BOV Placement, GO!

[spikesnstuff0905]

I want to see something other than the obvious (right before the 3000 pipe). I'm thinking about welding a flange onto the piping right as it exits the ICclose to the grill/ground so the sound can still be heard clearly. Mine is recirc. so it's not quite as scary as i'd like it to be in it's current position.

 

[A. Jay]

Wait, is it gonna still be recirculated after moving it?

 

[spikesnstuff0905]

Why wouldn't it be? If i wanted to stop it from recirculating i would just take the hose off and make it 3x louder. lol I'll just make the hose to my intake a little longer depending on the final location.

 

[A. Jay]

The valve doesn't make noise, you're hearing the air rushing in the intake and you're hearing it from an opening in the intake; your filter.

You can't just vent the abv to atmosphere if the air has been metered before hand, it'll stall the engine.

Also, performance is more scary then loud noises.

- from my Archos 5 IT

 

[spikesnstuff0905]

0.0 The noise from your BOV definitely comes from... your BOV. Thats why HKS makes inserts for it.
I vented my BOV to atmosphere for a few months at 9psi and never had a problem, or boost lag. (I'm Auto)
I was looking for pictures of BOV locations not opinions, no offense.

 

[hvyman]

Have you yet realized that if you placed the bov closer to the intake that that would be the best place from a performance stand point?

 

[Devin LeBlanc]

The valve doesn't make noise, you're hearing the air rushing in the intake and you're hearing it from an opening in the intake; your filter.

You can't just vent the abv to atmosphere if the air has been metered before hand, it'll stall the engine.

Also, performance is more scary then loud noises.

- from my Archos 5 IT

Fail :nono:

 

[spikesnstuff0905]

Yeah, less area to re-pressurize and whatnot, but i really don't see it being as bad as usual in my personal situation. Usually you would want it near the throttle plate so that when you let off it stops the negative pressure wave close to the source, and every time you shift you would have to re pressurize all the piping after the BOV. In my personal situation, i never have to let go of the gas, because i don't have to shift, so the only time i experience boost lag is from a stop or when i'm feathering the gas. Either way, i'm not very worried about it.

 

[hvyman]

Wtf. Are you running a constant variable trans or something that doesnt shift?

Even autos let off between shifts. Not as long as manuals but they do. Also there are 7sec mk4 6 speeds out there and the person is shifting faster than an auto.

You should be thinking about your turbo which is the reason for your bov. If thaT is not a concern than do what ever you want and place it where you want.

Bov placement is not a cool factor.

 

[Devin LeBlanc]

If your at WOT and the transmission shifts you don't loose boost.. I hold solid 14 lbs durning WOT pulls until I let off, I build boost off the line with the auto so I start at 5-7lbs and the minute I launch im at 14 lbs until the race is over.

 

[hvyman]

As soon as the trans shift your rpm drops and the vacuum starts. You loose boost but not much at all. Only thing auto has over manual.

If you didnt loose boost you wouldnt hear bov between shifts and you do.

 

[spikesnstuff0905]

*Well since you told me to place it closer to my intake, putting it either A) before the turbo:/ OR B) Right next to the compressor housing, which would be BAD since the point of least resistance would then mean that all of the pressurized air in my lines would be moving BACKWARDS, back towards my turbo to get out the BOV, and when i did spool back up i would have to first reverse the direction of the previous charge air, and then re-pressurize the entire system i don't think placing it a few inches away from the exit of my IC is such a bad idea.
*The difference is when using a manual gearbox during normal driving, no one is slamming gears, meaning your throttle is usually fully closed for at least a half second or so in between shifts, stopping the charge air entirely and forcing it to flow out the BOV. In an auto (like mine) even while shifting, my throttle plate is never fully closed while accelerating, because i never have to let off the accelerator, so little to no charge air needs to escape during shifts.
*Thats insane, and i'd like to see a vid.
*Getting more done with less work is ALWAYS a cool factor. My lower IC pipe split yesterday and i ordered an IC kit. Since i have to spend the day fabbing, cutting, welding, and test fitting the pipes anyways, i might as well move my BOV now rather than later.

0.0 The noise from your BOV definitely comes from... your BOV. Thats why HKS makes inserts for it.
I vented my BOV to atmosphere for a few months at 9psi and never had a problem, or boost lag. (I'm Auto)
I was looking for pictures of BOV locations not opinions, no offense.

Since people can't read tonight.

 

[hvyman]

Place it where ever you want. you want pics find them.

since you didnt read placing the bov closer to the turbo just makes it work harder. read, search, learn, post.

 

[Poodles]

As soon as the trans shift your rpm drops and the vacuum starts. You loose boost but not much at all. Only thing auto has over manual.

If you didnt loose boost you wouldnt hear bov between shifts and you do.

No, as the throttle never closes, and no you don't hear an auto blowoff between shifts.

Now, to the OP, if you want it louder, don't recirculate. By moving the valve further away from the intake (where you're actually hearing most of the sound) not only are you probably going to hear it LESS, but you're going to impede the ability for the BOV to recirculate the air possibly causing stumbling or compressor surge.

If it's not recirculated, then put it wherever you want.

 

[Devin LeBlanc]

My blow off valve does not open during a whole run until I let off the throttle, the trans slipping during a shift keeps a load on the engine so boost is still present.. Just saying

Pic of placement on mine

 

[spikesnstuff0905]

Hvy: Since YOU told me to place it closer to the INTAKE, which would be closer to the turbo, Re-read what you yourself posted. You don't control any of the other members actions just because you're sour, and you boycotting my thread won't stop everyone else from posting ^^^ as above.

Poodles: I am running a gReddy type S, and it is recirculated. I would like to keep it this way, so no matter where i put it i'll be routing the hose back into the intake.

Devin: That seems to be the most common location, but i have seen a few mk3's with the BOV below the fender, and i know that some scooby guys actually mount them on the intercooler itself. My current location is retarded, the PO didn't want to get hard lines or have anything welded, so i have a length of heater hose clamped to the original BOV location on the 3000 pipe, with the Trust BOV dangling on the other end. It was also venting to atmosphere when i got it, but i had a SS intake welded up to replace my old one (PO had the original recirc. port JB welded shut) and it is now recirculating. I have 2.5" hard lines on the way after rupturing my lower IC line yesterday, so i would like to have the BOV where i want it officially before i start cutting/welding.

 

[hvyman]

Intake as intake manifold. you cant run a bov on the intake inlet to turbo. If you cared at all you would have searched and known.

And no shit i can only write for my self. How odd. Your post alone sounds like straight rice as it is.

 

[spikesnstuff0905]

Arguing about what's rice and what isn't is just as ignorant as arguing over music. Just because you don't like something doesn't make it bad. If you want to make your car exactly like everyone else's, by all means go ahead. I did search, that's why i know what i know. You didn't say intake manifold, you said intake. Judging by some of the ignorance other members have posted in this thread so far, i couldn't be too sure if it was a typo or not. Do you seriously think i would consider placing a bypass valve in a location to vent air that has yet to be pressurized? If you cared at all your motor would have been properly built and you probably wouldn't have a BHG right now. Once more, since it's obvious that you can't read: Either post a picture, or kindly leave this thread. I'm sure that there are plenty of other imbeciles on here for you to play with.

 

[hvyman]

Lol you dont know shit about me nor my car so why bring that up. Since you want to know i fixed it. Dont care to change sig. I forgot sigs were so important.

2nd you will never offend me.

3rd i always hear of bov being placed in the intake since i had a supra since 2005. You haven't?

 

[spikesnstuff0905]

How many BOV's have you seen placed inside of intake manifolds since 2005? Care to rethink that again?