Hey guys. I have a project ive ben wanting to do for a while. I found a picture online of a guy who did something similar with his fit. My question is how do I test how much can block withou effecting radiator flow? I want to block enough to actually get some gains but not go past the point of not being able to drive 75 with ac on a hundred degree day if need be. Its not quite spring yet so odds are by using tape to test i could probably block the whole thing and get away with it till summer. But if you guys have done the math or figured it out for yourselves i might save myself the headache.