I was thinking about this in the shower this morning. (Yes, I am kind of a geek.)
When a diapgragm-type valve's housing expands, it will just stretch the diaphragm to its new dimensions. Uniform expansion of the piston, housing and o-rings are very unlikely in the piston design.
Maybe they've worked around this... but a room-temperature fishtank is not where a wastegate works every day.
also I'd be interested in seing how they 'filter' the air coming in the bov, I wouldn't want any dust or whatever coming in the engine.
And if you think a simple filter would do it, then wouldn't it also partly 'block' the quick release of air?
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Quote:
Originally Posted by SophieSleeps
But I think for most people "fine" is usually good enough.
For power hungry people "fine" isn't going to cut it.
also I'd be interested in seing how they 'filter' the air coming in the bov, I wouldn't want any dust or whatever coming in the engine.
And if you think a simple filter would do it, then wouldn't it also partly 'block' the quick release of air?
A BOV is not supposed to allow air in.... and yes, the first time you blew off boost it would be an unhappy scene for the filter.
-Justin
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A BOV is not supposed to allow air in.... and yes, the first time you blew off boost it would be an unhappy scene for the filter.
-Justin
well theirs does - hence it's suppose to remove the 'lag' seen from vaccum in a turbo application. Since you're pulling air from it, just like a short-ram or something....
__________________
Never argue with an idiot; they'll drag you down to their level and beat you with experience
Quote:
Originally Posted by SophieSleeps
But I think for most people "fine" is usually good enough.
For power hungry people "fine" isn't going to cut it.
If it was open under vaccum then you could never build boost. Can't be. BTW, a vaccum turns the impeller the same way as exhaust pressure...Re-Circulation design wouldn't suck air in?
Look at the video, and tell me it's not always open and sucking air in, until you blip the throttle, which lessens the negative vaccum in the intake manifold, at which point it closes.
__________________
Never argue with an idiot; they'll drag you down to their level and beat you with experience
Quote:
Originally Posted by SophieSleeps
But I think for most people "fine" is usually good enough.
For power hungry people "fine" isn't going to cut it.
well theirs does - hence it's suppose to remove the 'lag' seen from vaccum in a turbo application. Since you're pulling air from it, just like a short-ram or something....
If they designed the thing that way, I wouldn't buy a screwdriver from them.
Any application using a MAF could not use this valve - well, you could... but your car would run like crap.
-Justin
__________________
Every last conviction, I smoked them all away
and I drank my frustrations down the drain out of the way.
Most people don't run blow-through... and those that do would probably not want unfiltered air going to it. I do know what you're saying though.
-Justin
well i guess i'm ressurecting an old thread since i'm probably going with this BOV. Synchronic makes an "anti-stall" kit for the BOV which prevents the BOV from letting in unmetered air. It is then your option if you run MAF to recirc the blown-off air.
my engine setup is MAF so i'll be getting the anti-stall kit. i'm not sure if i'll recirc it yet, we'll see how the motor performs between shifts.
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I watched the different Youtube videos of this thing in action for an hour & was thinkin' WTF...?
how can they design/run it OPEN so it is drawing in unfiltered air...???? even at idle...??
I could NEVER put that on my car...
Then i was thinking...If this BOV is placed in the IC tubing before the MAF sensor, & it is Recirced to blow off into the intake pipe before the SC & after the filter, like it should be for an SC.......then when the BOV is OPEN like when it is idling inb the video....it will draw in FILTERED air from the FILTERED air in the intake tube...basically the reverse of what happens when it releases pressure...
SOOO... i guess it would work ok... for me...
but still... if you DIDN'T recirc it..... then it IS drawing in infiltered air at idle......NOT GOOD Imo... & not something that could be installed after a MAF sensor in a MAF based intake system.....
& what happens when there is no pressure in the system like when the car is off... is that thing open & now a point where any & all kinds of crap might be able to make it into the IC pipe...? bugs...? dirt...? water...?
i dunno..... still a few key reservations on my end......& i think i could use it without those issues.
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