Does anyone happen to know if having the boost gauge hooked up to the nipple on the upper intake manifold near the runners where it bolts to the lower intake manifold would show vacuum at idle, and if so, how much?

 

You're talking about the vacuum connection spot for the pressure sensor right???

I typically show around 17 inchs at idle and up to 25-26 on lift throttle there on my boost/vac gauge.

 

Well, the pressure sensor usually gets hooked up to the ACV, but I have no ACV, however on the UIM near the runners where the two intakes bolt together (upper & lower) there is a nipple commonly used for hooking up blow off valves, and that's currently where I have it hooked up, however I'm seeing exactly 0 at idle (though I do see boost on it) so I'm asuming I should plug it in elsewhere.

 

I teeded it in between the intake manifold and the boost sensor.

I have a streetported TII engine and it runns about 13-14" of HG.

James