"Problem #2. You need to be able to keep all other parameters equal. Almost no one else seems to be able to do this. Change ONE thing and see the difference and Stick with it till you get the result."
Logically, that right there is the wrong approach. If you change the cam you have to change a lot of parameters along with the cam to compensate for the extra airflow that this cam will produce. If you don't, it is going to throw everything off and instead of gaining performance you might loose it. Also, all engines are not equal, a cam change in car A will have different results in car B even though the are using the same cam; after a cam change tuning is the key.
I've build a lot of engines, and that is one thing I emphasize, ONE item WILL NOT MAKE POWER! It is the combination of changes in the system to compensate for that ONE change that will make the difference.
My advice? Get the R5 cam and tune accordingly and you will not be disappointed!
Reinaldo Moloon