DIY tuning Software/ECU ???
 

Is there a DIY tuning ECU/software setup that I can buy at reasonable cost? I do not have access to a Subaru tuner or rolling road (in Jersey) and I will be tinkering with my car soon (StiV). I wish to be able to use software to program the ECU & get advice/feedback based on diagnostic traces ....

What diagnostics device would you recommend (if the ECU package does not have sufficient info for this task)?

Indeed, Is is possible to realistically do this myself?

Cheers
Paul