Has anyone had any luck with a tuner for the 510 HP XFR?

Would like to see if I can get it over 600?

I'm in S. Florida.

Also, Has anyone put wider than stock tires on an XFR and if so, how big were you able to go?

thanks

hobeXFR,
There is a company that seems to have a lot of followers. ECU Tuning is located in Miami. Several folks around Boca Raton have had work done and I have an appointment on the 19th in Lake Wales. Crossing fingers to see outputs. I have a 2011 XJ NA motor.
You will find info on the forum about them. I believe they are a sponsor but not sure, they are sure adding posts daily.
Fire34609

Fire34609, Just curious did you ever get this done? I have an XJ 5.0 (NA) and wondering how this turned out for you. I'm in South FL also ... thanks!!!

Jaser35x,
No I have actually not had the tuning done. I am presently watching and waiting for the
F-Type to come out and decide if I am moving that way.
I have not seen anything but good results from postings here. But, I have changed the exhaust to something we created local through the aftermarket gentleman here in Tampa, and I have seen and heard an improvement in performance.
Thanks Fire34609