As far as i know the best way to test your plugs and view jetting is to do a WOT throttle drop test. But its kinda hard to do in the confines of our great city. But fret no more. Come spring you can now test your settings. The spot is the very long stretch of road that runs along the entrance side of Prospect Park Zoo. There are no intersections or lights for quite a bit (at least 500 feet or more). And if you go between rush hours there are little to no other cars. Its on Flatbush Ave btw Grand Army Plaza and Empire Blvd.