blow off valve

[crazygn]

My buddy gave me one of his blow off valves , can it be hooked up . now it sounds as if it is blowing off thru the air filter when i let off and this cant be good for the turbo. I was thinking of welding the little pipe on the intercooler pipe that go's to the TB and hose clamping it to it, then run a vac line to the intake where the two line come off my v2 intake.


do you guys think it will work.

 

[turbo buicks]

a few guys on this board run them i believe. the ones ive seen are mounted near the TB on the driverside of the inlet pipe. i hearyou have to have a flat surface to mount it to. i dont know exactly how you would run the lines. anyone who deals in turbo cars such as a local turbo shop dealer should be able to tell you how to run the lines or give you a set of instructions. you could look on the internetalso b/c im sure there are a few blowoff valve diagrams floating around out there in cyberspace. remember one guy complained that the lowest setting his BOV could go would still only blowoff pressure down to 5 psi. so you may still get a slight sneeze. HTH

 

[crazygn]

any one no where the vac line go's i guess any where on the vac block. How do these this work , when do they know to blow off the press.

 

[turbo buicks]

i THINK they go anywhere before and after the TB. when you stay on the gas the 2 areas are the same pressure but when you let off the gas the 2 areas become unbalanced. one side becomes a big vacuum and the other backs up w/boost and his change in pressures opens the valve to blowoff the excess pressure accumulated before the TB. once again i believe this is how itworks, its been a while since ive read anything about them. HTH

 

[speedy1320]

Most BOV's bolt to a FLAT flange on the intercooler. I have a stretch IC that has the flange, but since I have a stock turbo, I really do not need a BOV and I blocked it off. BOV's are for BIGGER turbos capable of producing more volume, and thereby potentially more damage to the turbine bearing when you take your foot OFF the gas.

How it works is simple. First of all, it should be adjustable so you can tune it to your specs. When you take your foot off the gas after running at full boost......at that very moment the boost pressure has NO where to go, other than backing up through the air filter {sneeze} At that very SAME moment, your car develops a ton of vacuum......so.....using this vacuum and routing it to the valve kind of "Times" the valve to open from the vacuum....and allowing the "locked" boost pressure to escape. As soon as you put your foot back on the gas, vacuum is reduced, the valve CLOSES.....pretty neat huh?

 

[crazygn]

So if i have the blow off on the pipe that go's in the TB and my vac line going to a vac that comes right off the intake that supplies vac to my vac block it should work right .

The problem i have is it seems to be pulling a little air like its in a vac at idle, and when i rev it it sucks air , but then blows it off when i let off the gas but most thru the air filter still.

the blow off is off a stock eclipse 96-97 i guess , could this be way its sucking air, is it to little and cant keep up with all the air the motor is sucking.

 

[crazygn]

I forgot the pictures if you guys want to look at them.

http://community.webshots.com/user/crazygn