Don't start opening that can of worms. .....
There are tables on the US 350Z site about how much more air you need etc etc, then you have th UK suck it and see approach along with mucho derision of the Yanks thinking you need more etc etc etc etc it's simply put a bloody nightmare...
But fyi 37 all round as 35 was grinding the rims on these god awful british roads
It's not a can of worms at all. In fact I am trying to help you.
You have asked for help and that's what I am doing.
One of the causes of floating or wallowing, is to little pressure in the tyres.
Bouncing around is to much pressure.
Sorry to have helped you.!!
Wasn't a criticism of you or your offer of help it's just the whole tyre pressure issue has been done to death over many threads and that is what I was alluding to , sorry if I've offended you in any way, was never my intention