Jayseven

iTrader: (1)

just got nitto 555r's on my fd. what psi should i run for street use.

spoolin93r1

i usually run 30-32 on the street and 14 at the strip. works pretty good for me. if you're plannin on doin any street racing from a dig, i'd recommend lower pressure on the street. my 555r's usually wheelhop at higher pressures

Jayseven

iTrader: (1)

thanks. i still have the stock diff so i cant launch hard. i will probably get a t2 diff within the next couple weeks or so.

fastcarfreak

it actually depends what kind of power you are making. If you trap over 120 mph, for a lot of drag radials they dont recommend going to low in pressure.
Adam

gnx7

iTrader: (10)

I ran low 30's on the street and never lower than 17psi at the track. Lower them to 20psi and do a healthy launch and note your launch RPM.

On the next launch drop them 1 psi.... if you 60ft better continue to drop psi on next launch. I found 17-18psi to be the best. Any lower and they would wander at the end of the 1/4 mile. 1.71 60ft time on 245/50/16 Nitto DR's.

BTW- brand new I could only get 1.78 best 60ft. After 1K miles and burnouts they got faster. Apparantly towards the end of their life they are the best. I found they require a smokey burnout or they won't get that sticky.

-GNX7

Gargamel

i run 12psi all the time.....

Jayseven

iTrader: (1)

i don't think so. thats all you buddy

spoolin93r1

i ran 14 with no problems. it got a slight bit wobbly when i ****** 2nd. but then i'm only running in the 1/8th mile. haven't gotten them in the 1/4 yet, but i've been around 140 with them at 15psi on the street and they felt fine. i think some people are just paranoid. i get too much wheelhop between 15-20 psi