Okay so I have a 2010 xfr and I want to have more horsepower close to the xfr S I've been seeing a lot of Post online about you have to buy a handheld tuner and haven't collaborated at a local place or you can do it yourself I'm not sure what to do I can't seem to find anyone in my area in Fort Lauderdale who knows anything about these feelings because they're always about American cars so no one wants to help me anyway if I can get any kind of information from someone as to who has a nice good to know that I can purchase and maybe change the upper pulley that would be great I don't know what company is the best I doing this but I would like to have someone tell me if they've had the same thing done to their car and it turned out and if it's a good thing I am how the performance really changed their car any help is appreciated thank you

love the graphics. makes everyone look and give a thumbs up!

 

I run a VAP lower pulley and stage II tune on my 2014 XJR.
Easy to install yourself.
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Changing the upper pulley is definitely a good thing for power, but its quite hard to get off the S/C snout without damaging it.

To get the most from it change the pulley and cats, then remap the engine of transmission - none of which are DIY type projects unless you're a good mechanic, welder and have the magic programming tools.

 

So I got an email from velocity in Canada telling me that I can buy the handheld tuner for about $900 I assume I just program it myself just like I did my Corvette when I had a predator handheld Diablo I'm assuming it's the same thing I wonder how much horsepower I can get out of it if I do not change the upper pulley however I did speak to a shop that does European cars and he said it's not a big deal as long as you have the proper tools so I figured if I paid somebody to do it they obviously cannot break anything because it will be covered under a warranty anyway what are your thoughts about this if anyone knows about that place velocity in Canada let me know

 

VAP give you a handheld tuner loaded with a tuning file that you just add, no alteration needed.