Alwright, getting a little frustrated with the Greddy Type-S on my new Turbo.

[Lord Khan]

All you have to do is hook up the top fitting and cap the lower nipple. Pull the screw all the way out and it will hold as much boost as you give it.

I've never seen any intructions that said anything about capping that nipple. It's either leave it unhooked, or hook it up to that turbo nipple for the BOV to open easier for a more smooth blow-off. These instructions came with the Greddy. The one for leaving it open was on their website, but I've never seen anything about capping it.

 

[WSU99GSX]

I think we can all agree on one thing...do not cap it, either leave it open, or attach it to the compressor housing.

 

[98spydert]

Does anyone have the page bookmarked where someone made an auto cad image of the geddy bov and explained the inner workings of the "second nipple"?

Basically, the vacume source from the manifold pulls on a diaphram inside which in turn pulls the valve off it's seat allowing the charge from the uicp to escape through the 1 1/4 inch opening. When you hook up that smaller nipple to a boost source, pressure pushes on the diaphram from the opposite side. The air pushing on the opposite side doesn't go anywhere though so hooking up that smaller nipple will not cause a boost leak or cause boost to bleed off IF adjusted right. Since you have the "push" and the "pull" on the same diaphram instead of just the pull, you must adjust the valve to compensate. i.e. turn the screw to the "harder" position until boost no longer bleeds off under full boost.

 

[98spydert]

All you have to do is hook up the top fitting and cap the lower nipple. Pull the screw all the way out and it will hold as much boost as you give it.

If you do this it will hold as much boost as you can give it, but it will not open or be extremly hard to open once the throttle closes. So... don't do it.