I usually don't write reviews on tuners especially since my truck has only had two; Troyer and now JDM. My truck is a 2008 Roush blown 5.4l running 8psi, long tube headers, dual e-fans, Roush exhaust, and all were installed/tuned by Troyer.

I moved to CO about 4yrs ago and could never get the Troyer tunes down so I switched to JDM. Nick at JDM answered all my question and since I'm not the smartest when it comes to tuning he had to do some hand holding. I live at 6500ft elevation and the first tune I got from JDM was pure money. Took it to a dyno here and after data logging and sending the info back to JDM they said everything looked good. Said I could even move back to sea level without much of a issue if any since they tune OEM.

Not only does a OEM style tune save me money but I don't have to keep switching tunes. Kudos to the guys at JDM for making a legit tune at such high elevation in one shot! I lost a TON of power moving from sea level to here but it is what it is.

 

Every 1000ft of elevation will loose 10hp apparently.

Mine made 11 psi on the Dyno at 3000ft but barely makes 10psi here at 3700ft.

That's why I had it RR tuned as we encounter +35 <> -35C

JDM was an option but Iam glad it was rolled.

 

Glad to hear it, I ordered my tune two weeks ago from Jdm .. Still haven't received it , but anxiously awaiting its arrival..

 

Mine took about 3 weeks. Still better than the typical 6 month Troyer turn around.

 

nice....

jdm also does a great job with lightnings....imo