dump valve or bov !!! whats your choice??
Iv tried Turbosmart Dualport, Baileys, HKS ssqv, now im back on the standard one. I dont miss the noise a bit and the car runs so much smother and actually idles properly now. Wish i never went down that route in the first place and wasted my time and money, but you live and learn.
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My Blobeye STi wears a Turbosmart Supersonic which is LOUD. It's also adjustable so you can select a soft drawn out release between gear changes or a big mad sudden rush.
I used to love it until last week when I fitted a Japspeed induction kit.
With the air box gone and the big pipe in its place, you can now hear the wastegate chatter which in my opinion sounds fantastic.
Unfortunately it's drowned out by the volume of the dump valve.
So, the original recirc' is going back on at the weekend and the Turbosmart Supersonic is going up for sale.
If anyone would like it, £80 should do it I think.
I used to love it until last week when I fitted a Japspeed induction kit.
With the air box gone and the big pipe in its place, you can now hear the wastegate chatter which in my opinion sounds fantastic.
Unfortunately it's drowned out by the volume of the dump valve.
So, the original recirc' is going back on at the weekend and the Turbosmart Supersonic is going up for sale.
If anyone would like it, £80 should do it I think.
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It's the over-fuelling and bore wash issues you can get with VTA dump valves (BOV or whatever) that would concern me. Stick to the Subaru re-circulating one and you'll have none of these issues.
Unless of course your sole objective in life is to make the teenage girls who hang around the Maccy D's car park on an evening go a bit moist over your Scooby-Do
Unless of course your sole objective in life is to make the teenage girls who hang around the Maccy D's car park on an evening go a bit moist over your Scooby-Do
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stay away from baileys their known to stick and not open properly........
as stated HKS are expensive but I have heard many complain about issues and as Harvey stated they can leak hindering mapping.
If the need for one is so great then turbosmart or forge would be best bet
as stated HKS are expensive but I have heard many complain about issues and as Harvey stated they can leak hindering mapping.
If the need for one is so great then turbosmart or forge would be best bet
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From: Dublin,Ireland
My Blobeye STi wears a Turbosmart Supersonic which is LOUD. It's also adjustable so you can select a soft drawn out release between gear changes or a big mad sudden rush.
I used to love it until last week when I fitted a Japspeed induction kit.
With the air box gone and the big pipe in its place, you can now hear the wastegate chatter which in my opinion sounds fantastic.
Unfortunately it's drowned out by the volume of the dump valve.
So, the original recirc' is going back on at the weekend and the Turbosmart Supersonic is going up for sale.
If anyone would like it, £80 should do it I think.
I used to love it until last week when I fitted a Japspeed induction kit.
With the air box gone and the big pipe in its place, you can now hear the wastegate chatter which in my opinion sounds fantastic.
Unfortunately it's drowned out by the volume of the dump valve.
So, the original recirc' is going back on at the weekend and the Turbosmart Supersonic is going up for sale.
If anyone would like it, £80 should do it I think.
Its not the waste gate "chattering" it air stalling the turbo and going across the compressors impeller when you close the throttle
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Iv tried Turbosmart Dualport, Baileys, HKS ssqv, now im back on the standard one. I dont miss the noise a bit and the car runs so much smother and actually idles properly now. Wish i never went down that route in the first place and wasted my time and money, but you live and learn.
I had the exact problem like nick type r! Had an exspensive BLITZ VTA on mine the car didnt feel right! Took it off after a week went back to standard runs smooth and idles properly! Sold it on fleabay lesson learnt standard is BEST
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I was quoting my local subaru specialist which is good enough for me. I'm happy to take his word over yours.
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From: Unit 21 Tafarnaubach Ind Est - Tredegar - NP22 3AA
I've been running a Blitz dump valve on my Type R for three years with no issues but my car has been mapped with an Apexi Power FC.
The brands I'd reccomend personally are HKS, Blitz, GFB and Forge. They are all decent quality pieces of kit, Tial come in handy if you're running high boost levels.
The brands I'd reccomend personally are HKS, Blitz, GFB and Forge. They are all decent quality pieces of kit, Tial come in handy if you're running high boost levels.
Here we go again! I love these threads!
I have HKS had it for a year now with no probs. IMO HKS is the loudest chirp rather than a shoosh noise. My brother had a Baileys on his RS Turbo and it did leak and get stuck after a while, Blitz seem to work better on higher boost setups.
If you want one, get one, personally I love the sound of a DV. As for it damaging ur engine/turbo, as said in the last thread like this, never heard of anyones turbo going bang due to a DV.
never heard of anyones turbo going bang due to a DV.
The purpose of the BOV is to release pressurised air in the system as the throttle body is shut from a boost position. The only place for this air to go without a dump valve is to slam back in to the turbo. The air charge shocks up against the compressor wheel trying to turn it in the opposite direction. In time the effect of this on a ballbearing turbo results in the need for a new cartridge. Expensive. It can be catastrophic in extreme cases with the compressor wheel disintegrating and self destructing turbo.
Never even experiment with this mod on a VF22 which already has grenade like tendancies.
Last edited by harvey; Jul 30, 2011 at 10:46 AM. Reason: bold to assist those that speed read
oh man ! i have a vf34 !! ive been told to run a standard recirculating so just spent 40 sheets on one ! now im being told that it could destroy my turbo ?! 
ive also been told that dump valves do not improve performance what so ever ? and the chat about keeping the turbo spooling is , quote "bollocks"
ive also been told that dump valves do not improve performance what so ever ? and the chat about keeping the turbo spooling is , quote "bollocks"
Last edited by initialD; Jul 28, 2011 at 05:01 PM.
oh man ! i have a vf34 !! ive been told to run a standard recirculating so just spent 40 sheets on one ! now im being told that it could destroy my turbo ?!
ive also been told that dump valves do not improve performance what so ever ? and the chat about keeping the turbo spooling is , quote "bollocks"
ive also been told that dump valves do not improve performance what so ever ? and the chat about keeping the turbo spooling is , quote "bollocks"
Dumpvalve VTA (vent to atmos)
Dumpvalve Recirc (recirculates pressurised air)
Dumpvalve delete can prematurely damage turbos
Can will run better with the factory recirc
end of HTH
initiald, running a standard recirc valve is fine .... youve done the right thing! And personally your leagues ahead of most people that go psshhhhhhhhhtttt.
Its the people who run with no pressure releif system of any kind that get into trouble! And anybody who refers to wastegate chatter .... well .... its not the wastegate chattering, its excessive pressures trying to eat your turbo!
the way i see it is in the case of people running mafless, the excess pressure is dumped to the atmospheric side of the compressor wether theyve got recirc or atmospheric, therefore the only difference is that with an atmospheric you get a lorry air brakes impression every gearchange! ..... supergay if theres no other reason than wanting to make noise! But as harvey said earlyer, if your mafless and getting the recirc pipework in is a nightmare, then its not so supergay as its a plumbing issue, not a drawing attention to yourself issue!
For those running mafs (most people that are tuning on a budget) the need for a pssshhhhhh (cos its badass innit bruv), is going to let air escape that has been metered by the maf and therefore your opening yourself up to fueling and running issues.
If im wrong, anyone who knows theyre bananas please correct me (harvey! :-)
Its the people who run with no pressure releif system of any kind that get into trouble! And anybody who refers to wastegate chatter .... well .... its not the wastegate chattering, its excessive pressures trying to eat your turbo!
the way i see it is in the case of people running mafless, the excess pressure is dumped to the atmospheric side of the compressor wether theyve got recirc or atmospheric, therefore the only difference is that with an atmospheric you get a lorry air brakes impression every gearchange! ..... supergay if theres no other reason than wanting to make noise! But as harvey said earlyer, if your mafless and getting the recirc pipework in is a nightmare, then its not so supergay as its a plumbing issue, not a drawing attention to yourself issue!
For those running mafs (most people that are tuning on a budget) the need for a pssshhhhhh (cos its badass innit bruv), is going to let air escape that has been metered by the maf and therefore your opening yourself up to fueling and running issues.
If im wrong, anyone who knows theyre bananas please correct me (harvey! :-)
oh man ! i have a vf34 !! ive been told to run a standard recirculating so just spent 40 sheets on one ! now im being told that it could destroy my turbo ?!
ive also been told that dump valves do not improve performance what so ever ? and the chat about keeping the turbo spooling is , quote "bollocks"
ive also been told that dump valves do not improve performance what so ever ? and the chat about keeping the turbo spooling is , quote "bollocks"
