I hope I dont sound like a complete idiot here. haha I have a new f150 4x4 with 35" tires. Being I havent changed my differential, are all my gauges and performance tests pointless? Is there any way to set this up so my speed is right? I am tired of tickets. haha What are the ideal setting for my truck? I using:

2007 5.4
Level 2 WOT shift: 1-2 @5300, 2-3 @5200, 3-4 @4700
Firm: 1-2 +7, 2-3 +7, 3-4 +5
Rev limit: 5500
Tires: 2652
Gears: 3.55
Fuel: 1.70

I want best performance without chance of damage to the truck. Any help would be greatly appreciated.

 

If you go into custom options and change your tune to match all your trucks specs (gears, tire size, etc) your speedo should be right. Maybe off 1 or 2 mph due to run out or something like that (I think I remember reading this somewhere on here). Measure your tires too, don't use a generic number as this may be different due to tire squash (Not sure exactly what it is called). If this don't work something is wrong. If you have a gps try and use this as a comparison. I did this method above and my speedo is dead on. Nice truck by the way.

 

Well my speedo is off. When I am driving, I have to go by the gps built in my stereo or I get these wierd flashing red and blue lights behind me. haha 70mph shows around 64mph speedo.

 

Don't need no unwanted attraction from the 5-0. Sounds like you should measure your tire size and reset the tire size. Mark tire on bottom center and down on the pavement even with some chaulk or marker, then roll forward or backward until tire is bottom center again in the same spot and put a mark on the pavement again. Measure this distance between these two lines and see if it is the same as your value entered for tire size. Double check all other settings too. This should help. If not, then something else is up, maybe something with the programmer is messed up and its not adjusting your tire size. You should be able to check this in the custom options menu after all your settings are programmed in by going to the "load the previous settings".

 

I did measure it and check to make sure it kept my settings. It did. It is matching my speedo. I would like it to be my true speed though I can test anything. I could have just had someone program it and me not spend 450 bucks. haha oh well. Thanks for trying to help man. Your a cool kat!