Do a quick search in Google for "reading spark plugs" should be able to sort out your issue by comparing the photos with your plugs.
My guess is, assuming you are using the correct fuel grade and proper plugs you have a fuel/air ratio problem most likely caused by that "hyper-charger" and not a timing issue since you have not indicated any type of performance problem. hesitation,knocking, running hot, idle issue, stalling, lack of power.
The thing is, if you cram more air in (hyper-charger) you alter you fuel/air ratio. I'm assuming a power commander is used to alter this fuel air ratio, and if you removed it you will be running too lean.
Are you sure the Power Commander was working before you took it out? Cause if it S*it the bed, or got out of adjustment ( lost it's MAP) then you will experience some problems.
I would remove that hyper charger, make sure you are running the correct tempature plugs. Then see if you still go through them every two weeks.
I run a stock '08 Nomad 1600 and only change plugs every 2 -3 years.
"Rust Never Sleeps" - Neil Young