What are everyones thoughts on doing the 4/7 swap and when to do it. I have noticed that a lot of engine builders don't really agree on why this does or doesn't help a particular engine, but the facts are that it sometimes does. I have also never heard of anyone doing it with a blown/forced induction motor, why, is it not as effective on a forced induction deal? I would just like to get a little chat going about this and see what everyones thoughts are on the subject. Thanks!