120/1850/23/Normal (or eco) spool is the norm for these trucks (in most cases). My 2015 had issues with the 60HP setting with the rail pressure spiking coming out of snap throttle scenarios (floor it and let off real quick). Never had an issue with the 120...still running a 120HP base with WARP tuning over 30,000 miles later without so much as a hiccup.
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easttxram Have you figured out what settings you were running?
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wjhill92 Welcome to the forum, first of all. Secondly, rail pressure is going to spike under load. Also, the box tunes aren't the cleanest out there, you're going to get smoke (more so under heavy load at low boost). My 120 box tune would smoke out an intersection if I hammered on it. Unfortunately, this is just the nature of "universal" tunes.
As you'll quickly see on the forum, WARP is the way to go. If you have the monetary ability to get custom tuning, I strongly recommend that you do. Every truck is a little different and that is why WARP is a must have. Ray at @
Double R Diesel is swamped with work, but drop him a line and get in the queue for WARP tuning. It will save you a bunch of headaches.
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