Lifetime Supporting Member
Join Date: Apr 2011
Location: St. Augustine, Florida
Feedback Score: 0 reviews
I'm actually pretty curious about this, too. I've got an NVK2, and years ago I got a second hand DPTuner F5. I had it reburned, and when I went to install it discovered that I had an old Hypertech chip on the PCM. I decided to try the F5, since I had heard such good things about it. First, I noticed that the engine sounded louder. Then, the shift points were different - I could hold my foot at one position, and the RPMs would stay the same, but the truck accelerated and shifted perfectly, going to lockup and 4th at 41 mph with the hypertech, but with the DP I had to give it progressively more throttle to accelerate and it didn't shift to 4th and lockup until closer to 46 mph. Not a big deal, but I have several 45 mph streets where I'm at, and it's nice turning 1100 rpm instead of 1500 at those speeds. I lost almost 2 MPG with the DP, hand calculated, and had much more severe problems with the windshield wipers interfering with the engine.
I've run the Hypertech since, but I'm wondering if anyone else has discovered the same kind of problems. I hate to disparage DP, since I know he does good work and several people swear by his tunes, but I just didn't see the improvements.
Hypertech said their Power Tuning Module gained 51hp and 108 ft lbs torque as well as raising boost slightly and raising line pressure to firm up shifting. I was running the DP 60 daily tune, and I'm not sure what the specs are for that. I tried the DP for a month before I reverted.
99.5 F250 7.3 PSD Supercab Shortbed 4x4 on 315 75 16s
Front leveling springs, Hutch and Harpoon mods, A pillar 3 gauge pod with DiPricol Trans, Boost and EGT, Scangauge II, CNC Fab HPOP and HPX lines, Riffraff FRX, 2004 Heated and Lighted mirrors