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I am going to call this the 37" tune. As I was using sport mode to add the missing zest that the 37" tires took away. I felt once I installed the FPP tune I didn't need sport mode and that it was feeling like when it had 35s. I put 400 miles on it today; interstate, canyon roads, off-road and town and there appears to be some improvements in mid-range power from the last time I drove to Moab (and the first time with 37s). The two CO mountain passes felt like the last 10 times I drove it in the Bronco on 35s; very little downshifting when at speed and scoots up to speed like I remember it.
0 to 60: Quickly downloading and looking at some pre and post-tune data logs, it appears that for the most part, the 0-60 (measured via data log time and speed) is roughly the same as pre-tune in sport mode. As a matter of fact- timing, boost and throttle opening appears to be roughly the same. This also goes for normal and sport post-tune. not much difference, mostly same shift rpms (2nd gear shift to 3rd was 150rpm higher in sport), timing and boost. There are some differences in timing retard during shifts and such, but not as much as I expected. All the 0-60 times appear to be around 9.5 seconds +\- .2 seconds. This was just a couple of quick runs, no boosted launch, just stab it and drive on the same exact road, at nearly the same temperature in the same direction. This doesn't mean that overall shifting, torque management and power is not improved. There are 15 different tables the PCM can reference and WOT (OP if it uses it) is just one of them. Just interesting first glance during one specific test. I still haven't been able to graph through the ProCal and the ProCal only records 6-7 parameters at a time , so I will have to do multiple tests, move the data and do the charts manually. Looking forward to everyone else's testing (actual 0-60, dyno numbers) Next week I will play with it. I still like it and feel the improvements and I could care less about 0-60, but it was an easy to test and duplicate.
I have made at least 10 round-trips to Moab from Denver in the Bronco this year, and I have averaged 18.2 MPG over 22,000 miles. My best to-Moab MPG was 20.5 I believe, but typically get 18.5-19 with the 35s. Today I filled up before heading out (91 Octane) and filled up in Grand Junction after about 250 miles. The instrument cluster calculated 19.1 MPG and I hand-calculated 19.06 MPG. I finished the trip, ran a trail and did some Moab cruising and ended up with 395 miles at 18.9 MPG. Not bad for 37s and packed with gear. I don't do 80 on the interstate (I keep it at 75), but otherwise do 5 over or so. Time will tell what the real average fuel economy will be and will report back after a few more thousand miles.
0 to 60: Quickly downloading and looking at some pre and post-tune data logs, it appears that for the most part, the 0-60 (measured via data log time and speed) is roughly the same as pre-tune in sport mode. As a matter of fact- timing, boost and throttle opening appears to be roughly the same. This also goes for normal and sport post-tune. not much difference, mostly same shift rpms (2nd gear shift to 3rd was 150rpm higher in sport), timing and boost. There are some differences in timing retard during shifts and such, but not as much as I expected. All the 0-60 times appear to be around 9.5 seconds +\- .2 seconds. This was just a couple of quick runs, no boosted launch, just stab it and drive on the same exact road, at nearly the same temperature in the same direction. This doesn't mean that overall shifting, torque management and power is not improved. There are 15 different tables the PCM can reference and WOT (OP if it uses it) is just one of them. Just interesting first glance during one specific test. I still haven't been able to graph through the ProCal and the ProCal only records 6-7 parameters at a time , so I will have to do multiple tests, move the data and do the charts manually. Looking forward to everyone else's testing (actual 0-60, dyno numbers) Next week I will play with it. I still like it and feel the improvements and I could care less about 0-60, but it was an easy to test and duplicate.
I have made at least 10 round-trips to Moab from Denver in the Bronco this year, and I have averaged 18.2 MPG over 22,000 miles. My best to-Moab MPG was 20.5 I believe, but typically get 18.5-19 with the 35s. Today I filled up before heading out (91 Octane) and filled up in Grand Junction after about 250 miles. The instrument cluster calculated 19.1 MPG and I hand-calculated 19.06 MPG. I finished the trip, ran a trail and did some Moab cruising and ended up with 395 miles at 18.9 MPG. Not bad for 37s and packed with gear. I don't do 80 on the interstate (I keep it at 75), but otherwise do 5 over or so. Time will tell what the real average fuel economy will be and will report back after a few more thousand miles.
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its interesting, I completely deleted the traction/stability control on a trail ride last week and the stock power, with “no” computer oversight, was really over the top. It felt like 330 HP! (I was on premium fuel lol) Clearly the entire system is exercising a lot of different parameters in spirited on-road and off road driving.
