They are one of the best boost controllers out there
BUT an absolute mare to get set up
You can do loads of things with the boost
You can set your boost for each gear like stock in 1st overboost for 2nd & 3rd then back down to stock again.
Good for 1/4 sprinting
You need to fit it then go and find a "PRIVATE" road and do some 3rd & th gear flat out runs so it will know what your boost settins are, then you can play about with the duty %
Not too sure about upping your boost on a revo map though so this would be best suited to a custom map or unichip IMO.