WOOOOOOOOO! I must have misunderstood the question, I didn't realize we were talking SLICKS!, OOPS!
Oh yea, slicks can work great underinflated, but i use that word as a reference, actually slicks work best when PROPERLY inflated, and here's how to do that.
Next time at the track, inflate them to well above a psi you know is high, make a pass, keep lowering your pressure until you blow them away, launching at the same rpm each time, track conditions will play, but that is beyond your control, weather as well as the day heats up.
Check out
www.autotrader.com for sub $30K Vipers, little damage, easy repair.
The 488 is an amazing motor, i wish you all could feel it.