I have a friend who does not participate on the forum that just had the Jailbreak tune loaded on his 2011 XF Supercharged on Wednesday.

He said it made 471hp and 441 ft.lbs. on a Dynojet dyno. And the car is otherwise bone stock. When he sends me the run files I'll post the chart. Not sure if SAE or STD correction, but would assume SAE from what my XFR did with just the tune and x-pipe.

He's not a car guy and he had no issues getting everything prepared for the Jailbreak guys to load it remotely. Was done in an hour or two.

So for anyone looking for near XFR-S levels of power from your XF Supercharged, you can have it for $1,500. No additional mods necessary, but if you do more, you can get more as I've proven.

He didn't dyno it prior to the tune, but does anyone remember what an XF Supercharged does stock on a Dynojet? At any rate he's increased the HP and Torque enough to equal or better the crankshaft ratings. That's somewhere between 11% and 15% or 59bhp or 84bhp respectively (depending on what driveline loss percentage you want to use).

 

Thank you for the info. I was very interested in what an XF 5.0 S/C would do with just the JailBreak tune.

 

As i found out the only real use of a Dyno is to assess gains......they are all wildly different. My local Viezu tuners however are rolling roading about 1-2 XF and XK R's a week so have loads of baseline data.....they do range still i guess depending on temp, humidity......fuel....we get anything in tne UK from 95-99 RON......on a Mustang Dyno youre looking at 340-380RWHP stock.......

any mustang dyno's near you????

 

What did your friend say about how the car felt after the tune was installed? Seat of the pants feel etc?

 

Only meaningful result is pre-dyno & post-dyno. Quite cheap compared to mods but people don't often do the dynos!

 

He said at light throttle it still feels similar. More responsive and picks up better in the lower rpm range though. Said it runs "cleaner".

With larger applications of throttle he said the car is much more powerful and is a lot more fun. He has all seasons on his and said he's seeing the Traction Control light all the time in places he never did before. Said he's definitely happy as the tune solved the issues he had with his engine (hesitation from stop or slow start, passing on he freeway immediately and not waiting for the transmission to downshift before progress is made, etc). Problem for him was he drove mine. Once he knew what was possible, the differences bugged him worse than before.

He's going to get it redyno'd. The power went out at the shop because of an incoming Hurricane (sounds ridiculous, bit it's true) so they lost the run files. He's going to get it redone. Also found out the dyno operator was having trouble with the kickdown button, so will let him know how to avoid it.