Yea, with no interior, I'm in a prepared class -- pretty much anything goes. No budget for an LSD this year, though.

The STB does serve as a perfect mounting point for that zip-tied hose to the blower!

 

Exactly what I was thinking

 

Just pointing out here -- have you tested the car for the effect of each change you made? Doesn't sound like it. Sounds more like you made a bunch of changes all at once.

This is complicated by the fact that (as you allude to), making one change (like the spring stiffness) can possibly change the effectiveness of another change (like chassis stiffness). So you can't test for the effect of each one just by doing them one at a time. But you can test for their effects if you are a little more clever about it and do a properly designed experiment.

Or you could just say "the car is really fast right now" and not mess with it, assuming it is fast enough.