I'll be running a tune for 91 octane and one for 113 with more timing.

I've modified the little area next to the defroster button to the left of the gauges to house the switch for my 4 bank chip. It uses an 8 position rotary switch. 0-3 are the different tunes, 4 turns the chip off and allows the OEM tune to be used and 5-8 are "no start" positions and the car will not crank.

You can switch inbetween tunes without damaging anything, only if it's not your OEM tune or anything that won't jive with your currant setup (too much timing for the octane you've got in the tank, OEM tune w/ boosted application like mine, etc)

Just do not remove your chip while the key is on! Ask Keyser

What's better about Xcal2 over the Raptor?


2005 Ford F150 SuperCab FX4 1964 Chevrolet Impala SS 1998 CSVT: 354HP/328TQ @ 10 psi, now gone