A few questions on the tial BOV

[fastezz]

OK first off does it use a hks flange I recall hearing that somewhere, also would it be ok at 15psi, I dont want to have problems with compressor surge. How loud is it compared tot he greddy type S?
Thanks
Ryan

 

[Mitchel63]

It doesn't really sound like this is the BOV for you! I've never heard anything about them using the same flange as the HKS but I have never seen an HKS flange. 15psi will barely open that sucker! And it hardly makes any noise at all......just a cough. Don't buy this valve for the sound, buy it if you need to hold crazy amounts of boost.

 

[blcknspo0ln]

yep, from what i've gathered TiAL's are used only for high boost applications only. mainly because they come with high pressure springs.

get what's proven: SSQV [ recirc. ] , type s , 1g , etc.

 

[fastezz]

OK first off I am running MAF-t, and also I am running 20psi daily but on long trips I turn it down to 15psi, thats why I was wondering, I recall seeing the tial BOV on some honda turbo kits, they usually run 6-8psi out of the box?
Ryan

 

[blcknspo0ln]

i believe they came with .7 bar springs if requested.. you should contact a dealer and ask. if that's the case.. then 15 psi should be no problem.

 

[gixrman]

I have one and its very . but it hold boost like no other. I run 20psi and the only problem i have is low boost flutter.

 

[Turbo 2g awd]

I have the Tial with the 11psi spring in it, its how I ordered it from Slowboy. I love it but got it cause I run 24psi plus on my FP3065. It is not as loud as a Greddy S it is more of a whoooosh sound.

 

[Mirage2LTurbo]

yep, from what i've gathered TiAL's are used only for high boost applications only. mainly because they come with high pressure springs.

get what's proven: SSQV [ recirc. ] , type s , 1g , etc.

Gathering from your two posts, you have no idea how a BOV works.

You can run a 4psi spring in the blowoff and still hold 35lbs just fine. It's a pressure differential. When you hookup the vacuum lines, that is what determines when it opens. When your throttle body slams shut, and your manifold goes into vacuum, the the difference between your manifold and charge pipe is greater than 4psi, the BOV will open. Same concept for the (Not 100% sure on these, but they do offer 3 springs) 11 and 22psi spring Tial offers in them.

Tial is the best BOV you can buy, hands down.

Also to the other guy above saying his BOV won't open on 15psi, maybe you should have a shop look at it and make sure you didn't install it wrong. Mine (and most BOV's) fluctuate open at idle.

 

[Black94TSI]

Just remember you can't recirculate a tial, and your car will run like ass if you're still on a MAF. It doesn't use the HKS flange.

 

[Mitchel63]

I never said anything about MY BOV not opening at 15psi.....I run considerably more boost than that and have no problem opening the BOV. Simply saying that I feel this is a BOV to use in high boost applications.

 

[fastezz]

Well like I said up there I am running MAFT with 3" gm MAF blowthorugh, I want the tial because I have alwaws heard its is the best BOV hands down and because I heard it in driven to on the silver 1g and it dounded bad ass, im just getting a little tired of the type s sound especially the HKS, I mean I still like it but I wish it could just be a little deeper, and then I heard the TIAL.
Ryan

 

[NDgsx]

Cars pulling -18in hg should use the 9psi spring. Cars with large cams and less vacuum should run the 7psi spring.

 

[fastezz]

I hate to say it but the BOV in driven 2 sounded liek the one on the skyline in 2f2f, its sounded bad ass.
Ryan

 

[1bad92awd]

The Tial sounds pretty good, you can hear a clip on shepracing.com on his talon. It makes a crazy noise, comperable to the skyline in 2fast 2furious. It is a bov that is capable of holding tons of boost. a couple of friends i know work at a shop and have had problems with other bovs. My friend blew up an RFL on 24psi. HKS ssqv, and the tial are 2 really good ones. If you want one that sounds really good even on low boost, just get a ssqv.

 

[boostcreep]

I have one and its very . but it hold boost like no other. I run 20psi and the only problem i have is low boost flutter.

I'm running into the flutter problem as well. I've upgraded to a Garrett and am considering installing a Tial on Friday. My flutter problem only happens when there is throttle variations under boost (i.e. half throttle to 1/4 throttle of vice versa). Ocassionally this occurs at wide open or going to wide open but rare.

You can run a 4psi spring in the blowoff and still hold 35lbs just fine. It's a pressure differential.

Couple questions.

What is the 1G spring rated at?
What would be a good spring for a 20G sized turbo (running no more than 22 psi)? Please keep in mind the flutter issue...

 

[Mirage2LTurbo]

I'm running into the flutter problem as well. I've upgraded to a Garrett and am considering installing a Tial on Friday. My flutter problem only happens when there is throttle variations under boost (i.e. half throttle to 1/4 throttle of vice versa). Ocassionally this occurs at wide open or going to wide open but rare.

You can run a 4psi spring in the blowoff and still hold 35lbs just fine. It's a pressure differential.

Couple questions.

What is the 1G spring rated at?
What would be a good spring for a 20G sized turbo (running no more than 22 psi)? Please keep in mind the flutter issue...

That's not a problem, they are supposed to open at partial throttle. Please read above where I explained how they work.

 

[SpoOLxExO]

The Tial sounds pretty good, you can hear a clip on shepracing.com on his talon. It makes a crazy noise, comperable to the skyline in 2fast 2furious. It is a bov that is capable of holding tons of boost. a couple of friends i know work at a shop and have had problems with other bovs. My friend blew up an RFL on 24psi. HKS ssqv, and the tial are 2 really good ones. If you want one that sounds really good even on low boost, just get a ssqv.

The Tial has been adapted to "street" cars, but in all actuality it is a hands-down RACE Valve.

1bad92awd has a good point. ALL BOV's, even stock ones sound different at certain pressure levels.

At 15psi my SSQV sounds like a bottle rocket, but at 25+ it sounds like someone beating a baby seal with a stick! :laugh:

The Tial only has one HUGE 50mm valve. So like the TurboXS BOV's, they cause compressor surge (What some of you call "Flutter") at most street boost levels.

The SSQV is unlike any other valve on the market, as it has 2 valves. The main valve, which is a "push" type. This means the more boost you run, the harder it will seal.

The HKS valve also has another "pull" type valve, that is easily released under light-load conditions. This eliminates "flutter" when driving around at part throttle/ low boost.

Also Tial Valves use Tial Flanges, Hks valves use HKS flanges. And the Greddy Type-s does not sound like an HKS SSQV.

 

[boostcreep]

So for my application the SSQV is the ticket for the surge issue correct?

 

[1bad92awd]

The SSQV is a quality blow off valve. It sounds very good and very loud. The Tial will most likely just sound like a puff of air at any low boost pressure. Its not a bad blow off valve at all, i guess it comes down to your taste in sound really. And just for referance, yes each blow off valve uses its own flange. The only one i know is compatable is the greddy type s, the new greddy type rs and the 1g bov's, they all can mount to the same flange. The tial flange however, because of its ability to hold such high boost needs to be welded to the flange for proper install.

 

[arash15]

you'll get mass amounts of compressor surge. you can run this bov with such low boost.
got to this link. it will solve all your problems. http://www.roadraceengineering.com/tialbov.htm

 

[boostcreep]

you'll get mass amounts of compressor surge. you can run this bov with such low boost.
got to this link. it will solve all your problems. http://www.roadraceengineering.com/tialbov.htm

So your saying that the SSQV will more likely not fix the problem than the tial. I think there is a misconception on the BOV issue (atleast for me). I'm not concerned with sound. It does not put you in front of the pack. I'm more concerned with operation than anything. It could be pond scum green colored with a bird whistle attached. As long as it works in the fashion to minimize my fluttering problem. So again your saying that the tial will more than likely fix it than the SSQV?

 

[Drag_S13]

The fluttering you are getting is NORMAL! Partial throttle boost will do that on ANY turbo car. Venting the BOV only makes this problem worse on MAF cars. This *fluttering* is actually compressor surge, and the only option to *fixing* this is running a harder or softer spring. A softer spring will just open more and just vent everything unless you are on it, and a harder spring just won't open until you have significant boost built.

 

[Mirage2LTurbo]

The fluttering you are getting is NORMAL! Partial throttle boost will do that on ANY turbo car. Venting the BOV only makes this problem worse on MAF cars. This *fluttering* is actually compressor surge, and the only option to *fixing* this is running a harder or softer spring. A softer spring will just open more and just vent everything unless you are on it, and a harder spring just won't open until you have significant boost built.

I think I've already said that what, 3 times above?

Get the Tial BOV. Best one out there, hands down. Looks the best too, very clean.

 

[Scrymerr]

I think I've already said that what, 3 times above?

Get the Tial BOV. Best one out there, hands down. Looks the best too, very clean.

Yes.

Ryan, go with what Mirage said. If the Tial were rediculously expensive, I would suggest running something a little cheaper. However at about $200 brand new ($220 with steel flange that we can use to make you custom IC piping) you cannot beat the price. The Tial is rock solid, and I have had no more flutter with it than I did my Type-S. Trust me, the Tial kicks ass.

 

[GSX4LIFE]

You are correct Mirage2LTurbo The "flutter" is compressor surge and is audible most of the time under very low boost conditions. I get surge, at times, with no boost reading on the guage. No big deal. Compressor surge at anything under 8psi is not damaging to the turbo.

On to the topic at hand. Guys, lots of bad information being thrown around. I actually made it my mission to test several BOVs and these are my findings.

1st Gen valve: Great valve. Perfect for almost everyone. Works even better with the "Angry Pigeon" mod(high boost mod).

Greddy type S: Horrible piece of crap. Surged at anything under 10psi, opened(and surged) at anything over 20psi. Took it apart and siliconed the diaphram(eventhough it wasnt torn). Valave worked better, but the damage had been done. Left a bad taste in my mouth.

Turbo XS RFL: What a complete piece of dog dookie! Nuf said!

HKS SSQV: looked and sounded promising from the revues. Turned out to be nothing more than a failed hoop dream. 2nd worst valve I have tested. Surge at any boost level. Didnt flow nearly enough to keep from surging with a the larger turbo I was using. Also caused my car to stall when quick on/off throttle occurred. Didnt like adapting the larger hose needed from the manifold to that non-existant excuse for a nipple on the SSQV(Had to use a goofy ass looking reducer.

"Oh, and before you HKS supporters go up in arms, I had the SSQV apart. All seals were thoroughly checked. Valve was pressure tested. Pistons were checked for binding and lubricated. Spring and seat were checked for obstruction. The valve, mechanically, was fine."

Tial: I had been through so many valves at this point, I didnt know what to think. I was planning on going back to the 1st Gen, but I figured, since I was getting the MAFT, I would give this valve a chance. What a SAVIOR! This valve did exactly what it was supposed to do. And it did it extrememly well...with no gimmicks.., No duel drives, adjustable springs or giant air horns. No, sequential this or Rally FU##ING Loud that. It simply worked with no user input or adjustment... Hmm, where have I seen that before? Oh yeah. The 1st Gen. It works like the 1st Gen, and vents enough air for giant turbos.

So to end this really long post that was brought about by bad info, 2 valaves I would put my money on. Get a 1st gen if you have to recirculate. If you have to recirculate and are running a very big turbo, do the high boost mod on the 1st gen. Get a a Tial if you can vent. Simple as that.