Zip i have seen your post on here today and passed it by several times cause i have not personally performed the test you described..
but when i was At PAR racing engines this past fall, he ask me did i have a vaccum pump that all is stuff required one..he dyno's all his stuff and i am sure they can answer your Question without guessing.
if you would like their # i can pm you.
Scott Duggins (owner) or Brad will most likley answer the phone, if you speak with Scott feel free to use my name he knows me.
Brian
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Bjuice..
"I'M YOUR HUCKLEBERRY ! "