[nitefrost]

Just like it says, if i'm driving and shift at like 3-3.5k (i usually shift at 2k) or let some boost build up, as soon as i go off throttle and on the clutch i hear a "PPFfffffffffwhoosshh" kinda sound, kinda sounds like a cheap BOV but it's all stock, so i thought "hmm it recirculates not vents, do i have some sort of air leak some were?" . and frankly i have no idea how to find it and, atm kinda short on money to take it to a mechanic, and tips or suggestions, is this bad or will it be fine if i leave it? its an o8 wrx sedan thanks in advance

 

[GarrettKoonsman]

It could very well be the normal sound. Yes the stock valve recirculates back into the intake but you can still hear that. It very well could be a leak though. Check the BPV and its recirc hose to see if there are any noticeable leaks

 

[nitefrost]

all right thanks, and i've been driving it for bout a month now and it's just the first time i've heard it, so i was worried, but yeah, thanks

 

[Monk_Knight]

Do you have the stock heatshield on still? I don't have one since I have an aftermarket downpipe and I get a similar sound when I shift at high rpms

 

[eacooperusmc]

thats weird, I have the same thing. I have an '02 and its all stock except for the cold air intake. I was told that it was just the BOV releasing the pressure. I assumed thats what it was because Im pretty new so I obviously dont know a whole lot about them.

 

[GarrettKoonsman]

thats weird, I have the same thing. I have an '02 and its all stock except for the cold air intake. I was told that it was just the BOV releasing the pressure. I assumed thats what it was because Im pretty new so I obviously dont know a whole lot about them.

With an intake there is a good chance it is really just you hearing the BPV releasing pressure, intake will make that sound much more pronounced

 

[nitefrost]

Do you have the stock heatshield on still? I don't have one since I have an aftermarket downpipe and I get a similar sound when I shift at high rpms

yeah, everythings stock

 

[eacooperusmc]

With an intake there is a good chance it is really just you hearing the BPV releasing pressure, intake will make that sound much more pronounced

Ok, thanks. Reading this had me thinking.

 

[ArkySTI88]

Just like it says, if i'm driving and shift at like 3-3.5k (i usually shift at 2k)

My question is why are you shifting at 2k? I dont know about WRXs but in my STi its darn near impossible for me to shift it at that low RPM without getting some lugging. Granted I am new to manual transmissions and there may be something I'm missing at shifting that low.

 

[Monk_Knight]

My car doesn't like it much either (03 WRX). I'll usually shift at or a bit above 3k if I'm driving chill around town.

 

[zax]

My question is why are you shifting at 2k? I dont know about WRXs but in my STi its darn near impossible for me to shift it at that low RPM without getting some lugging. Granted I am new to manual transmissions and there may be something I'm missing at shifting that low.

Bahaha you think it's bad on your STi? Try driving a Bugeye... the 2.0L puts down almost zero torque until the turbo spools at ~3500 RPM (stock).

 

[nitefrost]

My question is why are you shifting at 2k? I dont know about WRXs but in my STi its darn near impossible for me to shift it at that low RPM without getting some lugging. Granted I am new to manual transmissions and there may be something I'm missing at shifting that low.

it's just the way i was taught, and it's my first stick as well, i consider it my first REAL car, but anyways i double clutch in, like i hit neutral first, rev a bit, then shift, and i do so at 2k to try and save gas

 

[ArkySTI88]

Bahaha you think it's bad on your STi? Try driving a Bugeye... the 2.0L puts down almost zero torque until the turbo spools at ~3500 RPM (stock).

Haha I can only imagine!

 

[GarrettKoonsman]

but anyways i double clutch in, like i hit neutral first, rev a bit, then shift, and i do so at 2k to try and save gas

Thats completely unnecessary, you have synchros for a reason.

 

[fishsniper]

The only time I rev match is when I am downshifting.

 

[bradsorensen]

yep double clutch when up shifting and rpm match when down shifting. that's how the pros do it!

 

[GarrettKoonsman]

For daily driving it is pointless especially on a stock tranny

 

[Mikie13]

For daily driving it is pointless especially on a stock tranny

This.

OP...what year is your WRX? Its also very possible you could have a snorkus delete or something like that, even if it is stock. That would make the stock BPV and blow-off surge more audible. But this is only the case with 02-07 WRXs...

 

[zax]

Thats completely unnecessary, you have synchros for a reason.

Admittedly I double clutch and heal-toe everything as well lol

 

[nitefrost]

Thats completely unnecessary, you have synchros for a reason.

meh probabaly i learned on an older car so it's just habit, and it makes it feel smoother