[Lenny5160]

That's pretty high, but not crazy. Lowering the pressure will slow your reactions, but there isn't a ton there if you are keeping the pressure within reason.

I run 32-35 psi in my 3600# Super Street car. I typically bracket race it, and use starting line RPM to adjust reaction rather than tire pressure.

I can't tell if your question is:

1. I run 40 psi in my tires and I think it might be too high, but what will happen to my reaction times if I lower the pressure?

2. I need to slow my reaction times. Will lowering the pressure in my front tires accomplish this?

If #1, I'd probably drop 5 psi and you likely won't notice the difference. If #2, I'd still drop 5 psi, but you'll get more change in R/T through RPM adjustment or rear tire pressure.