Nitto420s 305/40/22 tires pressures for racing ?'s

[DetailsUnlimited]

You don't have to remind me these are heavy (85lbs each)SOB to be racing with but I got them for a really great price! So the front have 50 psi and rear have 45. They just look to thin to take psi out? What would be a safe psi to run or if anyone has this setup give me some advise. TNT last weekend I was cutting 1.72 60' with said psi. Thx for any input.

 

[hondarider552]

I have 305/45/22's with same tires, I ran 30 front and 26psi rear.

 

[TLyons90]

Last time I ran I had 305/50-20s and did 35 all the way around... This time on my 285s I am gonna try 30 and 25!

 

[Harbin_22]

On my 285/50/20 proxes, I was around 28-30 front and 20-22 rear. Cut some mid 1.6's that way but it was 1/8 mile. Not sure I would run 120 with that pressure