you may want to try a few more trips to the strip before really modifying anything. Few months ago I went on a TNT night and couldn't get any traction at all, had to leave the line at a crawl before i could punch it. Few weeks ago, same track on another TNT night (different tires but the same kind) and I had no issues launching at 5k on the 2 step. Would have set it to 6k but my laptop wouldn't recognize the serial cable for the WOTBOX.
Point is, the trip I made a few months ago had me debating all kinds of changes and thinking the airlift was killing my times...now i see the airlift and my current set up will hold just fine if the track is prepped decent. If your blowing the tires off, either the track is shit or the tires are shit.