Advise me a BlowOff please

[xenophobic]

Not sure lots of you like it but I will install,can you advise me a blowoff?

[R_Rated]

I would advise a diverter valve instead. A blow off with trigger a CEL.

[s60rdood]

Greddy Type S....if you can find one, they are no longer made.....sounds like wind-chimes when it blows off....

Here's a link so you can hear it...

http://videos.streetfire.net/s...1.htm

[stevectsai]

the one that sounds like a whistle? it would be ricey

[phuz]

Quote, originally posted by R_Rated »

I would advise a diverter valve instead. A blow off with trigger a CEL.

if you want a BOV, you will need one that remains closed at idle, or like josh said, you will throw CEL's all day long.

[oliverbe]

Can you explain the diverter valve? Does it still make a sound?

[phuz]

Quote, originally posted by oliverbe »

Can you explain the diverter valve? Does it still make a sound?

just like your stock one does...maybe louder.

[adigit]

I think it really is up to you, cause all BOV does the same thing... You should just pick 1 that you think looks the best.

Or maybe 1 that matches the engine bay better.

I've used Greddy, Apexi, HKS, Blitz, all sound different, and the sound will change depending on the pound you set. And to make adjusting "sound" difficult, it sounds different for different cars with different mods.

I had a Apexi on my FC3S RX7 and my friend has the same BOV on his Eclipse GSX, we set it at the same pound but when it releases, the 2 car sounds drastically different...

So My suggestion would be just pick 1 that you think looks the best!

Good luck!

[Cicada]

Quote, originally posted by phuz »

if you want a BOV, you will need one that remains closed at idle, or like josh said, you will throw CEL's all day long.

unless you use a blanking plate where the original CBV was, correct?

[Cicada]

most people like the HKS SSQV, but it also "whistles" and i think it sounds ricey.

i, personally like the tial BOV, and if i decide to install a BOV, that's what i'd go with. sounds really nice.

http://www.maxpowertuning.com/tialbovsound.WMV

[Selman]

Are Blowoffs harmful for volvo's, doesn't it? I heard something like this before on this forum.

[phuz]

Quote, originally posted by Selman »

Are Blowoffs harmful for volvo's, doesn't it? I heard something like this before on this forum.

if its the kind that remains open at idle, it will suck in un-metered air and cause the ECU to throw a CEL.

[xenophobic]

Quote, originally posted by Cicada »

unless you use a blanking plate where the original CBV was, correct?

Which ones close at idle then?

[phuz]

Quote, originally posted by xenophobic »

Which ones close at idle then?

when i had a turboxs type-h, it remained closed at idle.
i believe its the dual-piston type.
just do a google search regarding blow off valves and MAF sensors.

[s60rdood]

Any "piston" type BOV's stay closed at idle...HKS SSQV, TIAL, Synapse......Diaphram ones tend to leak or "blow open" under high boost. They do have an adjustment nut and spring to take care of that, but then it makes you wonder if you have it tightened too much and if it's fully opening when you let off the gas.

[phuz]

Quote, originally posted by s60rdood »

Any "piston" type BOV's stay closed at idle...HKS SSQV, TIAL, Synapse......Diaphram ones tend to leak or "blow open" under high boost. They do have an adjustment nut and spring to take care of that, but then it makes you wonder if you have it tightened too much and if it's fully opening when you let off the gas.

exactly.
a piston type will keep the same amount of boost on the "charge" side of the BOV as the piston side, keeping the whole thing in equilibrium, so you can run 50psi, and it sees it on both sides so it doesn't budge, but as soon as you let off the gas, you have high-vacuum on the piston side and high boost on the charge side, and it forces the piston open.

[xenophobic]

Quote, originally posted by phuz »

exactly. a piston type will keep the same amount of boost on the "charge" side of the BOV as the piston side, keeping the whole thing in equilibrium, so you can run 50psi, and it sees it on both sides so it doesn't budge, but as soon as you let off the gas, you have high-vacuum on the piston side and high boost on the charge side, and it forces the piston open.

It is easy to find HKS here and I will try that.

If the car throw CEL,any damage and etc,send the bill to you!

[phuz]

Quote, originally posted by xenophobic »

It is easy to find HKS here and I will try that. If the car throw CEL,any damage and etc,send the bill to you!

i will PM you my address. rofl.

[Cicada]

i'm going with the TIAL..at the end of all my other mods, of course. woudlnt want my car to simply 'sound fast'.

[xenophobic]

Quote, originally posted by phuz »

i will PM you my address. rofl.

Thanks

[xenophobic]

http://www.wotm.com/tialbovs.html

I will order one of these,is this the right one?

Or this can be too or not?

http://www.2kracing.com/produc.../4849

Thanks.

[R_Rated]

This is what I use:

http://www.gmpperformance.com/...13967

[R_Rated]

[xenophobic]

R_Rated,is this a BOV?Seems like something different...

[phuz]

Quote, originally posted by xenophobic »

R_Rated,is this a BOV?Seems like something different...

its just an aftermarket recirc valve. similar to the stock one, but MUCH nicer.

[R_Rated]

The "technical" term is diverter valve and some refer to it as a "compressor bypass valve".... either way, it acts as a BOV only recirculates the air back through the system.

[phuz]

Quote, originally posted by R_Rated »

The "technical" term is diverter valve and some refer to it as a "compressor bypass valve".... either way, it acts as a BOV only recirculates the air back through the system.

josh, is yours any louder than the stock "diverter" ?

[R_Rated]

Quote, originally posted by phuz »

josh, is yours any louder than the stock "diverter" ?

that is not a fair question.... all bets are off with the different turbo. This one almost sounds like a flutter BOV. It is quieter than the standard Bosch unit. It is the least abrassive one i could find. The thing I like the most and reason I bought it is that this one metal and not plastic, has a piston instead of a spring and is VERY quick and percise. It is alittle more than most but when the best is only 20 bucks more than the average it is a no brainer.

[phuz]

didn't know if you had ever compared the two. the turbo itself isn't going to change the sound of the BOV (or diverter)...its the amount of boost pressure once it opens. i assume one like yours would sound somewhat louder vs. the stock model.

[R_Rated]

Quote, originally posted by phuz »

didn't know if you had ever compared the two. the turbo itself isn't going to change the sound of the BOV (or diverter)...its the amount of boost pressure once it opens. i assume one like yours would sound somewhat louder vs. the stock model.

then yeah it is louder than stock but I am running much higher boost levels. and a completely different turbo and not just a bigger version of the stock one.

[xenophobic]

Can that be used with a BOV together?

[phuz]

Quote, originally posted by xenophobic »

Can that be used with a BOV together?

you could, but if they are in two separate locations, you are going to get some weird air-flow patterns in the chargepipe and possibly defeat the purpose of a BOV in the first place.

[digital_dreamer]

So, what are the advantages of a aftermarket BOV or diverter? Sound? Response time?
Fill me in. I'm all for mods.

regards,
MAJ

[phuz]

Quote, originally posted by digital_dreamer »

So, what are the advantages of a aftermarket BOV or diverter? Sound? Response time? Fill me in. I'm all for mods. regards, MAJ

i haven't truly researched any numbers behind BOVs and diverter valves, but sound is the most popular reason for adding/replacing one. i would also guess that some of them have a quicker reaction time as well as capability to discharge more air than others, and therefore taking that backpressure off the impeller.