You'd leave it at 4.10 and change the rev's per mile or whatever it's called. That will correct your speedo for you.

That tire size calculator give you the revs/miles for you, but double check with some other calculators first as i'm not sure how accurate that one is.

 

what do you think about these tires eagle f1 in 255/55/18

http://www.tirerack.com/tires/tires....cleSearch=true

 

Turbos need more room to rev. A set of 4.10s decreases that. Also turbos make more power than superchagers up high, which will make traction even more of an issue with 4.10s.

One of my clients turbo06 will go sideways on the freeway at 60mph with 4.10s, then bounces off the rev-limiter and goes nowhere. It's just geared too low for the boost surge around 3200rpm.

 

tripod learn how to use google and the search button

 

My buddy is running 17 psi with his vortech and is methane injected also. He put down 520 to the wheels and is also running a 4:10. Because of the profile tire he is running its more like running a 4:30 in his car. He spent around250 bucksper wheel and had the rears widend to fit a 315 BF drag. When I drove the car it seemed to hook preety darn good on the street. He was also able to pull mid 11 sec times with the set up at close to 127mph. By the way the wheels do not stick out either.

 

yeah ok newb, at least im not lying about my rwhp douche bag

and thanks for bringing up an old post just to insult me. it really shows your ignorance

 

Try it out with the 4.10's and them evaluate the situation. No point worrying about it now

 

+1 try it as is, but if it's your DD like you say it might be a little tricky on wet roads. IMO 3.73's would be the way to go.