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Old 06-28-2006, 12:19 AM   #26
circaisdashiat
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ok i need to clear this up for me, sorry im a nub.
if the turbo spools up during acceleration and then when you release the gas pedal and close the throttle the turbo should still be spinning, de-accelerating but still spinning. so air is still being forced into the intake, building pressure. what if your blow off was venting the same amount of air (into the atmosphere) as the turbo is pushing into the intake? wouldnt that not alter the PSI rating what so ever in the intake? plus when you let off the gas pedal, it doesnt not matter what the MAF sensor is reading because its not going to be injecting any fuel into the pistons anyways?
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Old 06-28-2006, 12:29 AM   #27
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Quote:
Originally Posted by circaisdashiat
ok i need to clear this up for me, sorry im a nub.
if the turbo spools up during acceleration and then when you release the gas pedal and close the throttle the turbo should still be spinning, de-accelerating but still spinning. so air is still being forced into the intake, building pressure. what if your blow off was venting the same amount of air (into the atmosphere) as the turbo is pushing into the intake? wouldnt that not alter the PSI rating what so ever in the intake? plus when you let off the gas pedal, it doesnt not matter what the MAF sensor is reading because its not going to be injecting any fuel into the pistons anyways?
You are always injecting fuel into the cyls, what do you think makes the car idle? And once the maf has read the air coming in, it is going to inject fuel for that air, regardless of the throttle position.

If you had no bpv or bov, when the throttle plate closed the air pressure would hit it, create a shockwave that would slam pressure back into the compressor blades in the turbo.
SO you lift off the gas, the throttle plate closes, and INSTANTLY there is vacuum in the manifold (because all the boost pressure in it has been eaten up by the motor, and what the turbo is still making is in the pre throttle intake tract) and that vacuum sucks the valve open. The valve is on the pre throttle side of the intake tract, so that boost pressure gets vented out before it slaps back into the compressor blades.
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Old 06-28-2006, 03:00 AM   #28
circaisdashiat
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so are you saying that if it vented out (into the atmosphere) jsut enough to stop the shockwave then the engine would never run rich? why would they make an atmospheric BOV if they always make you lose power and waste gas?
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Old 06-28-2006, 03:31 AM   #29
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Quote:
Originally Posted by circaisdashiat
so are you saying that if it vented out (into the atmosphere) jsut enough to stop the shockwave then the engine would never run rich? why would they make an atmospheric BOV if they always make you lose power and waste gas?
They sound cool and people continue to buy them. Also, not all engine management tunes for recirc.

They make and sell a metric ton of throttle body spacers for fuel injected vehicles that do not one bit of good at all. Why? Because they can.
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Old 06-28-2006, 02:36 PM   #30
circaisdashiat
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hahaha ok thanks, its a bit clearer for me now.
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Old 06-29-2006, 03:30 AM   #31
circaisdashiat
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What about Hybrid BOV's are those better than the stock BPV or does it not do anything either?
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Old 06-29-2006, 03:38 AM   #32
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what's the difference between the hybrid and the rest of the BOV? I dont see any unless your making alot of boost and yet the air need's to be recirculate not vented
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Old 06-29-2006, 09:33 AM   #33
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Hybrids are discussed in the main post folks. They suck just like regular BOVs. If you want noise part of the time, get one.
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Old 06-30-2006, 10:24 AM   #34
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Default Rich Fuel

With the BPV's re-using the air, is the fuel still as rich as using the BOV's?
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Old 07-07-2006, 05:03 PM   #35
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bump...
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Old 07-07-2006, 06:00 PM   #36
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bump because there are 6 topics in this particular forum all asking about damn bov's
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Old 07-07-2006, 06:17 PM   #37
EvolvedAK
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bump to make this a permanant sticky
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Old 07-07-2006, 06:28 PM   #38
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Bump, put it at the top dagnabbit! This is ridiculous!

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Old 07-07-2006, 06:32 PM   #39
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Quote:
Originally Posted by Petrus
Bump, put it at the top dagnabbit! This is ridiculous!

yeah its Fu**ing insane!!! like i said its a freaking plague!! WTF!
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Old 07-07-2006, 06:50 PM   #40
athakur999
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Nick needs to make the manifesto required reading as a criteria for registration on this board. You'll have to pass a 20 question test before you're allowed to post
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Old 07-07-2006, 07:19 PM   #41
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bump again. keep this at the top
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Old 07-07-2006, 07:23 PM   #42
veightkiller
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bump for all the people thinking about getting one!
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Old 07-07-2006, 08:01 PM   #43
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never let this thread die
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Old 07-07-2006, 09:53 PM   #44
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For the sake of mankind

BUMP
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Old 07-07-2006, 11:15 PM   #45
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Quote:
Originally Posted by enXiks
BUMP FOR 2006wrxWagon

kthx
YES!!! BUMP FOR STICKY WITH BIG RED LETTERS!!!!
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Old 07-07-2006, 11:17 PM   #46
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Old 07-07-2006, 11:41 PM   #47
DZKSTI
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the mod for holding more boost is only for wrx's and not sti's? can you get the sti to hold more boost?
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Old 07-07-2006, 11:51 PM   #48
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There should be a letter that all new members have to read before they get a log in name that states, "THE SEARCH BUTTON IS THERE FOR A REASON"
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Old 07-08-2006, 01:24 AM   #49
DZKSTI
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i did a search and no resaults where found..so can i get more boost out of the stock one or not?
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Old 07-08-2006, 11:47 AM   #50
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Quote:
Originally Posted by biker921
With the BPV's re-using the air, is the fuel still as rich as using the BOV's?
No. You need to read the post again. BPV/BOV that 100% recirculates = 100% fine. Anything else = rich.
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