I didn't even understand the first question.
For the 2nd guy, be very careful when installing a wet kit. When we did my buddy's wet kit on his 328 everythign ran great until all of the sudden he bent a valve in his 5th cylinder. Although you may think it will help keeping from leaning out you must remember to follow procedure properly. our problem we we installed the injection site in the throttle body about .75" too close to the manifold so that cylinders 1,2,3 ran rich and 4,5,6 ran lean, causing the spark plug tip to melt off and hit an exhaust valve. fuel entered closer to cyl 1 2 3 and nitrous entered closer to 4 5 6 and without enough time for them to mix before entering the manifold it caused the problem. in any case if you must go nitrous direct port is the best method
1995 BMW M3 Turbo - Dakar/Black