BOV vac hookup

[spyderdrifter]

I got this knock off bov a couple years ago with a pipe kit for a previous eclipse and never used it. I'm gonna throw it on my spyder as a temp until I get an HKS bov. I'm assuming the top nipple runs to the intake manifold, but where does the bottom run to? I've never felt with 2 lines on 1 bov. I capped the bottom one for now. Is that right?

 

[mchustle]

I just have mine vented. I've seen it vented like mine, bottom nipple tee'd with the top, and the bottom nipple ran to the turbo charge/intake pipe. I think it is suppose to go to the charge pipe, I have personally done all of the above ways and nothing seemed different anytime.

 

[spyderdrifter]

So would keeping it capped be wrong? What is the extra nipple really for?

 

[mchustle]

The extra nipple is to help prevent compressor surge by allowing the bov to open faster. Some also say it makes it hold less boost. Here is a link where there are a couple more people "talking" about it. http://www.dsmtuners.com/forums/newbie-forum/226671-lower-bov-nipple-uses.html

 

[spyderdrifter]

Well I feel retarded for starting this post. When I made the title, it didn't give me good links to search through. But I've been searching since my last questions and found the info here: http://www.dsmtuners.com/forums/newbie-forum/224445-greddy-type-s-bov-nipple-question.html. Looks like I'll be pulling the cap back off.

Your link helps confirm it all. Thanks for the info

One more question though, since I'm not sure if I'm following all the info right. If I leave the nipple vented, I need to tighten the screw on top? And vis-versa, if routed to say the I/C piping, I can loosen the screw?