car. When the throttle plate on a turbocharged engine running boost closes, high pressure in the intake system has nowhere to go. It is forced to travel back to the turbocharger in the form of a pressure wave. This results in the wheel rapidly decreasing speed and stalling. The driver will notice a fluttering air sound.
A blow-off-valve is connected by a vacuum hose to the intake manifold after the throttle plate. When the throttle is closed, manifold vacuum without pressure develops in the intake manifold after the throttle plate and sucks the blow off valve open. The excess pressure from the turbocharger is vented into the atmosphere or recirculated into the intake upstream of the compressor inlet.
I hope this clarifies any doubt you have as to it's purpose.
Later man!
thanks for the info, very helpful..
so why is there even a such thing as atmo bov's if all they really do is release the pressure causing problems?
is it also possible that by having the atmo bov's wound tight that way only allowing less amount of air pressure out?
and in my situation my car has been tuned but continues to run quite rich, however doesnt have bad fuel economy, just blows a bit out the back.. so if adding atmo bovs makes that happen usually and mine is already does that mean it could be made alot worse again by adding them..?
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Leave the bov's off or blocked.
Especially if you run a map based aftermarket ecu.
They are there for emissions and driveability, not for performance.
i run a power fc..
wat about all the talk about the pressure being put on the turbo propellers?
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GTR bov's are some of the best ever made...replacing these with anything would be a downgrade in my opinion.
what if you've just discovered that your gtr doesnt even have any bov's?
should i put standard ones on?
put the 2 aftermarket ones i have on?
leave it as is.?
what are the pros and cons of each of these?
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thank you. that pic helps..
and yeh ive been looking at the diagram above..
im just tryin to figure out exactly what i need to re fit the atmo bovs ive got..
so i know i dont need return lines..
so i just bolt them on as per originals would, then connect the hoses and wella?
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anyone got a pic of what the standard setuplooks like..
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There's gotta be more photos than that!???
By the way, anyone know how much was officially raised and how many cars turned up?
+2
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can you still get these rays wheels at all?
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just a reminder for northsiders, we are meeting at shell nudgee, and will depart at 7am sharp..
we will then cruise to the south meet and then on to yamanto..
cyas all there
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can anybody put me to a pic of what a standard setup looks like
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what i was told by looking at it now is that its all been completely removed for perhaps a decent single bov, but then if they removed that and now there is nothing..
cos the ones i bought are atmo does that mean i can just cut the sealed pipe and join mine and re join the lines and away it goes?
cos i wot need the return line..
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ok guys i need help.
full story, i have an r32 gtr and recently upgraded some parts including turbos..
so anyway at 1.2 bar im making 275kw at wheels, and was told i could make more but stock afm's and bov.s have maxed out
sjust purchased some atmo bee r bovs that bolt straight on,
so today i pulled my front bar off to replace old bovs with new and realised that my car hasnt even got any bovs, the pipe has been sealed and lines run back on themselves.. WTF? im confused and totally at a loss as what i should do?
after reading loads on here i dunno wether to just bolt the bovs on and it will be all good, or wat?
anyone know what the hell is going on and wi need to do?
i was under the impression that at high boost lvls i was leaking and that by putting these aftermarket ones on it would hold and makes boost fine..
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no dramas
ill be in my gtr and with a mate with his rex..
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haha fair enough..
come along to the cruise man and we ll meet up.. or if ya at the charity cruise sunday say g'day
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when u have the women mods bitchin at each other ready to rip each others hair out and a mod resigning because of personal conflicts
its not the most welcoming forum nor will it last long
specially if u keep the bitch's there and allow them to feel the need to over power people and create a small group on there and gang up against the other people on the forum.
lol
i here ya mate.. i dont want that shit either..
i just enjoy hangin out and cruisin with cool people, we have a bit of fun on there
and will get better, especialy if we can get more people on there like you and me..
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a bit like highrollers trying to keep 400hp cars only on their forums but allowing smaller people to cruise?
plus i heard there is A LOT of politics on this forum, specially between mods.
i guess you could say a bit like high rollers..
all cars and new members will be welcomed.. just have a look at the intro thread on the forum..
as for the polotics between mods, i am a mod on there and its only a new forum so its taken a bit to get it right but alls good now
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pics?
they arent there
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nah mate, its open to all that wish to enjoy a great day cruising and meeting people..
the forum is awd-turbo, but there are a few members that are without awd cars..
awd is the theme trying to be kept though.. or atleast a passion for them
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will be there of course..
last one was massive..
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Keen, be there in my evo if it goes ahead and i dont get stuffed over with work.
good stuff mate, cya there
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hey fineline you might wana add a coule more from here to mate
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i mentioned for northsiders to meet at shell nudgee..
few of us will be there and anyone else that wants to meet there
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hey guys, were in bris and goldy are you guys staying?
theres TNT on this coming wednesday at willowbank.
there an awesome cruise on next sunday for the bushfire appeal. if you guys are in bris id be more then happy to meet up with you guys..
and on thursdays we always have bit of a cruise on.
pm me with what you guys are doin and where you will be at.
im on he northside of bris and have an r32gtr
Corey
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too easy i will keep you posted on numbers.. and if anyone else would like to put there hand up to meet at shell nudgee just mention that in your post so we know how roughly how many.
and going by google maps it will take roughly an hour to get to yamanto from nudgee, so to make the 8-30am departure from yamanto i think its best we meet at 6-45 and depart at 7am giving us plenty of time to get to yamanto meet.
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Awd-turbo Cruise - 15th March
in Events
Posted
this is our route
we head up the sunshine coast
take steve irwin way exit
turn left towards beerwah and then head towards peachester on peachester road
follow it to the end and turn left/follow the road onto kilcoy beerwah road
follow that to the end (daguilar high way) turn right onto the highway
follow it upto and through kilcoy
turn left onto esk-kilcoy road
follow until wivenhoe-summerset dam road and turn left
follow that to brisbane valley highway and turn right
follow brisbane valley highway and turn right into hay road
follow hay road and turn left onto logan inlet road
LUNCH STOP
leave logan inlet turn right onto hay road
turn left onto brisbane valley highway
turn left onto wivenhoe dam- summerset dam rd
turn right onto mount glorious road
follow that all the way to samford village and then head for where ever you call home