going with PCV as they have been around for a while. actual dyno tuning will be a while
1. Modifying the stock box won't bring much, possibly create issues. Some people have drilled holes in them, some did some strange things with them trying to re-create a tube setup.
When you modify the intake you will need a controller. PVC is the best one in my opinion, but you can also get a PCiii, wiseco, etc. for cheap.
So modifying the box before getting a controller is a tad backassward. Get the controller 1st and modify the settings as you start with other mods.
If money is an issue, try an [email protected]
or Lloydz intake for a steel frame, same thing. Get a ATS maybe first .after that a PCV
. Then graduate to an intake, then pipes.
Easy things now would be to remove the cats, pull the 02 connectors and use a higher flow filter like a [email protected]
In fact I have 2 doing nothing.
I also have a wiseco controller I'll sell cheap.
In the future you can add cams and torque tube ( both highly recommended! ) and have the whole shebang. Without the tubes and cams I was running just over 100 HP with the setup without cams.
Screwing with the intake may be cheaper but when it starts acting up or not giving any real performance, and popping the exhaust...you will be wanting to move up anyway.
But starting with an airflow change and no controller will run the bike like crap. You can lose low end on it as well.
Do it right, even if piece by piece. You wont regret the end results.