^^^This.

You say you don’t trust mechanics but I get the impression you don’t understand... They’re not really changing anything mechanically with a e-tune. Just programming your car to use what it has more efficiently.

You can get Z1, Specialty Z, or Admin Tuning to tune your car remotely.
Any one of them have tuned more VQ motors than you’ve ever seen in your life.
In all honesty, they’ve probably forgotten more about Z cars than you or I will ever even know.

I took my car to Admin tuning last week for a retune with ecutek and gained over 30hp and 30tq to the wheels on tune alone. I have 4 different maps I can choose from via the buttons on the steering wheel in 3 seconds. Also my throttle mapping is perfect, no need to switch from Mr. Rogers to Dominic Torreto via anything but your foot. If I’m easy on the gas she drive smooth and nice. If I give it the beans she sh*ts and gets. Not only that but now I get better mpg, I have flat foot shifting and launch control.

As I said before, whatever you’re happy with... but to me, the extra features, better mpg, and more hp/tq with a better power curve, and better throttle map than the sprint booster, is worth the extra $320 over the sprint booster.

No one is scolding you or saying you’re wrong, they’re just giving you the best options for your Z, for your wallet, and for your enjoyment. :ugh2:

And here I am just using the tune with none of the features lol.

I bought a used Sprint Booster from classified here a couple years ago for about $100. I like it, my daughters Hyundai has a button on the dash "Sport" that does the same thing to a lesser extent. It does the same as Motorcycle quarter turn throttle, or old dragger enlarged throttle pulley, this is just an electronic version of the same thing that enthusiasts have done since bootlegger days. That being said, I would replace it with an Up Rev if I could afford it. :)

Finally got around taking the picture of the unit installed. Both on setting 5, one on sports and the other one in racing modes

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Update
 

So after having this unit, I still like the results overall. I now have more fun driving the vehicle, meaning I can baby it and make it a monster by pressing one button. One thing I noticed is that it works better if you turn off the stability control, on the negative side I went from 21 mpg to 16 mpg and it's because now I drive it as I stole it, maybe doing the muffler delete has something to do with it but, really I feel that I have another vehicle since I bought the Booster...:driving::tiphat:

I saw that you sold your Sprint Booster in the classifieds here, did you decide to get a tune instead?

My sprint Booster will not work any more. Can anyone tell me what to check on my 2014 nissan 370Z. &&& I have tried many things with no luck. That part make my car so fast

They work so well only mine will not work any more & I dont know what else to check to get it working again. I even brought 2 more of them thinking maybe the part just was no good after two years but that did not work either