Hi gata,

"WOT" means Wide-Open Throttle.

"WOT upshift" means where it will shift when you have the throttle wide-open - and we usually refer to that in terms of the number of RPMs the engine is turning.

Feel free to use the SEARCH feature to retrieve & read any of the many previous posts we've made explaining WOT upshift points, how part-throttle shift points vary based on vehicle speed, load & throttle position, etc..

 

Trying to get info on this. With the superchip set to hi-perf, do I face any risk when hooking up and pulling another vehicle out of the ditch in reverse. As the snow falls in Northern Illinois, lots of drivers end up in the ditch. I have always gotten a charge out of strapping them up and pulling them out. The bigger the vehicle the more fun I have. My 98 F150 never failed. I expect my 04 will function the same. My setings in the superchip match hellbound's. Today, I will gather rpm shift points and report them back.

 

OK... Following are a couple of answers to Mike's questions concerning Hellbound's custom settings. Today, I will try to answer the remaining questions. Its raining here so not much else to do.

1> 1-2 Shift occurs at 5250 RPMs
2> 2-3 Shift occurs at 5300 RPMs

At 110 MPH, RPMs were 4200-4300. I backed off; but, will conduct additional testing today as soon as I get some answers.

Both were measured from a standing start. Mike has indicated that it should not be necessary to mess with the Superchip settings. Here is why I am messing with them and will continue to mess with them.

Even the 87 tune resulted in very harsh shifting from 1-2 and 2-3. The Hi-Perf tune did the same. I am trying to achieve a tune that achieves the performance gains; but, does not include the harsh shifting.

From a standing start, both shifts are sharp; but, not harsh. No jerking is felt. Now, driving down a two lane road, at 60 MPH & approx 1650 RPM, then accelerating with WOT, causes a harsh jerk and then, of course, rapid increase in speed. This harsh jerk causes me concern.

Today, I am going to go back to Stock and test the truck, then load the superchips hi-Perf tune and test the truck, then load Hellbound's settings - maybe modify the psi at each shift point, then test the truck.

I am fairly certain that the Hi-Perf will cause the harsh shifting; but, I need a valid test for each.

Things to note:

My tires are slightly oversized at 33.25" compared to stock. Of course, this is added into the tunes.

At approx 10,000 miles, Ford replaced the transmission completely due to a faulty torque converter.

My other mods are Airaid Intake & Magnaflow SIDO

 

I am experimenting with this as well. I have the 87 octane loaded and find the downshifts from 3rd to 2nd and 2nd to 3rd too harsh and engage with a bang if you floor it. I set the shift pressures back to stock which helped a bit, but the downshift still occurs with a bang if you floor it. Going to change the shift points back to stock next and see if this helps.

 

My tire diameter is 29.99" and my gears are 3.73. If you guys deviate from these numbers your results may be far from mine. Just an FYI.

I suggest if you dislike the SC settings, then toy with it until it feels right for you.

The best is to dyno tune truthfully.

If you can dyno tune, then I would set it according to that.