BOV install/vac lines

[nello]

A little confused here....got my turbonetics raptor from RPM today and l see two vac line inserts on it. One I understand goes to the throttle body, and the other, well that's the one I don't understand. It came w/ a sub-par diagram (cause it's not sy specific :lol: ) showing the other vac line coming from the turbo itself. Anybody else have the raptor installed?

I'll try and get some pics of the diagram up soon. Thank's everyone.

 

[MyNewSy005]

Re: BOV install/vac lines

Thats an interesting set up. I have a Turbo XS and it only needs one vac line that can come from either the intake or in my case its teed off the adj. fuel pressure regulator. havent seen one with 2 ports.

 

[NJ93TY]

Re: BOV install/vac lines

I believe they are both vacuum ports. One is to help it open when the trottle snaps shut, and one is to help it close. I had a Greddy Type S BOV and it had 2 ports. I never had it hooked to my truck.

 

[nello]

Re: BOV install/vac lines

Some pics:

Look at the last two pics carefully, seems like it was manufactured unevenly maybe? Note the bottom left pic has excess metal hanging out. I hope this doesn't affect performance. Lemme know what you guys think, especially the vac line hookup, thanks.

 

[MIGHTYMOUSE]

Re: BOV install/vac lines

a lot of large valves have a two port set up. i have one on my car 'godzilla' valve.

at a minimum hook up the one that gets vacuum. that will suck the valve open , the other port as shown SHOULD go to a boost only source to BLOW the valve open at the same time as it is sucked open from the other side for faster response.

under wide open there should be nearly equal pressure on both side, blowing it closed and blowing it open. set the spring pressure to adjust 'cracking' pressure of the valve