best vented bov 25psi+

[lars y]

Hi,
im trying to figure out what bov to get. i will be running 25psi+ and venting to atmosphere. i dont fully understand wich bov would be best for me, do i need a 'big' and expensive bov or does it not matter? when i look at the bovs in the stores it never says what psi they are rated, how does this work?

also, i have a greddy type s, from the previous owner, could i use that one or isnt it big enough?

 

[canada4g63]

Tial BOV.

 

[Sebba]

Tial BOV.

Absolutely.

 

[lars y]

i read that thread where people say what brand bov they reccomend, but thats not what im asking, im asking how do i know what bov works best with a certain amount of boost, or doesnt the boost matter at all?, its all about what brand you want and the sound of it?

 

[Sebba]

Certain types of BOV are better suited to high boost levels, the Tial is an all around performer.

 

[lars y]

ah ok, thanks ill look into that one

 

[Tiki2777]

My hks bov holds 25 psi easily, and it is great even with much less psi. (I love the dual diaphragm flutter at about 10-12 psi or less ) I am pretty happy that I went with it over greddy, but most people don't realize greddy makes a good bov but the old type s is OLD , someone say worn diaphragm, and their other more performance oriented bov not for sick tight sound yo are better. A tial is way to expensive for my tastes and doesn't sound good either IMHO. I think they are hard to recirc too...

 

[TJCTalon]

I have Tial Q on both of my talons. I wont go back to another BOV if I had to.

Absolutly love the sound, way better the the squeek of HKS. Plus everyone and there mother has HKS bov's.

 

[habitatguy187]

My crushed 1g bov held 30psi on a boost leak test. Sounded great at 24psi as well imo.

 

[nuclearr]

I am in a similar boat except I am looking for a recirculate BOV until I can go SD. My crushed 1g will not hold more than 20 psi (its off my old 90, 89 production date)

 

[lars y]

thanks for the input

the hks and the tial are the same price, and i wont be recirculating.
1g are nice and cheap but i cant get hold of one here, and i would rather have a new bov.

 

[daren_p]

My vote would be Tial, if you can vent. I have owned 5 other BOV's & I would recommend the Tial, hands down, for both performance (holding boost) & also best driveability (not surging under part throttle conditions).

For Tial, you pick a spring based on the amount of vacuum you see at idle (with a warm car).

 

[lars y]

yeah about the vacuum daren_p, im not done building the engine yet, so i have no way of knowing what the vacuum will be. and i need a bov before i can start it. is there some sort of standard here i can start out with?

thanks

 

[daren_p]

Your best bet would be to take a guess at what kind of vacuum the car will see when running (the Tial springs do have a range, so you don't have to be bang on).

Main thing, what displacement & cam you plan on running? Also what idle rpm? People with similar setups should be able to chime in & let you know what kind of vacuum they see at idle.

I guess also, what is your elevation above sea level.

 

[jpmxrider489]

I have a tial and it's worth the money.

 

[rr06rs]

Tial QR. There is none better. And when you go SD, you don't have to buy another, you can purchase just the valve body to switch it out with the recirculating piece and then sell it easily to someone looking to recirculate their Tial till the go SD, just like you did. Brand new tials are $240 so I wouldn't really call that expensive. Not to mention, you can get them used for about $150. Hks is rice. Sounds like a baby bird that just fell out of its nest.....cute... Lol

 

[lars y]

2L. stage 2 brian crower. 8,3:1 cr. about right at sea level. rpm im not sure about yet, prob normal (750?)

edit
rr06rs: i am running sd

 

[rr06rs]

2L. stage 2 brian crower. 8,3:1 cr. about right at sea level. rpm im not sure about yet, prob normal (750?)

edit
rr06rs: i am running sd

Sorry, that response was for Nuclear that posted. But yes, I'd recommend a Tial for you also, unrecirculated.

 

[lars y]

oh ok, well look slike most people are reccomending the tial.

can all you who are running tial tell me what spring you are running it with?

 

[Boomdeeze]

My vote would be Tial, if you can vent. I have owned 5 other BOV's & I would recommend the Tial, hands down, for both performance (holding boost) & also best driveability (not surging under part throttle conditions).

For Tial, you pick a spring based on the amount of vacuum you see at idle (with a warm car).

I see for the spring rates they have -12 - -15 and -16 - -19, My car usually has -16 but can vary a little. What would happen if my car was running -15 but I had the -16 spring?

 

[lars y]

i guess the bov would release later. but i assume you can compensate by adjusting the screw on the bov?

edit: meant later, i think..

 

[wahl]

Tial

 

[slayer450]

I see for the spring rates they have -12 - -15 and -16 - -19, My car usually has -16 but can vary a little. What would happen if my car was running -15 but I had the -16 spring?

Do they go to -20?

 

[Lou98GSX]

i run a 1g with the leak proof upgrade . so far no problems at 27psi

 

[Boomdeeze]

Do they go to -20?

Here are the different spring rates they offer:

0 to -7 in/HG (or supercharger) use 3 PSI Spring (Pink)
-8 to -11 in/HG use 6 PSI Spring (Black)
-12 to -15 in/HG use 8 PSI Spring (White)
-16 to -19 in/HG use 10 PSI Spring (Silver)
-20 to -21 in/HG use 11 PSI Spring (Purple)