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best sounding blow-off valve?

coco69

By coco69,
in General Automotive Discussion

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  • 2 weeks later...
TTT Grand Master

TTT

Posted
Posted

for all of you in here that are saying your bovs flutter.. you are mistaken.

that is not your bov making the fluttering sound.. It is CAUSING the fluttering sound, but not making it..

If the bov doesn't open at low boost, the air doesn't come out with a normal psshh or squeek in the HKS ones, it goes back through the turbo and goes.. ffftt tt tt tt tt tt

And someone mentioned the turbo the WRX rally cars use..

Rally cars do not use Bov's..

That sound is still the sound caused by the air going back through the turbo, but when you add anti lag to it and different intercoolers and turbo blades and so on, it has that weird high pitched fluttering sound.

I had the R2D2 on mine and it was runing rich.

so I put the standard thing back on. I didn't like how it would have a constant sssssssssssssssss sound on cruise sort of loads so I now have a GFB plumback one which just makes a weird muffled FFTT HHHHHHHH sound on gear changes.

I personally like the sound of the HKS SSQ bov but I don't like having a full atmo venting bov.. the car just doesn't feel right..

ROY, I don't think that that white supra from the Best motoring video had a bov did it? it was making a really loud fluttering/skidding sound..

Silver-Arrowz Grand Master

Silver-Arrowz

Posted
Posted
Originally posted by DR GTR

Twin Blitz ON a GTR is wicked. Its sounds like a monster

Werd!

Awesome when you lift off throttle slowly at high boost! Hear both go off one after the other.

:werd:

PranK Grand Master

PranK

Posted
Posted

i had a blitz mounted right next to my 'cooler on the '33 - anybody that heard it could confirm that it was INSANELY loud (you could hear it from the other end of the harbour tunnel)...

I have a brand new blitz on the 180, it is set really tight because i am still running standard boost, but will soon test it out once i get more stuff on there.

MicK51 Community Regular

MicK51

Posted
Posted

i reckon the sound my pod filter makes is loud enough... nice and legal too :D

it makes a nice psshhhhhhhh noise when ya come off the throttle, i looked at the factory BOV and it looks like it would flow more than enough air for the boost i'm running.

51jay runs 14psi through his factory turbo at the track and the standard BOV holds its boost just as well as the GFB hybrid one he has now.

At what point is a BOV actually required, i will probably run about a bar through my turbo when i get a boost controller. Is there really need for a aftermarkt BOV at that level?

Guest U ZCREAM

Guest U ZCREAM

Posted
Posted
Originally posted by Strich9ine

Blitz SUCK ASS...

I have one and it leaks, causes stalling problems etc.. how do I adjust this thing ????

Yea you need to adjust the spring cuz you're letting too much air out causing the engine to stall.

My vote for best BOV is Blitz. The apexi is good cuz of the price, but some have been recalled cuz they sometimes detach from the flange while driving :eek:

Plus they can't hold much boost and rust over the years

TTT Grand Master

TTT

Posted
Posted
i reckon the sound my pod filter makes is loud enough... nice and legal too  

it makes a nice psshhhhhhhh noise when ya come off the throttle

...ummm.. pod filters are ILLEGAL for street use..

So you might not get fined for the stock bov but you WILL for the pod filter.

Unless you paid a couple of hundred buck extra to get an engineers certificate saying that your pod filter meets all the regulations..

Dr_Drift Veteran

Dr_Drift

Posted
Posted
Originally posted by GTST

 

...ummm..  pod filters are ILLEGAL for street use..

So you might not get fined for the stock bov but you WILL for the pod filter.

Unless you paid a couple of hundred buck extra to get an engineers certificate saying that your pod filter meets all the regulations..

Not all pod filters are illegal... Paper non oiled (like simota etc) are fine... it's only oiled ones like K&N or HKS etc.. that are illegal due to the oil entering the atmosphere as an unknown pollutant.... I know it's BS but thats the rules....

Doc.

whatsisname Grand Master

whatsisname

Posted
Posted

Another handy side feature of running a MAP based ECU - no potential atmo BOV related AFM/stalling issues :D

Mick51,

The factory GTS-t / GTS25t BOV can flow more than enough air *up to a point* I never had a drama with my standard BOV until about the 220+rwkw mark. It wasn't that the valve leaked, it just wasn't able to flow enough air, which resulted in compressor surge (fluttering sound - NOT good).

I now use a GFB "Basic" It's cheap & outflows almost all the other GFB BOV's (& quite a few others!). After all the whole point of a BOV is to dump pressurised air on closed throttle, so the BOV's CFM rating is what really counts!

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