555 RII Tire pressure

[injuner]

I will be heading to the dragstrip for the first time with my 555RII's on Thursday. What tire pressures do you guys run with these tires? I figure since they aren't drag radials I should probably be running 32 pounds or so? Am I way off?

[rutiger]

with my r2s i went as low as 18psi at the strip. i also ran at various psi in the low-mid 20s. the pressure changes never seemed to make any difference. what seems to make the difference on the r2 (and r) is the heat. if you do a real good burnout they will grab much better.

my 2 cents

[Richard Branca]

What were your 60 foots w/ the RIIs?

[ZO6 AL-X]

I haven't taken my Nittos to the track. But, I would try something around 15 psi. They *do* need heat.

Alex

[briann510]

Not sure on the Nittos, but on our other drag car we went from 14/16/18/20/22 psi and had no differences in 0-60 foot times between those numbers. These were drag radials though.

[robz]

Originally Posted by injuner

I will be heading to the dragstrip for the first time with my 555RII's on Thursday. What tire pressures do you guys run with these tires? I figure since they aren't drag radials I should probably be running 32 pounds or so? Am I way off?

Lower tire pressure works great for drag tires. But these aren't and have stiff sidewalls. I have run them at 14 psi with no stabilitly issues. They don't make good launch tires but stick alot better than stock from a roll. I ran a few 1.8x's in about 4 passes on them but these are my street tires. With 430 rwhp I basically spun right thru the 1-2 and quite a bit on the 2-3.

[rutiger]

Originally Posted by Richard Branca

What were your 60 foots w/ the RIIs?

i don't have my timeslips with me, but i think i only once got a 1.9x and the rest of the time 2.0x. different psi never really changed anything. the r2s just don't flex enough to make a difference imo.

[robz]

Originally Posted by Richard Branca

What were your 60 foots w/ the RIIs?

I ran my Car today on street tires(nitto 555 r2's) for fun at the Corvette challenge.
Da= +2200
Psi= 16 1/2 cold
Track (average prep)
Best 60' was 1.723
I still feel these tires DONT make good launch tires but was pleased with the results. I think the nitto 555r tires would be in the high 1.5x's.