I have a tubocharged b-series motor on 3psi. of boost with an ebay blow-off valve but i got an HKS ssqv that i would like to replaced it with. First, would it be a direct swap over meaning all I that is needed is welding on the flange and using the same vacuum line as before( t-piece coming from the intake manifold also used for boost gauge) and no tuning? will it be worth it? is 3lbs enough boost to open the valve as i believe the new model hks is self-adjustable? when I fist got the hks valve it was on a greddy piping from an rsx so i manage to rig it up to where i could go from ebay larger piping to greddy smaller piping using some couplers to see if i could check that it worked but it seem not to want to fully open and did not sound like a bov at all. When I went to switch back over to my ebay bov my motor kept revving up and down and i thought i had mess it up until after a couple of starts it was o.k. Could it be the change in piping diameter that cause it not to function correctly? I have been told that is what caused it to act the way it did but i do not want to pay to get it weld on and it not work on my car ek civic and have to go back to ebay bov. The hks bov is functioning correctly from what the mechanic said and i would just like to have a name brand bov over ebay. Any help will be greatly appreciated!!! Thanks for checking me out

 

why on earth are you running 3psi?

 

b20b block stock sleeves are very likely to crack since they are not made for race use so 3psi for a safe daily driver until i have enough money to get some race sleeves like darton and golden eagle.

 

Alright, My eyes hurt after reading that.. perhaps some separation between thoughts/paragraphs would make it easier to read. Re-post and simply+clearly state your questions.

whats the fancy over the HKS bov? To each his own i guess. Typically brand BOV's are designed for race related application. Meaning they have stiffer bypass valve springs (for high pressure or "boost"). Most come with adjustment nuts to vary the spring stiffness ultimately allowing you to accommodate a lower boost level. 3psi may not be enough pressure to move the valve. Your ebay one may have a softer spring and is why it works over the SSQ

3psi is kinda funny man. Quick lesson, cracking of your block is typically due to rapid change in temperature (temp. flux) and it is called thermal shock. If you were to say start up your car in cold weather and hammer on it (cold to hot) it may crack. Even more likely would be hot to cold. Your running really hard and then shut down. Your probably safe with 3-5psi daily driven. An intercooler may also help you lower your charge temperature, making your system less prone to thermal shock.