I own a 2010 XFR and Im wondering if the XF-RS tune can be flashed on my ecu. I know there is an 8 speed dct in the RS to my 6 speed auto.

Thanks in advance.

 

Read through this: https://www.jaguarforums.com/forum/x...pgrade-122048/

That should have the answer that you are seeking.

 

That post tells me nothing.

 

The XFR-S tune cannot be flashed onto a 2010-2012 XFR due to the ECM manufacturer being different (Bosch vs Denso). However, the XKR-S tune can be uploaded onto the 2010-2012 XFR's.

It becomes a matter of having your dealer download the programming from the XKR-S, modifying the VIN number to match your car, and re-uploading the XKR-S parameters.

Although it sounds simple, it is a rather difficult operation to perform due to 1. finding a dealership willing to do this flash and 2. finding a dealership with an older version of IDS/SDD that is able to download and modify the files.

Good luck!

 

Thanks, that puts me on the right track.

 

Or you can get an aftermarket tune.

 

How about putting the XFR-S tune on '13+ XFRs? (I have a '13 XFR)

The thread linked above seems to allude that the Bosch/'13+ models are tougher, but doesn't explain why.

If any of you have experience convincing a dealer to apply flashes and are willing to share what magic words were said to get them to do it, would love to hear how (via PM, and of course off the record).

 

I would consider an aftermarket tune, but no where can I find data on final numbers. What I'd really like to know is what can be tweaked in the ECU and TCU.

 

Check my posts and signature. I got a custom tune from Jailbreak Tuning. I posted dyno results before and after tune and after the pulley. I think my tune and pulley number would be better if my supercharger cooler were working properly. It only creates a problem after multiple 1/2 mile runs and then it put me into restricted mode. For my tune and pulley dyno runs, the first (when the car was coolest) actually made the tires slip on the dyno. I think the reduced cooling causes accelerated heat soak and then the AFR went more like a stock run because of fuel dump to prevent detonation.

I loved the extra power my car had after just the tune. The extra torque gained with the pulley is noticeable, but not really usable or necessary. If I could do it again, I'd do tune only.

If you want to discuss it further, PM me and we can exchange numbers.

 

I would look toward the aftermarket as well. Unless you could convince the dealer to flash the "RS" tune for free, I personally have no desire for another super rich, conservative OEM tune on my car.

 

All of the numbers I've seen posted by "consumers" are right in line with a XF-RS reflash. 40 hp increase to the wheels. I'd like to know a little more information, such as, what is the air fuel look like at WOT, timing, torque management options. I bring my vette to a local speed shop that does CTS-v upgrades and they are gaining 90+hp and 118rwtq to the wheels with pulley and tune. HP tuners allows complete control of the ECU. I just find it hard to believe that these custom tuners cant manage to make more power than the "super rich/conservative" tune of the XF-RS. Looks to me like you are just paying $1200 for a factory tune.

 

If I recall, someone on here who flashed an OEM RS tune found he lost some power / torque on the bottom to mid end and gained it all up top. Don't quote me on that though I'm too lazy to dig it up. I'm really interested in the aftermarket tuners pushing the torque curve to the left rather than make all top end power.
My biggest complaint is that there just aren't a lot of tuning options in the aftermarket that are a reasonable price, and not a lot of tuners willing to push the envelope a little. There are some obvious reasons for that (and others we could speculate on), but we will probably never get the aftermarket support of Ford / GM etc. Those owners offer a bigger market for tuners and so many of those share the same engines so maps can be created and then just tweaked a little for each application.

 

You have to remember that the CTS-V is a much larger displacement motor with a higher ceiling for HP. The XFR is only a 5.0 and is in a fairly high state of tune from the factory. If you look for tunes on say a 458 Ferrari or Maserati Gran Terismo they gain very little power. The tuner I went to said he could have made more power but he didn't like what it did to both curves. For street driving, my tune has so much better throttle response and the torque is enough to raise the suspension/hood up quite a bit more than when stock. It feels faster everywhere in the powerband. One thing we could do to give ourselves a higher limit of tune and still be safe is either water or methanol injection. But that's a whole other subject.

 

Also, thanks for giving us your feedback from your reflash.

 

What I meant by high state of tune is we are getting over 100 bhp per liter. And we all know that you just can't over boost a supercharger like you can a turbo without making other changes to intercoolers or some type of fuel cooling like water/methanol injection. Otherwise that nice piece of aluminum in your engine bay turns into a big lump of coal in your Christmas stocking.

I asked my tuner to give me a street/driveable tune that would be dead reliable. They experimented with higher states of tune but determined that for what my goals were, I got the best torque and hp curves in this configuration with no risk of detonation on 91 pump gas.

We also have to worry about heat soak with this motor and if it's hot, the ecu will still dump fuel to make sure it doesn't detonate.

Hope that helps explain my thoughts and experiences.