I have some new tires, and at high speed the car feels like its got softer springs. It feels like there is alot more body roll now basically.

I assume this is because I have new tread on the tires and the tread blocks flex more than my old 730's did yes?

 

In a straight line?

What tires?

 

no while making lane changes. In a straight line they feel slightly underinflated. I'm going to fix that immediatly though.

S03's at 32psi.

 

size?

 

stock size

 

Add more air pressure and see from there.

 

new tires always have less grip than the same tires that have been worn down. The worn tires are closer to being slicks, and like you said the tread blocks flex less than new tires.

 

added some pressure, now running 36 front and 34 rear. Those pressures worked well for the 730's and I'll see for the new tires

 

I've noticed the same thing - I relplaced my stock tires with Toyo Proxies FZ4s P205/55/15. Great tires, but it does feel a little bouncy sometimes.

Any suggestions on pressure for these?

I was thinking of the S-03s, but I need something that'll move in the snow.

 

ooooh, I can't wait for all this snow to be gone. I want to get my S-03s